./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcmp_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcmp_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 aeb0ffd1fb7d571e7b8e6363e4fb0cbfb012450e9b632e655c35a1ee40a56c64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:44:17,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:44:17,614 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 12:44:17,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:44:17,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:44:17,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:44:17,643 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:44:17,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:44:17,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:44:17,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:44:17,646 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:44:17,646 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:44:17,647 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:44:17,647 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:44:17,648 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:44:17,648 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:44:17,649 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:44:17,649 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:44:17,649 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:44:17,650 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:44:17,650 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:44:17,651 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:44:17,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:44:17,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:44:17,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:44:17,653 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:44:17,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:44:17,654 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:44:17,655 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:44:17,655 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:44:17,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:44:17,656 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:44:17,656 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:44:17,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:44:17,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:44:17,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:44:17,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:44:17,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:44:17,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:44:17,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:44:17,658 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:44:17,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:44:17,658 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:44:17,659 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:44:17,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:44:17,659 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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeb0ffd1fb7d571e7b8e6363e4fb0cbfb012450e9b632e655c35a1ee40a56c64 [2023-12-02 12:44:17,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:44:17,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:44:17,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:44:17,907 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:44:17,907 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:44:17,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-15/cstrcmp_malloc.i [2023-12-02 12:44:20,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:44:20,886 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:44:20,887 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/sv-benchmarks/c/termination-15/cstrcmp_malloc.i [2023-12-02 12:44:20,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/4e3b2288e/81665788317a476ebe4a1abebf5572e7/FLAGeb9aa2afd [2023-12-02 12:44:20,909 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/4e3b2288e/81665788317a476ebe4a1abebf5572e7 [2023-12-02 12:44:20,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:44:20,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:44:20,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:44:20,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:44:20,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:44:20,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:44:20" (1/1) ... [2023-12-02 12:44:20,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4553471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:20, skipping insertion in model container [2023-12-02 12:44:20,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:44:20" (1/1) ... [2023-12-02 12:44:20,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:44:21,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:44:21,210 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:44:21,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:44:21,276 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:44:21,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21 WrapperNode [2023-12-02 12:44:21,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:44:21,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:44:21,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:44:21,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:44:21,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,295 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,317 INFO L138 Inliner]: procedures = 152, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 74 [2023-12-02 12:44:21,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:44:21,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:44:21,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:44:21,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:44:21,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,340 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:44:21,343 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:44:21,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:44:21,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:44:21,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (1/1) ... [2023-12-02 12:44:21,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:44:21,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:21,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:44:21,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:44:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:44:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:44:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:44:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:44:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:44:21,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:44:21,499 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:44:21,501 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:44:21,707 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:44:21,796 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:44:21,797 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:44:21,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:44:21 BoogieIcfgContainer [2023-12-02 12:44:21,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:44:21,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:44:21,802 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:44:21,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:44:21,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:44:20" (1/3) ... [2023-12-02 12:44:21,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a524f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:44:21, skipping insertion in model container [2023-12-02 12:44:21,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:44:21" (2/3) ... [2023-12-02 12:44:21,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a524f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:44:21, skipping insertion in model container [2023-12-02 12:44:21,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:44:21" (3/3) ... [2023-12-02 12:44:21,807 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp_malloc.i [2023-12-02 12:44:21,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:44:21,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-12-02 12:44:21,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:44:21,868 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;@6c3a2a62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:44:21,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-12-02 12:44:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 17 states have (on average 2.411764705882353) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 12:44:21,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:21,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 12:44:21,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:21,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 3768, now seen corresponding path program 1 times [2023-12-02 12:44:21,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:21,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458133217] [2023-12-02 12:44:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:22,140 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 12:44:22,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458133217] [2023-12-02 12:44:22,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458133217] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:22,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:22,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696175422] [2023-12-02 12:44:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:22,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,183 INFO L87 Difference]: Start difference. First operand has 39 states, 17 states have (on average 2.411764705882353) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:22,239 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-12-02 12:44:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:22,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 12:44:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:22,250 INFO L225 Difference]: With dead ends: 37 [2023-12-02 12:44:22,250 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:44:22,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,255 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:44:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 12:44:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 17 states have (on average 2.176470588235294) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-12-02 12:44:22,286 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 2 [2023-12-02 12:44:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:22,286 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-12-02 12:44:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-12-02 12:44:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 12:44:22,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:22,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 12:44:22,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:44:22,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:22,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash 3769, now seen corresponding path program 1 times [2023-12-02 12:44:22,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:22,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240318607] [2023-12-02 12:44:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:22,503 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 12:44:22,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240318607] [2023-12-02 12:44:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240318607] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893678131] [2023-12-02 12:44:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:22,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,507 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:22,549 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-12-02 12:44:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:22,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 12:44:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:22,550 INFO L225 Difference]: With dead ends: 34 [2023-12-02 12:44:22,551 INFO L226 Difference]: Without dead ends: 34 [2023-12-02 12:44:22,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,553 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:22,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-02 12:44:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-02 12:44:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-12-02 12:44:22,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 2 [2023-12-02 12:44:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:22,558 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-12-02 12:44:22,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-12-02 12:44:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 12:44:22,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:22,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 12:44:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:44:22,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:22,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash 116797, now seen corresponding path program 1 times [2023-12-02 12:44:22,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:22,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481831398] [2023-12-02 12:44:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:22,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:22,600 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 12:44:22,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481831398] [2023-12-02 12:44:22,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481831398] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:22,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:22,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:22,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54987932] [2023-12-02 12:44:22,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:22,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:22,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,603 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:22,638 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-02 12:44:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 12:44:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:22,639 INFO L225 Difference]: With dead ends: 33 [2023-12-02 12:44:22,639 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 12:44:22,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,641 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:22,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 12:44:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-02 12:44:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 2.0) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-12-02 12:44:22,647 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 3 [2023-12-02 12:44:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:22,647 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-12-02 12:44:22,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-12-02 12:44:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 12:44:22,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:22,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 12:44:22,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:44:22,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 116798, now seen corresponding path program 1 times [2023-12-02 12:44:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:22,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906204451] [2023-12-02 12:44:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:22,798 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 12:44:22,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:22,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906204451] [2023-12-02 12:44:22,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906204451] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:22,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:22,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576974327] [2023-12-02 12:44:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,801 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:22,839 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-12-02 12:44:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 12:44:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:22,840 INFO L225 Difference]: With dead ends: 32 [2023-12-02 12:44:22,840 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 12:44:22,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:22,842 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:22,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 14 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 12:44:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-02 12:44:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-02 12:44:22,848 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 3 [2023-12-02 12:44:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:22,848 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-02 12:44:22,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-02 12:44:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:44:22,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:22,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:44:22,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:44:22,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:22,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 3622533, now seen corresponding path program 1 times [2023-12-02 12:44:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115371171] [2023-12-02 12:44:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:22,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:22,894 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 12:44:22,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115371171] [2023-12-02 12:44:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115371171] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:22,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783858872] [2023-12-02 12:44:22,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:22,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:44:22,897 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:22,949 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-12-02 12:44:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:44:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:22,950 INFO L225 Difference]: With dead ends: 29 [2023-12-02 12:44:22,950 INFO L226 Difference]: Without dead ends: 29 [2023-12-02 12:44:22,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:44:22,952 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:22,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-02 12:44:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-02 12:44:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-02 12:44:22,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 4 [2023-12-02 12:44:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:22,957 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-02 12:44:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-02 12:44:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:44:22,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:22,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:44:22,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:44:22,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:22,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash 3622534, now seen corresponding path program 1 times [2023-12-02 12:44:22,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:22,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775231483] [2023-12-02 12:44:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,039 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 12:44:23,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:23,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775231483] [2023-12-02 12:44:23,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775231483] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:23,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:23,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497945378] [2023-12-02 12:44:23,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:44:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:44:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:44:23,042 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:23,105 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-12-02 12:44:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:23,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:44:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:23,107 INFO L225 Difference]: With dead ends: 40 [2023-12-02 12:44:23,107 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 12:44:23,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:44:23,108 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:23,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 12:44:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-12-02 12:44:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-12-02 12:44:23,114 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 4 [2023-12-02 12:44:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:23,114 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-12-02 12:44:23,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-12-02 12:44:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:44:23,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:23,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:44:23,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash 546369513, now seen corresponding path program 1 times [2023-12-02 12:44:23,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:23,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910847211] [2023-12-02 12:44:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,154 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 12:44:23,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:23,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910847211] [2023-12-02 12:44:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910847211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:23,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:23,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:44:23,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649511623] [2023-12-02 12:44:23,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:23,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:23,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:23,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:23,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:23,157 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:23,184 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-12-02 12:44:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:44:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:23,186 INFO L225 Difference]: With dead ends: 33 [2023-12-02 12:44:23,186 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 12:44:23,186 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 12:44:23,187 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:23,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 12:44:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-02 12:44:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.608695652173913) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-02 12:44:23,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 7 [2023-12-02 12:44:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:23,192 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-02 12:44:23,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-02 12:44:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:44:23,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:23,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:23,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:44:23,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:23,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 546369514, now seen corresponding path program 1 times [2023-12-02 12:44:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896329925] [2023-12-02 12:44:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,312 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 12:44:23,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:23,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896329925] [2023-12-02 12:44:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896329925] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:23,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:23,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:44:23,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607975915] [2023-12-02 12:44:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:23,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:23,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:23,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:44:23,315 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:23,383 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-12-02 12:44:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:44:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:44:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:23,384 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:44:23,384 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:44:23,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:44:23,386 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:23,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 16 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:44:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-12-02 12:44:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-12-02 12:44:23,391 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2023-12-02 12:44:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:23,391 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-12-02 12:44:23,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-12-02 12:44:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:44:23,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:23,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:44:23,393 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:23,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 546378587, now seen corresponding path program 1 times [2023-12-02 12:44:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423136171] [2023-12-02 12:44:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,416 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 12:44:23,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:23,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423136171] [2023-12-02 12:44:23,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423136171] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:23,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:23,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:23,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608883087] [2023-12-02 12:44:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:23,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:23,419 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:23,436 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-12-02 12:44:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:44:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:23,438 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:44:23,438 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:44:23,438 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 12:44:23,439 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:23,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:44:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 12:44:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-02 12:44:23,444 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 7 [2023-12-02 12:44:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:23,445 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-02 12:44:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-02 12:44:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:44:23,446 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:23,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:23,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:44:23,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:23,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1075137604, now seen corresponding path program 1 times [2023-12-02 12:44:23,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:23,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247131732] [2023-12-02 12:44:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:23,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,695 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 12:44:23,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:23,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247131732] [2023-12-02 12:44:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247131732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815731520] [2023-12-02 12:44:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:23,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:23,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:23,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:44:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:23,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 12:44:23,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:23,885 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 12:44:23,992 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-12-02 12:44:23,993 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 23 treesize of output 22 [2023-12-02 12:44:24,380 INFO L349 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2023-12-02 12:44:24,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 56 treesize of output 44 [2023-12-02 12:44:24,432 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 12:44:24,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:24,792 INFO L349 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2023-12-02 12:44:24,792 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 2 case distinctions, treesize of input 208 treesize of output 175 [2023-12-02 12:44:24,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:24,820 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 77 treesize of output 75 [2023-12-02 12:44:24,837 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 15 treesize of output 11 [2023-12-02 12:44:24,880 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 24 treesize of output 22 [2023-12-02 12:44:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:44:24,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:24,909 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 46 treesize of output 53 [2023-12-02 12:44:25,020 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 12:44:25,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815731520] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:25,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438826676] [2023-12-02 12:44:25,039 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:44:25,040 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:25,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:25,049 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:25,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:26,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:27,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '763#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0))' at error location [2023-12-02 12:44:27,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:27,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:27,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-12-02 12:44:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008342454] [2023-12-02 12:44:27,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:44:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:44:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=730, Unknown=1, NotChecked=0, Total=870 [2023-12-02 12:44:27,911 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:29,345 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-02 12:44:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:44:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 12:44:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:29,347 INFO L225 Difference]: With dead ends: 61 [2023-12-02 12:44:29,347 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:44:29,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=479, Invalid=1776, Unknown=1, NotChecked=0, Total=2256 [2023-12-02 12:44:29,349 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:29,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 14 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:44:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:44:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2023-12-02 12:44:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.40625) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-12-02 12:44:29,354 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 9 [2023-12-02 12:44:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:29,354 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-12-02 12:44:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-12-02 12:44:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:44:29,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:29,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:29,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:44:29,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:44:29,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:29,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -761750940, now seen corresponding path program 1 times [2023-12-02 12:44:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:29,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237980585] [2023-12-02 12:44:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:29,591 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 12:44:29,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237980585] [2023-12-02 12:44:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237980585] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:29,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464926919] [2023-12-02 12:44:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:29,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:29,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:29,593 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:29,610 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-12-02 12:44:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:29,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:44:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:29,611 INFO L225 Difference]: With dead ends: 38 [2023-12-02 12:44:29,611 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 12:44:29,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:29,612 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:29,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 12:44:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-02 12:44:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.375) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-12-02 12:44:29,616 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 10 [2023-12-02 12:44:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:29,616 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-12-02 12:44:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-12-02 12:44:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:44:29,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:29,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:29,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:44:29,618 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:29,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:29,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1854876012, now seen corresponding path program 1 times [2023-12-02 12:44:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:29,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982682129] [2023-12-02 12:44:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:29,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982682129] [2023-12-02 12:44:29,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982682129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185096511] [2023-12-02 12:44:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:29,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:29,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:44:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:44:30,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:30,076 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 14 treesize of output 10 [2023-12-02 12:44:30,359 INFO L349 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2023-12-02 12:44:30,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 48 treesize of output 58 [2023-12-02 12:44:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:30,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:30,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:30,722 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 91 treesize of output 91 [2023-12-02 12:44:30,733 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 15 treesize of output 11 [2023-12-02 12:44:30,771 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 32 treesize of output 30 [2023-12-02 12:44:30,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:30,790 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 49 treesize of output 49 [2023-12-02 12:44:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:30,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185096511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:30,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727872842] [2023-12-02 12:44:30,814 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:44:30,814 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:30,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:30,815 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:30,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:31,692 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:32,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= |ULTIMATE.start_cstrcmp_#t~mem206#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) |ULTIMATE.start_cstrcmp_#t~short208#1| (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1))' at error location [2023-12-02 12:44:32,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:32,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:32,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-12-02 12:44:32,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136099545] [2023-12-02 12:44:32,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:32,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:44:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:44:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=649, Unknown=1, NotChecked=0, Total=756 [2023-12-02 12:44:32,681 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:33,998 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-12-02 12:44:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:44:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:44:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:33,999 INFO L225 Difference]: With dead ends: 47 [2023-12-02 12:44:33,999 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 12:44:34,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=229, Invalid=1251, Unknown=2, NotChecked=0, Total=1482 [2023-12-02 12:44:34,000 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 106 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:44:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 12:44:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2023-12-02 12:44:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.34375) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-12-02 12:44:34,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 12 [2023-12-02 12:44:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:34,003 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-12-02 12:44:34,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-12-02 12:44:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:44:34,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:34,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:34,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:44:34,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 12:44:34,205 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:34,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1285034911, now seen corresponding path program 1 times [2023-12-02 12:44:34,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:34,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820562343] [2023-12-02 12:44:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:34,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:34,234 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 12:44:34,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820562343] [2023-12-02 12:44:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820562343] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:34,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:34,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 12:44:34,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409062526] [2023-12-02 12:44:34,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:44:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:44:34,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:34,236 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:34,250 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-12-02 12:44:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 12:44:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:34,251 INFO L225 Difference]: With dead ends: 37 [2023-12-02 12:44:34,251 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 12:44:34,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:44:34,252 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 12:44:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-02 12:44:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-02 12:44:34,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2023-12-02 12:44:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:34,257 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-02 12:44:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-02 12:44:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:44:34,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:34,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:34,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:44:34,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:34,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1181376680, now seen corresponding path program 1 times [2023-12-02 12:44:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:34,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456086805] [2023-12-02 12:44:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:34,343 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 12:44:34,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456086805] [2023-12-02 12:44:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456086805] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:34,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:34,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:44:34,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143554574] [2023-12-02 12:44:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:44:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:44:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:44:34,345 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:34,365 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-12-02 12:44:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:44:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 12:44:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:34,366 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:44:34,366 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:44:34,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:44:34,367 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:44:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 12:44:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-12-02 12:44:34,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 14 [2023-12-02 12:44:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:34,371 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-12-02 12:44:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-12-02 12:44:34,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:44:34,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:34,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:34,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:44:34,372 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:34,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:34,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2032028478, now seen corresponding path program 1 times [2023-12-02 12:44:34,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:34,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929922408] [2023-12-02 12:44:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:34,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:34,534 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 12:44:34,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:34,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929922408] [2023-12-02 12:44:34,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929922408] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:34,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:34,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:44:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084738826] [2023-12-02 12:44:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:44:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:44:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:44:34,536 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:34,594 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-12-02 12:44:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:44:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 12:44:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:34,595 INFO L225 Difference]: With dead ends: 35 [2023-12-02 12:44:34,595 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 12:44:34,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:44:34,596 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:44:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 12:44:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 12:44:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-12-02 12:44:34,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 15 [2023-12-02 12:44:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:34,599 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-12-02 12:44:34,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:44:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-12-02 12:44:34,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:44:34,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:34,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-12-02 12:44:34,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 12:44:34,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:44:34,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1365414186, now seen corresponding path program 2 times [2023-12-02 12:44:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197621885] [2023-12-02 12:44:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:34,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:35,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197621885] [2023-12-02 12:44:35,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197621885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564005133] [2023-12-02 12:44:35,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:44:35,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:35,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:35,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:35,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:44:35,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:44:35,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:44:35,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 12:44:35,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:35,233 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 14 treesize of output 10 [2023-12-02 12:44:51,765 INFO L349 Elim1Store]: treesize reduction 22, result has 81.8 percent of original size [2023-12-02 12:44:51,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 126 [2023-12-02 12:44:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:52,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:53,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:53,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 181 treesize of output 189 [2023-12-02 12:44:53,424 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 15 treesize of output 11 [2023-12-02 12:44:53,473 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 16 [2023-12-02 12:44:53,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:53,551 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 57 treesize of output 61 [2023-12-02 12:44:53,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:53,623 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 81 treesize of output 93 [2023-12-02 12:44:53,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:53,752 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 168 treesize of output 188 [2023-12-02 12:44:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:44:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564005133] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558469351] [2023-12-02 12:44:54,854 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:44:54,854 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:54,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:54,854 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:54,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:55,599 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:56,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1538#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= |ULTIMATE.start_cstrcmp_#t~mem206#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 0 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|) |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0) |ULTIMATE.start_cstrcmp_#t~short208#1| (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1))' at error location [2023-12-02 12:44:56,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:56,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:56,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 32 [2023-12-02 12:44:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984589884] [2023-12-02 12:44:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:56,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 12:44:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 12:44:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1474, Unknown=9, NotChecked=0, Total=1640 [2023-12-02 12:44:56,978 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 34 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:03,340 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 12:45:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:05,980 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2023-12-02 12:45:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:45:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 12:45:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:05,981 INFO L225 Difference]: With dead ends: 41 [2023-12-02 12:45:05,981 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 12:45:05,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=507, Invalid=3264, Unknown=11, NotChecked=0, Total=3782 [2023-12-02 12:45:05,983 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 152 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:05,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 9 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 12:45:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 12:45:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-12-02 12:45:05,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-12-02 12:45:05,986 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 17 [2023-12-02 12:45:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:05,986 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-12-02 12:45:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-12-02 12:45:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:45:05,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:05,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-12-02 12:45:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:45:06,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:45:06,188 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:45:06,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2096915068, now seen corresponding path program 2 times [2023-12-02 12:45:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:06,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111331957] [2023-12-02 12:45:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:06,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:45:06,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:45:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111331957] [2023-12-02 12:45:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111331957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674496000] [2023-12-02 12:45:06,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:45:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:06,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:06,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:45:06,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 12:45:06,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:06,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 12:45:06,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:06,742 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 10 treesize of output 8 [2023-12-02 12:45:06,765 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 13 treesize of output 9 [2023-12-02 12:45:06,805 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 18 treesize of output 13 [2023-12-02 12:45:07,262 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2023-12-02 12:45:07,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 69 [2023-12-02 12:45:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:45:07,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:10,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:45:10,280 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 64 treesize of output 42 [2023-12-02 12:45:10,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:45:10,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 75 treesize of output 112 [2023-12-02 12:45:10,337 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 15 treesize of output 11 [2023-12-02 12:45:10,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:45:10,367 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 28 treesize of output 46 [2023-12-02 12:45:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:45:10,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674496000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:45:10,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210642570] [2023-12-02 12:45:10,568 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:45:10,568 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:45:10,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:45:10,568 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:45:10,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:45:11,088 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:45:12,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1805#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 0 |ULTIMATE.start_cstrcmp_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcmp_#in~s1#1.offset| 0))' at error location [2023-12-02 12:45:12,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:45:12,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:45:12,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 34 [2023-12-02 12:45:12,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366863919] [2023-12-02 12:45:12,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:45:12,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 12:45:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:45:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 12:45:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1601, Unknown=2, NotChecked=0, Total=1806 [2023-12-02 12:45:12,388 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:15,491 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2023-12-02 12:45:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 12:45:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 12:45:15,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:15,492 INFO L225 Difference]: With dead ends: 54 [2023-12-02 12:45:15,492 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:45:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=700, Invalid=3588, Unknown=2, NotChecked=0, Total=4290 [2023-12-02 12:45:15,494 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 6 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:45:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:45:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2023-12-02 12:45:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-12-02 12:45:15,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 19 [2023-12-02 12:45:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:15,497 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-12-02 12:45:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:45:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-12-02 12:45:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:45:15,498 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:15,498 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-12-02 12:45:15,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 12:45:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:15,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:45:15,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2123080298, now seen corresponding path program 3 times [2023-12-02 12:45:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071685996] [2023-12-02 12:45:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:45:16,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:45:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071685996] [2023-12-02 12:45:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071685996] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:16,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117605332] [2023-12-02 12:45:16,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:45:16,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:16,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:16,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:16,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:45:16,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:45:16,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:45:16,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-02 12:45:16,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:16,392 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 14 treesize of output 10 [2023-12-02 12:45:18,887 INFO L349 Elim1Store]: treesize reduction 66, result has 83.4 percent of original size [2023-12-02 12:45:18,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 111 treesize of output 372 [2023-12-02 12:52:54,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 12:52:54,112 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:52:54,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:52:54,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1360283519] [2023-12-02 12:52:54,114 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:52:54,114 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:52:54,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:52:54,115 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:52:54,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:52:54,118 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:52:54,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:52:54,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 12:52:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206777080] [2023-12-02 12:52:54,121 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:54,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:52:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:52:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:52:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2023-12-02 12:52:54,122 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:52:54,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2023-12-02 12:52:54,124 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 12:52:54,124 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 12:52:54,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:52:54,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:52:54,325 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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:52:54,327 INFO L158 Benchmark]: Toolchain (without parser) took 513413.97ms. Allocated memory was 125.8MB in the beginning and 559.9MB in the end (delta: 434.1MB). Free memory was 83.6MB in the beginning and 190.1MB in the end (delta: -106.5MB). Peak memory consumption was 330.5MB. Max. memory is 16.1GB. [2023-12-02 12:52:54,327 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 125.8MB. Free memory is still 98.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:52:54,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.24ms. Allocated memory is still 125.8MB. Free memory was 83.2MB in the beginning and 65.2MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 12:52:54,327 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.81ms. Allocated memory is still 125.8MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:52:54,327 INFO L158 Benchmark]: Boogie Preprocessor took 24.70ms. Allocated memory is still 125.8MB. Free memory was 63.1MB in the beginning and 61.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:52:54,328 INFO L158 Benchmark]: RCFGBuilder took 455.28ms. Allocated memory was 125.8MB in the beginning and 153.1MB in the end (delta: 27.3MB). Free memory was 61.8MB in the beginning and 121.8MB in the end (delta: -60.0MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. [2023-12-02 12:52:54,328 INFO L158 Benchmark]: TraceAbstraction took 512524.44ms. Allocated memory was 153.1MB in the beginning and 559.9MB in the end (delta: 406.8MB). Free memory was 121.5MB in the beginning and 190.1MB in the end (delta: -68.6MB). Peak memory consumption was 340.3MB. Max. memory is 16.1GB. [2023-12-02 12:52:54,330 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 125.8MB. Free memory is still 98.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.24ms. Allocated memory is still 125.8MB. Free memory was 83.2MB in the beginning and 65.2MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.81ms. Allocated memory is still 125.8MB. Free memory was 65.2MB in the beginning and 63.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.70ms. Allocated memory is still 125.8MB. Free memory was 63.1MB in the beginning and 61.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 455.28ms. Allocated memory was 125.8MB in the beginning and 153.1MB in the end (delta: 27.3MB). Free memory was 61.8MB in the beginning and 121.8MB in the end (delta: -60.0MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. * TraceAbstraction took 512524.44ms. Allocated memory was 153.1MB in the beginning and 559.9MB in the end (delta: 406.8MB). Free memory was 121.5MB in the beginning and 190.1MB in the end (delta: -68.6MB). Peak memory consumption was 340.3MB. 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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcmp_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 aeb0ffd1fb7d571e7b8e6363e4fb0cbfb012450e9b632e655c35a1ee40a56c64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:52:56,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:52:56,202 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-12-02 12:52:56,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:52:56,208 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:52:56,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:52:56,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:52:56,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:52:56,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:52:56,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:52:56,242 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:52:56,243 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:52:56,243 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:52:56,244 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:52:56,244 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:52:56,245 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:52:56,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:52:56,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:52:56,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:52:56,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:52:56,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:52:56,249 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:52:56,250 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:52:56,250 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:52:56,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:52:56,251 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:52:56,251 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 12:52:56,252 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 12:52:56,252 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:52:56,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:52:56,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:52:56,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 12:52:56,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:52:56,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:52:56,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:52:56,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:52:56,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:52:56,255 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 12:52:56,256 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 12:52:56,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:52:56,256 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:52:56,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:52:56,257 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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeb0ffd1fb7d571e7b8e6363e4fb0cbfb012450e9b632e655c35a1ee40a56c64 [2023-12-02 12:52:56,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:52:56,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:52:56,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:52:56,580 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:52:56,581 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:52:56,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-15/cstrcmp_malloc.i [2023-12-02 12:52:59,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:52:59,665 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:52:59,665 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/sv-benchmarks/c/termination-15/cstrcmp_malloc.i [2023-12-02 12:52:59,677 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/cc364d61d/8307366882d340339a05df85b01b267d/FLAG4cf745650 [2023-12-02 12:52:59,692 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/data/cc364d61d/8307366882d340339a05df85b01b267d [2023-12-02 12:52:59,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:52:59,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:52:59,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:52:59,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:52:59,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:52:59,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:59" (1/1) ... [2023-12-02 12:52:59,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34336b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:52:59, skipping insertion in model container [2023-12-02 12:52:59,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:52:59" (1/1) ... [2023-12-02 12:52:59,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:53:00,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:53:00,038 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:53:00,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:53:00,115 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:53:00,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00 WrapperNode [2023-12-02 12:53:00,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:53:00,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:53:00,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:53:00,117 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:53:00,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,159 INFO L138 Inliner]: procedures = 153, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-12-02 12:53:00,160 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:53:00,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:53:00,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:53:00,161 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:53:00,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,173 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:53:00,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:53:00,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:53:00,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:53:00,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (1/1) ... [2023-12-02 12:53:00,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:53:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:53:00,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:53:00,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:53:00,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-12-02 12:53:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:53:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-12-02 12:53:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:53:00,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:53:00,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:53:00,352 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:53:00,355 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:53:00,751 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:53:00,787 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:53:00,787 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:53:00,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:53:00 BoogieIcfgContainer [2023-12-02 12:53:00,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:53:00,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:53:00,791 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:53:00,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:53:00,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:52:59" (1/3) ... [2023-12-02 12:53:00,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b51c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:53:00, skipping insertion in model container [2023-12-02 12:53:00,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:53:00" (2/3) ... [2023-12-02 12:53:00,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b51c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:53:00, skipping insertion in model container [2023-12-02 12:53:00,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:53:00" (3/3) ... [2023-12-02 12:53:00,797 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp_malloc.i [2023-12-02 12:53:00,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:53:00,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-12-02 12:53:00,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:53:00,859 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;@5e1cd1a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:53:00,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-12-02 12:53:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 20 states have (on average 2.3) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:53:00,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:00,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:53:00,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:00,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 101747318, now seen corresponding path program 1 times [2023-12-02 12:53:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105790421] [2023-12-02 12:53:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:00,888 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 12:53:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:00,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:00,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:00,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:53:00,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:01,045 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 12:53:01,046 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-12-02 12:53:01,073 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 12:53:01,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:01,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105790421] [2023-12-02 12:53:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105790421] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:01,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:53:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294152938] [2023-12-02 12:53:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:53:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:01,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:53:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:53:01,112 INFO L87 Difference]: Start difference. First operand has 42 states, 20 states have (on average 2.3) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:01,312 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-12-02 12:53:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:53:01,315 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 12:53:01,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:01,322 INFO L225 Difference]: With dead ends: 40 [2023-12-02 12:53:01,322 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 12:53:01,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 12:53:01,327 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:01,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:53:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 12:53:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-02 12:53:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 2.1) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-12-02 12:53:01,353 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 5 [2023-12-02 12:53:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:01,353 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-12-02 12:53:01,353 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-12-02 12:53:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:53:01,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:01,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:53:01,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:01,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:01,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 101747319, now seen corresponding path program 1 times [2023-12-02 12:53:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:01,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877022744] [2023-12-02 12:53:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:01,557 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 12:53:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:01,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:01,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:01,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:53:01,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:53:01,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:01,675 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 10 treesize of output 8 [2023-12-02 12:53:01,701 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 12:53:01,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:01,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877022744] [2023-12-02 12:53:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877022744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:01,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:01,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415245625] [2023-12-02 12:53:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:01,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:01,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:01,704 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:01,921 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2023-12-02 12:53:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:01,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 12:53:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:01,923 INFO L225 Difference]: With dead ends: 74 [2023-12-02 12:53:01,923 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 12:53:01,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:01,925 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:01,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:53:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 12:53:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2023-12-02 12:53:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 2.15625) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-12-02 12:53:01,933 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 5 [2023-12-02 12:53:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:01,934 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-12-02 12:53:01,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-12-02 12:53:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:53:01,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:01,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:53:01,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Ended with exit code 0 [2023-12-02 12:53:02,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:02,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 101806901, now seen corresponding path program 1 times [2023-12-02 12:53:02,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:02,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145478029] [2023-12-02 12:53:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:02,137 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 12:53:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:02,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:02,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:53:02,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:53:02,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:02,226 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 10 treesize of output 8 [2023-12-02 12:53:02,250 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 12:53:02,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:02,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:02,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145478029] [2023-12-02 12:53:02,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145478029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:02,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:02,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:02,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999414059] [2023-12-02 12:53:02,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:02,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:02,253 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:02,453 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2023-12-02 12:53:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 12:53:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:02,455 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:53:02,455 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 12:53:02,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:02,457 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:02,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:53:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 12:53:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2023-12-02 12:53:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 2.0) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-12-02 12:53:02,463 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 5 [2023-12-02 12:53:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:02,463 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-12-02 12:53:02,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-12-02 12:53:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:53:02,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:02,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:53:02,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:02,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1140800449, now seen corresponding path program 1 times [2023-12-02 12:53:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614738362] [2023-12-02 12:53:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:02,666 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 12:53:02,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:02,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:02,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:53:02,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:02,721 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 12:53:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:53:02,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 1 [2023-12-02 12:53:02,741 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 12:53:02,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:02,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:02,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614738362] [2023-12-02 12:53:02,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614738362] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:02,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:02,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:53:02,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118396304] [2023-12-02 12:53:02,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:02,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:53:02,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:53:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:53:02,744 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:02,856 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-12-02 12:53:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:53:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 12:53:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:02,857 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:53:02,857 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 12:53:02,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 12:53:02,859 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:02,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 12:53:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 12:53:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.95) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-12-02 12:53:02,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 6 [2023-12-02 12:53:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:02,864 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-12-02 12:53:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-12-02 12:53:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:53:02,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:02,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:53:02,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:03,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1140800448, now seen corresponding path program 1 times [2023-12-02 12:53:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:03,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913743373] [2023-12-02 12:53:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:03,066 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 12:53:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:03,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:03,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:53:03,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:03,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:03,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:03,175 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 12:53:03,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:03,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913743373] [2023-12-02 12:53:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913743373] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:03,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:03,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:03,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339951794] [2023-12-02 12:53:03,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:03,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:03,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:03,178 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:03,521 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-12-02 12:53:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 12:53:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:03,523 INFO L225 Difference]: With dead ends: 67 [2023-12-02 12:53:03,523 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 12:53:03,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:03,524 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:03,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 65 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:53:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 12:53:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2023-12-02 12:53:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-12-02 12:53:03,531 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 6 [2023-12-02 12:53:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:03,532 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-12-02 12:53:03,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-12-02 12:53:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:53:03,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:03,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:53:03,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,735 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:03,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1140740866, now seen corresponding path program 1 times [2023-12-02 12:53:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104203802] [2023-12-02 12:53:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:03,737 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 12:53:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:03,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:03,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:53:03,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:03,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:03,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:03,851 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 12:53:03,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:03,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:03,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104203802] [2023-12-02 12:53:03,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104203802] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:03,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:03,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:03,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799666957] [2023-12-02 12:53:03,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:03,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:03,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:03,853 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:04,021 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-12-02 12:53:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:04,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 12:53:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:04,023 INFO L225 Difference]: With dead ends: 48 [2023-12-02 12:53:04,023 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 12:53:04,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:04,024 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:04,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:53:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 12:53:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2023-12-02 12:53:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.85) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-12-02 12:53:04,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 6 [2023-12-02 12:53:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:04,028 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-12-02 12:53:04,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-12-02 12:53:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:53:04,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:04,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:04,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Ended with exit code 0 [2023-12-02 12:53:04,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:04,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1005073725, now seen corresponding path program 1 times [2023-12-02 12:53:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:04,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043398821] [2023-12-02 12:53:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:04,234 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 12:53:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:04,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:04,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:53:04,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:04,309 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 12:53:04,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:04,310 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043398821] [2023-12-02 12:53:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043398821] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:04,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:04,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:04,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392298733] [2023-12-02 12:53:04,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:04,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:04,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:04,312 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:04,448 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-12-02 12:53:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:53:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:04,449 INFO L225 Difference]: With dead ends: 31 [2023-12-02 12:53:04,450 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 12:53:04,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:53:04,451 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:04,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 12:53:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 12:53:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.7) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-12-02 12:53:04,454 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2023-12-02 12:53:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:04,455 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-12-02 12:53:04,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-12-02 12:53:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:53:04,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:04,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:04,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:04,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:04,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1005073724, now seen corresponding path program 1 times [2023-12-02 12:53:04,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:04,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809554252] [2023-12-02 12:53:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:04,658 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 12:53:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:04,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:04,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:53:04,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:04,772 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 12:53:04,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:04,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:04,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809554252] [2023-12-02 12:53:04,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809554252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:04,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:04,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:53:04,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411773126] [2023-12-02 12:53:04,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:04,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:53:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:53:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:53:04,775 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:05,223 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-12-02 12:53:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:53:05,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:53:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:05,224 INFO L225 Difference]: With dead ends: 71 [2023-12-02 12:53:05,224 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 12:53:05,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:53:05,225 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:05,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 101 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:53:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 12:53:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2023-12-02 12:53:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-12-02 12:53:05,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 7 [2023-12-02 12:53:05,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:05,231 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-12-02 12:53:05,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-12-02 12:53:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:53:05,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:05,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:05,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:05,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:05,435 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:05,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -947815422, now seen corresponding path program 1 times [2023-12-02 12:53:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:05,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655378192] [2023-12-02 12:53:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:05,436 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 12:53:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:05,437 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:05,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:05,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:53:05,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:05,608 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 12:53:05,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:05,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:05,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655378192] [2023-12-02 12:53:05,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655378192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:05,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:05,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:53:05,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037774963] [2023-12-02 12:53:05,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:53:05,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:53:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:53:05,610 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:06,071 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-12-02 12:53:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:53:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:53:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:06,072 INFO L225 Difference]: With dead ends: 52 [2023-12-02 12:53:06,072 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 12:53:06,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:53:06,073 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:06,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:53:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 12:53:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2023-12-02 12:53:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-12-02 12:53:06,077 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 7 [2023-12-02 12:53:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:06,078 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-12-02 12:53:06,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-12-02 12:53:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:53:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:06,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:06,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:06,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1932649749, now seen corresponding path program 1 times [2023-12-02 12:53:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790872810] [2023-12-02 12:53:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:06,280 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 12:53:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:06,281 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:06,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:53:06,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:06,335 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 12:53:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:53:06,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 1 [2023-12-02 12:53:06,366 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 12:53:06,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:06,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790872810] [2023-12-02 12:53:06,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790872810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:06,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:06,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894416305] [2023-12-02 12:53:06,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:06,368 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:06,506 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-12-02 12:53:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:53:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:06,507 INFO L225 Difference]: With dead ends: 35 [2023-12-02 12:53:06,507 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 12:53:06,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:53:06,508 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:06,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 12:53:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-02 12:53:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-12-02 12:53:06,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 10 [2023-12-02 12:53:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:06,512 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-12-02 12:53:06,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-12-02 12:53:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:53:06,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:06,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:06,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,716 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:06,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1932649748, now seen corresponding path program 1 times [2023-12-02 12:53:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:06,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918056415] [2023-12-02 12:53:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:06,717 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 12:53:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:06,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:06,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (12)] Waiting until timeout for monitored process [2023-12-02 12:53:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:06,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:53:06,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:06,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:06,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:06,868 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 12:53:06,868 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:06,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:06,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918056415] [2023-12-02 12:53:06,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918056415] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:06,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:53:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313513221] [2023-12-02 12:53:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:53:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:53:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:53:06,870 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:07,352 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2023-12-02 12:53:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:53:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:53:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:07,353 INFO L225 Difference]: With dead ends: 68 [2023-12-02 12:53:07,353 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 12:53:07,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:53:07,354 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:07,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:53:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 12:53:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2023-12-02 12:53:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-02 12:53:07,358 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 10 [2023-12-02 12:53:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:07,359 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-02 12:53:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-02 12:53:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:53:07,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:07,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:07,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (12)] Ended with exit code 0 [2023-12-02 12:53:07,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:07,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:07,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1932640675, now seen corresponding path program 1 times [2023-12-02 12:53:07,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:07,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932893739] [2023-12-02 12:53:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:07,564 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 12:53:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:07,565 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:07,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (13)] Waiting until timeout for monitored process [2023-12-02 12:53:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:07,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:53:07,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:07,629 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 12:53:07,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:07,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932893739] [2023-12-02 12:53:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932893739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821444757] [2023-12-02 12:53:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:53:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:53:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:53:07,631 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:07,689 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-12-02 12:53:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:53:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:53:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:07,691 INFO L225 Difference]: With dead ends: 48 [2023-12-02 12:53:07,691 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 12:53:07,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 12:53:07,692 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:07,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 12:53:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-02 12:53:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.435897435897436) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-12-02 12:53:07,696 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 10 [2023-12-02 12:53:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:07,696 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-12-02 12:53:07,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-12-02 12:53:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:53:07,696 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:07,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:07,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (13)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:07,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:07,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:07,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1552970922, now seen corresponding path program 1 times [2023-12-02 12:53:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:07,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065764657] [2023-12-02 12:53:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:07,898 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 12:53:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:07,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:07,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:07,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:53:07,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:07,976 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 7 treesize of output 6 [2023-12-02 12:53:07,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:08,110 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 12:53:08,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:08,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065764657] [2023-12-02 12:53:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065764657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:08,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:53:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216554417] [2023-12-02 12:53:08,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:53:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:53:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:53:08,113 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:08,504 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-12-02 12:53:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:53:08,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:53:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:08,505 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:53:08,505 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 12:53:08,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:53:08,506 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:08,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:53:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 12:53:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2023-12-02 12:53:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-12-02 12:53:08,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2023-12-02 12:53:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:08,510 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-12-02 12:53:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-12-02 12:53:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:53:08,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:08,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:08,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:08,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:08,711 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:08,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1850491194, now seen corresponding path program 1 times [2023-12-02 12:53:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:08,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260109287] [2023-12-02 12:53:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:08,712 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 12:53:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:08,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:08,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:08,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:53:08,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:08,810 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 12:53:08,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:53:09,028 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2023-12-02 12:53:09,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 44 [2023-12-02 12:53:09,049 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 12:53:09,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:09,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260109287] [2023-12-02 12:53:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260109287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:09,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:09,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 12:53:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856882843] [2023-12-02 12:53:09,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:53:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:09,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:53:09,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:53:09,052 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:09,622 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-12-02 12:53:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:53:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:53:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:09,623 INFO L225 Difference]: With dead ends: 62 [2023-12-02 12:53:09,623 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 12:53:09,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:53:09,624 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:09,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 79 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:53:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 12:53:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2023-12-02 12:53:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-12-02 12:53:09,627 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 12 [2023-12-02 12:53:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:09,628 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-12-02 12:53:09,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-12-02 12:53:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:53:09,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:09,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:09,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:09,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:09,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2051449092, now seen corresponding path program 1 times [2023-12-02 12:53:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568767810] [2023-12-02 12:53:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:09,830 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 12:53:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:09,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:09,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Waiting until timeout for monitored process [2023-12-02 12:53:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:09,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:53:09,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:09,920 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 10 treesize of output 8 [2023-12-02 12:53:09,953 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 13 treesize of output 9 [2023-12-02 12:53:09,991 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 18 treesize of output 13 [2023-12-02 12:53:10,018 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:53:10,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:10,021 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 35 treesize of output 25 [2023-12-02 12:53:10,034 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 12:53:10,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:10,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:10,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568767810] [2023-12-02 12:53:10,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568767810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:10,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:10,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:53:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460891374] [2023-12-02 12:53:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:10,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:53:10,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:10,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:53:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:53:10,036 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:10,327 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-12-02 12:53:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:53:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:53:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:10,328 INFO L225 Difference]: With dead ends: 71 [2023-12-02 12:53:10,328 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 12:53:10,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:53:10,329 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:10,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 73 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:53:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 12:53:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2023-12-02 12:53:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.380952380952381) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-12-02 12:53:10,332 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 12 [2023-12-02 12:53:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:10,333 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-12-02 12:53:10,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-12-02 12:53:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:53:10,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:10,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:10,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Ended with exit code 0 [2023-12-02 12:53:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:10,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:10,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1542453626, now seen corresponding path program 1 times [2023-12-02 12:53:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:10,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873719448] [2023-12-02 12:53:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:10,536 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 12:53:10,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:10,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:10,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (17)] Waiting until timeout for monitored process [2023-12-02 12:53:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:10,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 12:53:10,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:10,645 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2023-12-02 12:53:10,645 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 1 case distinctions, treesize of input 12 treesize of output 10 [2023-12-02 12:53:10,659 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 10 treesize of output 8 [2023-12-02 12:53:10,701 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 11 [2023-12-02 12:53:10,775 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 20 treesize of output 15 [2023-12-02 12:53:10,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:10,855 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 37 treesize of output 33 [2023-12-02 12:53:11,150 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 12:53:11,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:12,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:12,550 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 26 treesize of output 27 [2023-12-02 12:53:12,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:12,646 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 40 treesize of output 38 [2023-12-02 12:53:12,733 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 12:53:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:53:13,201 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 10 treesize of output 8 [2023-12-02 12:53:13,348 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 12:53:13,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873719448] [2023-12-02 12:53:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873719448] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499882611] [2023-12-02 12:53:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:13,350 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 12:53:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:13,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:53:13,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:13,495 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 10 treesize of output 8 [2023-12-02 12:53:13,632 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 11 [2023-12-02 12:53:13,917 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 20 treesize of output 15 [2023-12-02 12:53:14,652 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 12:53:14,652 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 22 treesize of output 18 [2023-12-02 12:53:15,190 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 12:53:15,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:15,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:15,793 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-12-02 12:53:15,965 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:15,966 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 40 treesize of output 38 [2023-12-02 12:53:15,980 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 28 treesize of output 24 [2023-12-02 12:53:16,493 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 12:53:18,289 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 12:53:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499882611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498091771] [2023-12-02 12:53:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:53:18,291 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:53:18,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:53:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:18,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 12:53:18,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:18,378 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 10 treesize of output 8 [2023-12-02 12:53:18,399 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 11 [2023-12-02 12:53:18,463 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 20 treesize of output 15 [2023-12-02 12:53:18,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:18,529 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 37 treesize of output 33 [2023-12-02 12:53:19,064 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 12:53:19,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:19,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:19,739 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 26 treesize of output 27 [2023-12-02 12:53:19,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:19,852 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 40 treesize of output 38 [2023-12-02 12:53:19,868 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 28 treesize of output 24 [2023-12-02 12:53:20,406 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 12:53:22,073 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 12:53:22,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498091771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:22,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:53:22,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 7, 7, 7] total 24 [2023-12-02 12:53:22,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003581236] [2023-12-02 12:53:22,074 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:53:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 12:53:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 12:53:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-12-02 12:53:22,076 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 25 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:27,656 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2023-12-02 12:53:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:53:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 12:53:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:27,659 INFO L225 Difference]: With dead ends: 66 [2023-12-02 12:53:27,659 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 12:53:27,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 12:53:27,660 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 247 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:27,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 78 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 12:53:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 12:53:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2023-12-02 12:53:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-02 12:53:27,664 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 12 [2023-12-02 12:53:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:27,665 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-02 12:53:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-02 12:53:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:53:27,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:27,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:27,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 12:53:27,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 (17)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:28,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 12:53:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:28,266 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1261930462, now seen corresponding path program 1 times [2023-12-02 12:53:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:28,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176047401] [2023-12-02 12:53:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:28,268 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 12:53:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:28,268 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:28,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:53:28,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:28,354 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 12:53:28,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:28,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:28,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176047401] [2023-12-02 12:53:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176047401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:28,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:53:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808450678] [2023-12-02 12:53:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:28,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:53:28,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:53:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:53:28,356 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:28,469 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-12-02 12:53:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:53:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 12:53:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:28,470 INFO L225 Difference]: With dead ends: 54 [2023-12-02 12:53:28,470 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 12:53:28,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 12:53:28,471 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:28,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 12:53:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 12:53:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-12-02 12:53:28,474 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 13 [2023-12-02 12:53:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:28,475 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-12-02 12:53:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-12-02 12:53:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:53:28,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:28,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:28,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:28,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 620769258, now seen corresponding path program 1 times [2023-12-02 12:53:28,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:28,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638474829] [2023-12-02 12:53:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:28,677 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 12:53:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:28,678 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:28,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 12:53:28,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:28,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:28,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:28,794 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 11 [2023-12-02 12:53:29,149 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:53:29,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:53:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:29,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:30,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:30,920 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 118 treesize of output 118 [2023-12-02 12:53:30,983 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 39 treesize of output 37 [2023-12-02 12:53:31,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:31,091 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 82 treesize of output 80 [2023-12-02 12:53:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:31,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:31,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638474829] [2023-12-02 12:53:31,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638474829] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:31,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028947237] [2023-12-02 12:53:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:31,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:31,946 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:31,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 12:53:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:32,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:53:32,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:32,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:32,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:32,107 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 11 [2023-12-02 12:53:32,324 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:53:32,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:53:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:32,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:33,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:33,024 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 118 treesize of output 118 [2023-12-02 12:53:33,214 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 39 treesize of output 37 [2023-12-02 12:53:33,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:33,473 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 82 treesize of output 80 [2023-12-02 12:53:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:34,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028947237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12684800] [2023-12-02 12:53:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:34,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:53:34,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:53:34,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 12:53:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:34,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:53:34,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:34,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:53:34,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:53:34,973 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 11 [2023-12-02 12:53:35,174 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:53:35,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:53:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:35,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:35,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:35,883 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 118 treesize of output 118 [2023-12-02 12:53:35,976 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 39 treesize of output 37 [2023-12-02 12:53:36,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:36,229 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 82 treesize of output 80 [2023-12-02 12:53:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:36,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12684800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:36,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:53:36,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 9, 8] total 18 [2023-12-02 12:53:36,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272302771] [2023-12-02 12:53:36,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:53:36,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:53:36,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:53:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:53:36,751 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:41,370 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-12-02 12:53:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 12:53:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 12:53:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:41,372 INFO L225 Difference]: With dead ends: 69 [2023-12-02 12:53:41,373 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 12:53:41,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 12:53:41,374 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 143 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:41,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 67 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 12:53:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 12:53:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2023-12-02 12:53:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-12-02 12:53:41,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 15 [2023-12-02 12:53:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:41,376 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-12-02 12:53:41,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-12-02 12:53:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:53:41,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:41,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:41,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Ended with exit code 0 [2023-12-02 12:53:41,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 12:53:41,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 12:53:41,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:53:41,978 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:41,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -321555167, now seen corresponding path program 1 times [2023-12-02 12:53:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:41,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57042282] [2023-12-02 12:53:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:41,978 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 12:53:41,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:41,979 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:41,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:42,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:53:42,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:42,082 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 12:53:42,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:42,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:42,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57042282] [2023-12-02 12:53:42,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57042282] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:42,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:42,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:53:42,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722504276] [2023-12-02 12:53:42,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:42,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:53:42,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:53:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:53:42,084 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:42,181 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-12-02 12:53:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:53:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 12:53:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:42,182 INFO L225 Difference]: With dead ends: 56 [2023-12-02 12:53:42,182 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 12:53:42,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 12:53:42,183 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:42,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 12:53:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-02 12:53:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-12-02 12:53:42,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2023-12-02 12:53:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:42,186 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-12-02 12:53:42,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-12-02 12:53:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:53:42,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:42,186 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 12:53:42,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,387 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:42,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:42,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1378275482, now seen corresponding path program 1 times [2023-12-02 12:53:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:42,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38030876] [2023-12-02 12:53:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:42,388 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 12:53:42,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:42,389 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:42,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:53:42,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:42,485 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 12:53:42,485 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 19 treesize of output 22 [2023-12-02 12:53:42,589 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 0 case distinctions, treesize of input 23 treesize of output 18 [2023-12-02 12:53:42,601 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 12:53:42,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:42,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:42,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38030876] [2023-12-02 12:53:42,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38030876] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:42,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:42,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:53:42,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137095042] [2023-12-02 12:53:42,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:42,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:53:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:53:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:42,603 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:42,721 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-12-02 12:53:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:53:42,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 12:53:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:42,722 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:53:42,722 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:53:42,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:53:42,723 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:42,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:53:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:53:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-02 12:53:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-02 12:53:42,725 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 17 [2023-12-02 12:53:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:42,725 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-02 12:53:42,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-02 12:53:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 12:53:42,726 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:42,726 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 12:53:42,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:42,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 223133124, now seen corresponding path program 1 times [2023-12-02 12:53:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778606040] [2023-12-02 12:53:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:53:42,928 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 12:53:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:42,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:42,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:53:43,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:53:43,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:45,604 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|ULTIMATE.start_main_~nondetString2~0#1.base| (_ BitVec 64)) (v_DerPreprocessor_5 (_ BitVec 1)) (|ULTIMATE.start_main_~nondetString1~0#1.base| (_ BitVec 64)) (v_ArrVal_238 (_ BitVec 1))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_238) |ULTIMATE.start_main_~nondetString2~0#1.base|) (_ bv0 1)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| (_ bv0 1)) |ULTIMATE.start_main_~nondetString2~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base|) (_ bv0 1)) (= (bvadd v_DerPreprocessor_5 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString2~0#1.base| v_DerPreprocessor_5) |ULTIMATE.start_main_~nondetString1~0#1.base| (_ bv0 1)) |ULTIMATE.start_main_~nondetString2~0#1.base|)) (_ bv0 1)))) (exists ((|ULTIMATE.start_main_~nondetString2~0#1.base| (_ BitVec 64)) (|ULTIMATE.start_main_~nondetString1~0#1.base| (_ BitVec 64)) (v_ArrVal_238 (_ BitVec 1))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_238) |ULTIMATE.start_main_~nondetString2~0#1.base|) (_ bv0 1)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| (_ bv0 1)) |ULTIMATE.start_main_~nondetString2~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base|) (_ bv0 1)))) (exists ((|ULTIMATE.start_main_~nondetString2~0#1.base| (_ BitVec 64)) (v_DerPreprocessor_4 (_ BitVec 1)) (|ULTIMATE.start_main_~nondetString1~0#1.base| (_ BitVec 64)) (v_DerPreprocessor_1 (_ BitVec 1))) (and (not (= |ULTIMATE.start_main_~nondetString2~0#1.base| |ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| (_ bv0 1)) |ULTIMATE.start_main_~nondetString2~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString1~0#1.base| v_DerPreprocessor_1) |ULTIMATE.start_main_~nondetString2~0#1.base| (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~nondetString2~0#1.base| v_DerPreprocessor_4) |ULTIMATE.start_main_~nondetString1~0#1.base| (_ bv0 1)) |ULTIMATE.start_main_~nondetString2~0#1.base|)) |ULTIMATE.start_main_~nondetString1~0#1.base|)) |ULTIMATE.start_main_~nondetString2~0#1.base|))))) is different from true [2023-12-02 12:53:45,605 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 12:53:45,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:53:45,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778606040] [2023-12-02 12:53:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778606040] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:53:45,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:53:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:53:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394317001] [2023-12-02 12:53:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:53:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:53:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:53:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:53:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2023-12-02 12:53:45,607 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:47,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:49,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:51,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:53:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:53:52,799 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-12-02 12:53:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:53:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-02 12:53:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:53:52,800 INFO L225 Difference]: With dead ends: 54 [2023-12-02 12:53:52,800 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 12:53:52,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=19, Invalid=25, Unknown=2, NotChecked=10, Total=56 [2023-12-02 12:53:52,801 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:53:52,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 3 Unknown, 25 Unchecked, 6.5s Time] [2023-12-02 12:53:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 12:53:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 12:53:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2023-12-02 12:53:52,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2023-12-02 12:53:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:53:52,803 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2023-12-02 12:53:52,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:53:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2023-12-02 12:53:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:53:52,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:53:52,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:53:52,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:53,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:53,005 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:53:53,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:53:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1129573702, now seen corresponding path program 2 times [2023-12-02 12:53:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:53:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208495092] [2023-12-02 12:53:53,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:53:53,006 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 12:53:53,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:53:53,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:53:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Waiting until timeout for monitored process [2023-12-02 12:53:53,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:53:53,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:53:53,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:53:53,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:53,160 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2023-12-02 12:53:53,161 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 1 case distinctions, treesize of input 12 treesize of output 10 [2023-12-02 12:53:53,173 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 10 treesize of output 8 [2023-12-02 12:53:53,210 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 11 [2023-12-02 12:53:53,276 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 20 treesize of output 15 [2023-12-02 12:53:53,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:53,647 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 37 treesize of output 33 [2023-12-02 12:53:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:53,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:58,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:58,354 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 28 treesize of output 29 [2023-12-02 12:53:58,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:58,432 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 40 [2023-12-02 12:53:58,540 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 5 [2023-12-02 12:53:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:53:59,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:53:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:53:59,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:53:59,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208495092] [2023-12-02 12:53:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208495092] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:53:59,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [931908911] [2023-12-02 12:53:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:53:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:53:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:53:59,541 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:53:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 12:53:59,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:53:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:53:59,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:53:59,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:53:59,783 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2023-12-02 12:53:59,783 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 1 case distinctions, treesize of input 12 treesize of output 10 [2023-12-02 12:53:59,797 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 10 treesize of output 8 [2023-12-02 12:53:59,821 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 11 [2023-12-02 12:53:59,875 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 20 treesize of output 15 [2023-12-02 12:54:00,450 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 12:54:00,451 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 22 treesize of output 18 [2023-12-02 12:54:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:00,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:04,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:04,248 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 28 treesize of output 29 [2023-12-02 12:54:04,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:04,365 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 40 [2023-12-02 12:54:04,489 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 5 [2023-12-02 12:54:05,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:54:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:05,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [931908911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:05,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345896091] [2023-12-02 12:54:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:05,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:05,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:05,680 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:05,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 12:54:05,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:05,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:05,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:54:05,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:05,828 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2023-12-02 12:54:05,828 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 1 case distinctions, treesize of input 12 treesize of output 10 [2023-12-02 12:54:05,842 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 10 treesize of output 8 [2023-12-02 12:54:05,863 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 11 [2023-12-02 12:54:05,911 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 20 treesize of output 15 [2023-12-02 12:54:06,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:06,289 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 37 treesize of output 33 [2023-12-02 12:54:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:06,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:08,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:08,819 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 28 treesize of output 29 [2023-12-02 12:54:08,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:08,981 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 40 [2023-12-02 12:54:09,017 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 5 [2023-12-02 12:54:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:54:09,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:54:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345896091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:09,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:54:09,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 11, 10, 9] total 28 [2023-12-02 12:54:09,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168035333] [2023-12-02 12:54:09,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:09,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 12:54:09,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 12:54:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-12-02 12:54:09,257 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:19,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:19,084 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2023-12-02 12:54:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 12:54:19,086 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 12:54:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:19,087 INFO L225 Difference]: With dead ends: 63 [2023-12-02 12:54:19,087 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 12:54:19,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=629, Invalid=1921, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 12:54:19,088 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 327 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:19,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 30 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 12:54:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 12:54:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2023-12-02 12:54:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-12-02 12:54:19,090 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2023-12-02 12:54:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:19,090 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-12-02 12:54:19,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-12-02 12:54:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 12:54:19,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:19,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:19,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 12:54:19,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2023-12-02 12:54:19,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Forceful destruction successful, exit code 0 [2023-12-02 12:54:19,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:54:19,691 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:54:19,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 63033642, now seen corresponding path program 2 times [2023-12-02 12:54:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637075825] [2023-12-02 12:54:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:19,692 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 12:54:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:19,693 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:54:19,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:54:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:19,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 12:54:19,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:19,827 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 7 treesize of output 6 [2023-12-02 12:54:19,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-02 12:54:19,882 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 11 [2023-12-02 12:54:20,555 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:54:20,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:54:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:20,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:26,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:26,465 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 122 treesize of output 122 [2023-12-02 12:54:26,560 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 41 treesize of output 37 [2023-12-02 12:54:26,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:26,775 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 84 treesize of output 82 [2023-12-02 12:54:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:28,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:54:28,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637075825] [2023-12-02 12:54:28,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637075825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:28,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171937776] [2023-12-02 12:54:28,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:28,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:28,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:54:28,094 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:54:28,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 12:54:28,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:28,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:28,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:54:28,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:28,291 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 7 treesize of output 6 [2023-12-02 12:54:28,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-02 12:54:28,340 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 11 [2023-12-02 12:54:29,417 INFO L349 Elim1Store]: treesize reduction 15, result has 57.1 percent of original size [2023-12-02 12:54:29,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 51 [2023-12-02 12:54:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:29,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:34,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:34,813 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 134 treesize of output 134 [2023-12-02 12:54:34,969 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 45 treesize of output 41 [2023-12-02 12:54:35,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:35,159 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 94 treesize of output 82 [2023-12-02 12:54:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171937776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609759272] [2023-12-02 12:54:37,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 12:54:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:54:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:54:37,136 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:54:37,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 12:54:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 12:54:37,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:37,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:54:37,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:37,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:54:37,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:54:37,333 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-02 12:54:38,367 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:54:38,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:54:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:38,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:54:40,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:40,809 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 122 treesize of output 122 [2023-12-02 12:54:40,887 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 41 treesize of output 37 [2023-12-02 12:54:41,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:41,162 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 84 treesize of output 82 [2023-12-02 12:54:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609759272] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:54:41,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:54:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 11, 11, 10] total 38 [2023-12-02 12:54:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124645501] [2023-12-02 12:54:41,954 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:54:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 12:54:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:54:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 12:54:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1186, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 12:54:41,955 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:54:57,329 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2023-12-02 12:54:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 12:54:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 12:54:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:54:57,331 INFO L225 Difference]: With dead ends: 63 [2023-12-02 12:54:57,331 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 12:54:57,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1197, Invalid=4353, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 12:54:57,333 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:54:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 39 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 12:54:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 12:54:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 12:54:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2023-12-02 12:54:57,335 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 25 [2023-12-02 12:54:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:54:57,335 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2023-12-02 12:54:57,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:54:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2023-12-02 12:54:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:54:57,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:54:57,336 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:54:57,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 12:54:57,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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)] Ended with exit code 0 [2023-12-02 12:54:57,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 12:54:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:54:57,936 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:54:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:54:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1308846790, now seen corresponding path program 3 times [2023-12-02 12:54:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:54:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155078186] [2023-12-02 12:54:57,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:54:57,937 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 12:54:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:54:57,938 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:54:57,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:54:58,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:54:58,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:54:58,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 12:54:58,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:54:58,212 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2023-12-02 12:54:58,212 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 1 case distinctions, treesize of input 12 treesize of output 10 [2023-12-02 12:54:58,225 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 10 treesize of output 8 [2023-12-02 12:54:58,255 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 11 [2023-12-02 12:54:58,313 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 20 treesize of output 15 [2023-12-02 12:54:59,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:54:59,057 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 37 treesize of output 33 [2023-12-02 12:54:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:54:59,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:05,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:05,895 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 28 treesize of output 29 [2023-12-02 12:55:05,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:05,948 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 40 [2023-12-02 12:55:06,012 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 5 [2023-12-02 12:55:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:55:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:55:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:06,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:55:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155078186] [2023-12-02 12:55:06,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155078186] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:55:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1529798051] [2023-12-02 12:55:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:55:06,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:55:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:55:06,754 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:55:06,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 12:55:07,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:55:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:55:07,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:55:07,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:07,533 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 10 treesize of output 8 [2023-12-02 12:55:07,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 13 [2023-12-02 12:55:07,802 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 11 [2023-12-02 12:55:08,096 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 26 [2023-12-02 12:55:11,271 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 12:55:11,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 22 [2023-12-02 12:55:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:11,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:27,498 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 109 treesize of output 103 [2023-12-02 12:55:31,202 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:55:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:55:31,213 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 12:55:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:31,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1529798051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:55:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248638232] [2023-12-02 12:55:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:55:31,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:55:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:55:31,215 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:55:31,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 12:55:31,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:55:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:55:31,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 12:55:31,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:55:31,587 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 10 treesize of output 8 [2023-12-02 12:55:31,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:55:31,621 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 11 [2023-12-02 12:55:31,673 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 20 treesize of output 15 [2023-12-02 12:55:34,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:34,234 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 37 treesize of output 33 [2023-12-02 12:55:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:35,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:55:49,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:49,405 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 28 treesize of output 29 [2023-12-02 12:55:49,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:55:49,546 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 40 [2023-12-02 12:55:49,655 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 5 [2023-12-02 12:55:51,943 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:55:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:55:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:55:51,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248638232] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:55:51,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:55:51,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 17, 14, 16, 15] total 68 [2023-12-02 12:55:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561412699] [2023-12-02 12:55:51,950 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:55:51,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-12-02 12:55:51,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:55:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-12-02 12:55:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3981, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 12:55:51,954 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 69 states, 68 states have (on average 3.176470588235294) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:56:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:44,865 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2023-12-02 12:56:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-02 12:56:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.176470588235294) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 12:56:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:44,866 INFO L225 Difference]: With dead ends: 123 [2023-12-02 12:56:44,866 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 12:56:44,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 81.9s TimeCoverageRelationStatistics Valid=2795, Invalid=10545, Unknown=0, NotChecked=0, Total=13340 [2023-12-02 12:56:44,872 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1134 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:44,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 46 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-12-02 12:56:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 12:56:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2023-12-02 12:56:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.2) internal successors, (102), 87 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:56:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2023-12-02 12:56:44,875 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 42 [2023-12-02 12:56:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:44,875 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2023-12-02 12:56:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.176470588235294) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:56:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2023-12-02 12:56:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:56:44,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:44,876 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:44,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 12:56:45,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:56:45,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 12:56:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:45,477 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-02 12:56:45,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:45,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2143249322, now seen corresponding path program 3 times [2023-12-02 12:56:45,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:56:45,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685876609] [2023-12-02 12:56:45,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:45,478 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 12:56:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:56:45,479 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:56:45,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/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 12:56:45,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:56:45,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:45,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 12:56:45,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:45,788 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 7 treesize of output 6 [2023-12-02 12:56:45,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2023-12-02 12:56:45,848 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 11 [2023-12-02 12:56:47,070 INFO L349 Elim1Store]: treesize reduction 15, result has 57.1 percent of original size [2023-12-02 12:56:47,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 51 [2023-12-02 12:56:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:47,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:57,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:56:57,176 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 134 treesize of output 134 [2023-12-02 12:56:57,237 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 45 treesize of output 41 [2023-12-02 12:56:57,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:56:57,505 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 94 treesize of output 82 [2023-12-02 12:56:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:56:58,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:56:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685876609] [2023-12-02 12:56:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685876609] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821616446] [2023-12-02 12:56:58,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:56:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:56:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:56:58,703 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:56:58,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c70c1e-c30a-4d29-9cd8-0e45c29b725b/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 12:56:59,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 12:56:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:56:59,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:56:59,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:59,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 6 [2023-12-02 12:56:59,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 1 [2023-12-02 12:56:59,854 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 11 [2023-12-02 12:58:05,357 INFO L349 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2023-12-02 12:58:05,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 67 [2023-12-02 12:58:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 12:58:06,833 INFO L327 TraceCheckSpWp]: Computing backward predicates...