./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test22-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test22-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1ce1c36cc17bb5fac8e93fbe54fbc2a77334d62ad40c06c722f9da96af2516f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:06:40,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:06:40,563 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:06:40,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:06:40,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:06:40,617 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:06:40,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:06:40,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:06:40,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:06:40,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:06:40,626 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:06:40,627 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:06:40,627 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:06:40,629 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:06:40,630 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:06:40,630 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:06:40,631 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:06:40,631 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:06:40,632 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:06:40,632 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:06:40,633 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:06:40,633 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:06:40,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:06:40,635 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:06:40,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:06:40,636 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:06:40,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:06:40,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:06:40,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:06:40,638 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:06:40,640 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:06:40,640 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:06:40,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:06:40,641 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:06:40,641 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:06:40,642 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:06:40,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:06:40,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:06:40,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:06:40,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:40,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:06:40,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:06:40,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:06:40,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:06:40,645 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:06:40,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:06:40,646 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_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1ce1c36cc17bb5fac8e93fbe54fbc2a77334d62ad40c06c722f9da96af2516f [2023-11-06 21:06:41,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:06:41,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:06:41,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:06:41,046 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:06:41,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:06:41,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-regression/test22-1.c [2023-11-06 21:06:44,271 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:06:44,477 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:06:44,478 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/sv-benchmarks/c/ldv-regression/test22-1.c [2023-11-06 21:06:44,486 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/data/5c0e26198/9b8cf4334a394e7d8accde5234fd720b/FLAGe8ad659a7 [2023-11-06 21:06:44,499 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/data/5c0e26198/9b8cf4334a394e7d8accde5234fd720b [2023-11-06 21:06:44,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:06:44,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:06:44,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:44,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:06:44,522 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:06:44,523 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f82e8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44, skipping insertion in model container [2023-11-06 21:06:44,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,551 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:06:44,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:44,752 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:06:44,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:44,798 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:06:44,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44 WrapperNode [2023-11-06 21:06:44,798 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:44,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:44,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:06:44,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:06:44,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,847 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 91 [2023-11-06 21:06:44,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:44,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:06:44,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:06:44,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:06:44,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,862 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,862 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:06:44,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:06:44,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:06:44,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:06:44,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (1/1) ... [2023-11-06 21:06:44,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:44,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:06:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:06:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:06:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:06:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2023-11-06 21:06:44,980 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2023-11-06 21:06:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:06:44,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:06:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:06:44,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:06:45,067 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:06:45,070 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:06:45,360 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:06:45,432 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:06:45,432 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:06:45,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:45 BoogieIcfgContainer [2023-11-06 21:06:45,435 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:06:45,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:06:45,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:06:45,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:06:45,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:06:44" (1/3) ... [2023-11-06 21:06:45,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d615aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:45, skipping insertion in model container [2023-11-06 21:06:45,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:44" (2/3) ... [2023-11-06 21:06:45,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d615aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:45, skipping insertion in model container [2023-11-06 21:06:45,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:45" (3/3) ... [2023-11-06 21:06:45,446 INFO L112 eAbstractionObserver]: Analyzing ICFG test22-1.c [2023-11-06 21:06:45,467 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:06:45,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 21:06:45,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:06:45,557 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;@2ae65563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:06:45,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-06 21:06:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:06:45,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:45,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:06:45,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:06:45,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 4067, now seen corresponding path program 1 times [2023-11-06 21:06:45,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:45,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328687059] [2023-11-06 21:06:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:45,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:45,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328687059] [2023-11-06 21:06:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328687059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:45,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:45,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:06:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786866780] [2023-11-06 21:06:45,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:45,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,001 INFO L87 Difference]: Start difference. First operand has 44 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.0) 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) [2023-11-06 21:06:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:46,105 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2023-11-06 21:06:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:46,108 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 [2023-11-06 21:06:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:46,115 INFO L225 Difference]: With dead ends: 42 [2023-11-06 21:06:46,115 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 21:06:46,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,121 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:46,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:06:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 21:06:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-06 21:06:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-06 21:06:46,163 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 2 [2023-11-06 21:06:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:46,163 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-06 21:06:46,164 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) [2023-11-06 21:06:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-06 21:06:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:06:46,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:46,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:06:46,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:06:46,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:06:46,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 4068, now seen corresponding path program 1 times [2023-11-06 21:06:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197093299] [2023-11-06 21:06:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:46,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:46,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197093299] [2023-11-06 21:06:46,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197093299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:46,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:46,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:06:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707923458] [2023-11-06 21:06:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:46,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:46,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:46,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,303 INFO L87 Difference]: Start difference. First operand 41 states and 45 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) [2023-11-06 21:06:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:46,344 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-11-06 21:06:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:46,345 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 [2023-11-06 21:06:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:46,346 INFO L225 Difference]: With dead ends: 39 [2023-11-06 21:06:46,346 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 21:06:46,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,348 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:46,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 21:06:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-06 21:06:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-06 21:06:46,357 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 2 [2023-11-06 21:06:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:46,357 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-06 21:06:46,357 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) [2023-11-06 21:06:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-06 21:06:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:06:46,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:46,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:06:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:06:46,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:06:46,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 4006454, now seen corresponding path program 1 times [2023-11-06 21:06:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145149545] [2023-11-06 21:06:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:46,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145149545] [2023-11-06 21:06:46,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145149545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:46,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:46,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:06:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626117223] [2023-11-06 21:06:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,544 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-06 21:06:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:46,596 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-06 21:06:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:46,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2023-11-06 21:06:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:46,597 INFO L225 Difference]: With dead ends: 37 [2023-11-06 21:06:46,598 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 21:06:46,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,600 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 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 [2023-11-06 21:06:46,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 21:06:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 21:06:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-06 21:06:46,607 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 4 [2023-11-06 21:06:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:46,608 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-06 21:06:46,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-06 21:06:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-06 21:06:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:06:46,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:46,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:06:46,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:06:46,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:06:46,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 4006455, now seen corresponding path program 1 times [2023-11-06 21:06:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505432207] [2023-11-06 21:06:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:46,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:46,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505432207] [2023-11-06 21:06:46,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505432207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:46,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:46,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:06:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379206558] [2023-11-06 21:06:46,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:46,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:46,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:46,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,771 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-06 21:06:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:46,802 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-11-06 21:06:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2023-11-06 21:06:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:46,804 INFO L225 Difference]: With dead ends: 35 [2023-11-06 21:06:46,804 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 21:06:46,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:46,807 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:46,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 21:06:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-06 21:06:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-06 21:06:46,815 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 4 [2023-11-06 21:06:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:46,815 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-06 21:06:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2023-11-06 21:06:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-06 21:06:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:06:46,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:46,817 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:06:46,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:06:46,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2010328972, now seen corresponding path program 1 times [2023-11-06 21:06:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468621166] [2023-11-06 21:06:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:46,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:06:47,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:47,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468621166] [2023-11-06 21:06:47,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468621166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:47,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118972589] [2023-11-06 21:06:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:47,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:47,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:47,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:06:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:47,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:06:47,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:06:47,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:06:48,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118972589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:48,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839188738] [2023-11-06 21:06:48,179 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:06:48,179 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:48,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:48,191 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:48,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:51,600 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 15 for LOIs [2023-11-06 21:06:51,613 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:58,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [839188738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:58,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:58,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 5, 8] total 31 [2023-11-06 21:06:58,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592102274] [2023-11-06 21:06:58,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:58,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:06:58,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:06:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=777, Unknown=6, NotChecked=0, Total=992 [2023-11-06 21:06:58,359 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 16 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:59,889 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-11-06 21:06:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:06:59,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-06 21:06:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:59,893 INFO L225 Difference]: With dead ends: 31 [2023-11-06 21:06:59,894 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 21:06:59,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=209, Invalid=777, Unknown=6, NotChecked=0, Total=992 [2023-11-06 21:06:59,901 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:59,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 7 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:06:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 21:06:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-06 21:06:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-06 21:06:59,917 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2023-11-06 21:06:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:59,919 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-06 21:06:59,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.0) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:06:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-06 21:06:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:06:59,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:59,921 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:59,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:07:00,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:00,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:07:00,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:00,136 INFO L85 PathProgramCache]: Analyzing trace with hash -808951554, now seen corresponding path program 1 times [2023-11-06 21:07:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:00,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213767860] [2023-11-06 21:07:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:00,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:00,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:00,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213767860] [2023-11-06 21:07:00,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213767860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:00,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:00,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:07:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39294509] [2023-11-06 21:07:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:00,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:07:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:07:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:07:00,182 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:00,209 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-11-06 21:07:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:07:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-06 21:07:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:00,210 INFO L225 Difference]: With dead ends: 29 [2023-11-06 21:07:00,210 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:07:00,211 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 [2023-11-06 21:07:00,212 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:00,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:07:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:07:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 21:07:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.263157894736842) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:07:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-06 21:07:00,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2023-11-06 21:07:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:00,217 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-06 21:07:00,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-06 21:07:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:07:00,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:00,219 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:00,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:07:00,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:07:00,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 688318991, now seen corresponding path program 1 times [2023-11-06 21:07:00,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:00,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760963677] [2023-11-06 21:07:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:00,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:00,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760963677] [2023-11-06 21:07:00,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760963677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:00,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:00,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:07:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836712002] [2023-11-06 21:07:00,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:07:00,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:07:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:07:00,342 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:00,396 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-06 21:07:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:07:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-06 21:07:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:00,397 INFO L225 Difference]: With dead ends: 27 [2023-11-06 21:07:00,397 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 21:07:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:07:00,399 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:07:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 21:07:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 21:07:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:07:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-11-06 21:07:00,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2023-11-06 21:07:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:00,404 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-11-06 21:07:00,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-11-06 21:07:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:07:00,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:00,405 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:00,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:07:00,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:07:00,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash 688318992, now seen corresponding path program 1 times [2023-11-06 21:07:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:00,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274212386] [2023-11-06 21:07:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:00,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:00,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:00,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274212386] [2023-11-06 21:07:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274212386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:00,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:07:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580025755] [2023-11-06 21:07:00,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:07:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:07:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:07:00,615 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:00,684 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2023-11-06 21:07:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:07:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-06 21:07:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:00,686 INFO L225 Difference]: With dead ends: 26 [2023-11-06 21:07:00,686 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:07:00,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:07:00,687 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:00,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:07:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:07:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 21:07:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:07:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-06 21:07:00,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2023-11-06 21:07:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-06 21:07:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-06 21:07:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:07:00,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:00,694 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:00,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:07:00,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:07:00,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1537214796, now seen corresponding path program 1 times [2023-11-06 21:07:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:00,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406271876] [2023-11-06 21:07:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:00,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406271876] [2023-11-06 21:07:00,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406271876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:07:00,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:07:00,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:07:00,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187700017] [2023-11-06 21:07:00,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:07:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:07:00,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:07:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:07:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:07:00,946 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:07:01,050 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-11-06 21:07:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:07:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-06 21:07:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:07:01,051 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:07:01,051 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:07:01,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:07:01,052 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:07:01,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 40 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:07:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:07:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 21:07:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:07:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-06 21:07:01,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2023-11-06 21:07:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:07:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-06 21:07:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:07:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-06 21:07:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:07:01,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:07:01,061 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:07:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:07:01,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-11-06 21:07:01,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:07:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash -203818221, now seen corresponding path program 1 times [2023-11-06 21:07:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:07:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468790086] [2023-11-06 21:07:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:07:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:01,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:07:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468790086] [2023-11-06 21:07:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468790086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:07:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20820295] [2023-11-06 21:07:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:07:01,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:07:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:07:01,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:07:01,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_909c1aa2-54d1-4c3c-9e7d-ad81030b46cc/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:07:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:07:01,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:07:01,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:07:01,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:07:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:01,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:07:01,755 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-06 21:07:01,755 INFO L351 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 13 treesize of output 13 [2023-11-06 21:07:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:07:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20820295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:07:01,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1748688189] [2023-11-06 21:07:01,790 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-06 21:07:01,790 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:07:01,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:07:01,791 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:07:01,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:07:06,005 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 15 for LOIs [2023-11-06 21:07:06,014 INFO L180 IcfgInterpreter]: Interpretation finished