./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test19.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_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/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_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test19.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/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_9423c733-fc72-4a1e-9c1a-284d5c56f599/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 7803e6cc268064256b2f537d6548202260755eda12a32948c0dafd94d7d212db --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:08:22,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:08:22,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:08:22,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:08:22,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:08:22,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:08:22,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:08:22,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:08:22,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:08:22,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:08:22,514 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:08:22,514 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:08:22,515 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:08:22,515 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:08:22,516 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:08:22,517 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:08:22,517 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:08:22,518 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:08:22,518 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:08:22,519 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:08:22,519 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:08:22,524 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:08:22,524 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:08:22,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:08:22,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:08:22,526 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:08:22,526 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:08:22,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:08:22,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:08:22,527 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:08:22,528 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:08:22,529 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:08:22,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:08:22,530 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:08:22,531 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:08:22,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:08:22,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:08:22,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:08:22,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:08:22,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:08:22,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:08:22,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:08:22,533 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:08:22,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:08:22,534 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:08:22,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:08:22,535 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_9423c733-fc72-4a1e-9c1a-284d5c56f599/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7803e6cc268064256b2f537d6548202260755eda12a32948c0dafd94d7d212db [2023-11-06 21:08:22,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:08:22,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:08:22,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:08:22,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:08:22,838 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:08:22,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-regression/test19.c [2023-11-06 21:08:26,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:08:26,373 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:08:26,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/sv-benchmarks/c/ldv-regression/test19.c [2023-11-06 21:08:26,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/data/cd587be61/1b54226821ee4b209e79c76584828955/FLAGe4d9265ad [2023-11-06 21:08:26,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/data/cd587be61/1b54226821ee4b209e79c76584828955 [2023-11-06 21:08:26,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:08:26,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:08:26,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:08:26,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:08:26,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:08:26,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8cce0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26, skipping insertion in model container [2023-11-06 21:08:26,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:08:26,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:08:26,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:08:26,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:08:26,645 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:08:26,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26 WrapperNode [2023-11-06 21:08:26,646 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:08:26,647 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:08:26,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:08:26,648 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:08:26,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,674 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,708 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-06 21:08:26,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:08:26,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:08:26,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:08:26,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:08:26,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,726 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,742 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:08:26,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:08:26,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:08:26,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:08:26,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:08:26,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:26,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:08:26,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:08:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:08:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:08:26,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:08:26,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:08:26,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:08:26,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:08:26,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:08:26,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:08:26,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:08:26,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:08:26,979 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:08:26,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:08:27,315 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:08:27,374 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:08:27,374 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 21:08:27,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:27 BoogieIcfgContainer [2023-11-06 21:08:27,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:08:27,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:08:27,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:08:27,388 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:08:27,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:08:26" (1/3) ... [2023-11-06 21:08:27,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc19d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:27, skipping insertion in model container [2023-11-06 21:08:27,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (2/3) ... [2023-11-06 21:08:27,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc19d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:27, skipping insertion in model container [2023-11-06 21:08:27,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:27" (3/3) ... [2023-11-06 21:08:27,402 INFO L112 eAbstractionObserver]: Analyzing ICFG test19.c [2023-11-06 21:08:27,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:08:27,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-06 21:08:27,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:08:27,495 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;@64aacb85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:08:27,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-11-06 21:08:27,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 10 states have (on average 2.5) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:08:27,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:27,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:08:27,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:27,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2391, now seen corresponding path program 1 times [2023-11-06 21:08:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:27,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692334684] [2023-11-06 21:08:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:27,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:27,953 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 21:08:27,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692334684] [2023-11-06 21:08:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692334684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:27,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:27,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:08:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267150553] [2023-11-06 21:08:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:27,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:27,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:27,998 INFO L87 Difference]: Start difference. First operand has 25 states, 10 states have (on average 2.5) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 21:08:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:28,051 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2023-11-06 21:08:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:28,053 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 21:08:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:28,062 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:08:28,062 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:08:28,064 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 21:08:28,068 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:28,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:08:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:08:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 2.2) internal successors, (22), 22 states have internal predecessors, (22), 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 21:08:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2023-11-06 21:08:28,103 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 2 [2023-11-06 21:08:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:28,104 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2023-11-06 21:08:28,104 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 21:08:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2023-11-06 21:08:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:08:28,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:28,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:08:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:08:28,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:28,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2392, now seen corresponding path program 1 times [2023-11-06 21:08:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:28,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974796457] [2023-11-06 21:08:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:28,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:28,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:28,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974796457] [2023-11-06 21:08:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974796457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:28,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:08:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496650567] [2023-11-06 21:08:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:28,434 INFO L87 Difference]: Start difference. First operand 23 states and 22 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 21:08:28,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:28,465 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2023-11-06 21:08:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:28,465 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 21:08:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:28,466 INFO L225 Difference]: With dead ends: 22 [2023-11-06 21:08:28,467 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 21:08:28,467 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 21:08:28,469 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:28,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 21:08:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-06 21:08:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 2.1) internal successors, (21), 21 states have internal predecessors, (21), 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 21:08:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2023-11-06 21:08:28,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 2 [2023-11-06 21:08:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:28,475 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2023-11-06 21:08:28,475 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 21:08:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2023-11-06 21:08:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:08:28,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:28,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:08:28,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:08:28,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:28,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 75369, now seen corresponding path program 1 times [2023-11-06 21:08:28,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735371552] [2023-11-06 21:08:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:28,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:28,560 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 21:08:28,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:28,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735371552] [2023-11-06 21:08:28,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735371552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:28,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:08:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691672549] [2023-11-06 21:08:28,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:28,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:28,567 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:28,613 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2023-11-06 21:08:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:28,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:08:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:28,621 INFO L225 Difference]: With dead ends: 21 [2023-11-06 21:08:28,621 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 21:08:28,622 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 21:08:28,630 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:28,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 21:08:28,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 21:08:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 2.0) internal successors, (20), 20 states have internal predecessors, (20), 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 21:08:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2023-11-06 21:08:28,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 3 [2023-11-06 21:08:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:28,644 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2023-11-06 21:08:28,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2023-11-06 21:08:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:08:28,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:28,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:08:28,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:08:28,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:28,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash 75370, now seen corresponding path program 1 times [2023-11-06 21:08:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714704330] [2023-11-06 21:08:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:28,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:28,841 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 21:08:28,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:28,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714704330] [2023-11-06 21:08:28,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714704330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:28,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:28,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:08:28,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135605235] [2023-11-06 21:08:28,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:28,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:28,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:28,845 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:28,885 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2023-11-06 21:08:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:08:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:28,886 INFO L225 Difference]: With dead ends: 20 [2023-11-06 21:08:28,887 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 21:08:28,887 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 21:08:28,888 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:28,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 21:08:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 21:08:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 10 states have (on average 1.9) internal successors, (19), 19 states have internal predecessors, (19), 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 21:08:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2023-11-06 21:08:28,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 3 [2023-11-06 21:08:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:28,893 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2023-11-06 21:08:28,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2023-11-06 21:08:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:08:28,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:28,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:08:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:08:28,894 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:28,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2337505, now seen corresponding path program 1 times [2023-11-06 21:08:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104711978] [2023-11-06 21:08:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:28,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:29,071 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 21:08:29,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104711978] [2023-11-06 21:08:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104711978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827782347] [2023-11-06 21:08:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:29,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:08:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:08:29,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:29,074 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:29,123 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2023-11-06 21:08:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:08:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:29,125 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:08:29,125 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 21:08:29,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:29,127 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:29,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 21:08:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 21:08:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.8) internal successors, (18), 18 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2023-11-06 21:08:29,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 4 [2023-11-06 21:08:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:29,131 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2023-11-06 21:08:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2023-11-06 21:08:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:08:29,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:29,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:08:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:08:29,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:29,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2337506, now seen corresponding path program 1 times [2023-11-06 21:08:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580969985] [2023-11-06 21:08:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:29,351 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 21:08:29,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:29,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580969985] [2023-11-06 21:08:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580969985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:29,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:29,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:29,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886184141] [2023-11-06 21:08:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:08:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:08:29,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:29,360 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:29,407 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2023-11-06 21:08:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:08:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:29,408 INFO L225 Difference]: With dead ends: 18 [2023-11-06 21:08:29,408 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 21:08:29,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:29,410 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:29,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 21:08:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 21:08:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.7) internal successors, (17), 17 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2023-11-06 21:08:29,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 4 [2023-11-06 21:08:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:29,415 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2023-11-06 21:08:29,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 21:08:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2023-11-06 21:08:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:08:29,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:29,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:08:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:08:29,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:29,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 72462640, now seen corresponding path program 1 times [2023-11-06 21:08:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2210849] [2023-11-06 21:08:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:29,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,081 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 21:08:30,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2210849] [2023-11-06 21:08:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2210849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:30,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:30,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016429319] [2023-11-06 21:08:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:08:30,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:08:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:30,084 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:30,140 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2023-11-06 21:08:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:08:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:08:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:30,141 INFO L225 Difference]: With dead ends: 17 [2023-11-06 21:08:30,142 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 21:08:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:30,143 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:30,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 21:08:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 21:08:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2023-11-06 21:08:30,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 5 [2023-11-06 21:08:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:30,151 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2023-11-06 21:08:30,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2023-11-06 21:08:30,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:08:30,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:30,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:08:30,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:08:30,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:30,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash 72462639, now seen corresponding path program 1 times [2023-11-06 21:08:30,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:30,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835446578] [2023-11-06 21:08:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,382 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 21:08:30,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835446578] [2023-11-06 21:08:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835446578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:30,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:08:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839624355] [2023-11-06 21:08:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:08:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:08:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:08:30,385 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:30,491 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2023-11-06 21:08:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:08:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:08:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:30,492 INFO L225 Difference]: With dead ends: 16 [2023-11-06 21:08:30,493 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:08:30,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:08:30,494 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:30,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:08:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-06 21:08:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 15 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2023-11-06 21:08:30,497 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 5 [2023-11-06 21:08:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:30,498 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2023-11-06 21:08:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2023-11-06 21:08:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:08:30,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:30,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:08:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:08:30,499 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:30,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2048624474, now seen corresponding path program 1 times [2023-11-06 21:08:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119542003] [2023-11-06 21:08:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,656 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 21:08:30,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119542003] [2023-11-06 21:08:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119542003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:30,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010128978] [2023-11-06 21:08:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:30,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:30,660 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:30,689 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2023-11-06 21:08:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:08:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:30,691 INFO L225 Difference]: With dead ends: 15 [2023-11-06 21:08:30,691 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 21:08:30,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:30,692 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 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 21:08:30,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 21:08:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 21:08:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 14 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2023-11-06 21:08:30,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 6 [2023-11-06 21:08:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:30,696 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2023-11-06 21:08:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2023-11-06 21:08:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:08:30,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:30,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:08:30,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:08:30,697 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:30,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2048624473, now seen corresponding path program 1 times [2023-11-06 21:08:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:30,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925386670] [2023-11-06 21:08:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,829 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 21:08:30,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925386670] [2023-11-06 21:08:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925386670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:08:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669237877] [2023-11-06 21:08:30,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:30,834 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:30,853 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2023-11-06 21:08:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:08:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:30,854 INFO L225 Difference]: With dead ends: 14 [2023-11-06 21:08:30,855 INFO L226 Difference]: Without dead ends: 14 [2023-11-06 21:08:30,855 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 21:08:30,856 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:30,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-06 21:08:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-06 21:08:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 13 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2023-11-06 21:08:30,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 6 [2023-11-06 21:08:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:30,862 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2023-11-06 21:08:30,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2023-11-06 21:08:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:08:30,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:30,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:08:30,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:30,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash 917150739, now seen corresponding path program 1 times [2023-11-06 21:08:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247836051] [2023-11-06 21:08:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,982 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 21:08:30,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247836051] [2023-11-06 21:08:30,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247836051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:30,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:30,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303483402] [2023-11-06 21:08:30,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:30,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:30,985 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:31,040 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2023-11-06 21:08:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:08:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:08:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:31,042 INFO L225 Difference]: With dead ends: 13 [2023-11-06 21:08:31,042 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 21:08:31,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:08:31,043 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:31,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 21:08:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 21:08:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2023-11-06 21:08:31,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 7 [2023-11-06 21:08:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:31,053 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2023-11-06 21:08:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2023-11-06 21:08:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:08:31,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:31,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:31,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:08:31,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:31,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash 917150740, now seen corresponding path program 1 times [2023-11-06 21:08:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:31,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294322996] [2023-11-06 21:08:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:31,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:31,256 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 21:08:31,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294322996] [2023-11-06 21:08:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294322996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:08:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674041911] [2023-11-06 21:08:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:08:31,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:08:31,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:08:31,261 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:31,326 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2023-11-06 21:08:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:08:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:08:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:31,328 INFO L225 Difference]: With dead ends: 12 [2023-11-06 21:08:31,328 INFO L226 Difference]: Without dead ends: 12 [2023-11-06 21:08:31,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:08:31,330 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:31,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 7 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-06 21:08:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-06 21:08:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2023-11-06 21:08:31,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 7 [2023-11-06 21:08:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:31,334 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2023-11-06 21:08:31,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2023-11-06 21:08:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:08:31,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:31,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:08:31,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:31,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash 913564966, now seen corresponding path program 1 times [2023-11-06 21:08:31,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:31,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675635555] [2023-11-06 21:08:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:31,782 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 21:08:31,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:31,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675635555] [2023-11-06 21:08:31,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675635555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:31,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:31,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:08:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621444279] [2023-11-06 21:08:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:31,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:08:31,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:08:31,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:08:31,785 INFO L87 Difference]: Start difference. First operand 12 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:31,974 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2023-11-06 21:08:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:08:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:08:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:31,976 INFO L225 Difference]: With dead ends: 10 [2023-11-06 21:08:31,976 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 21:08:31,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:08:31,977 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:31,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 21:08:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 21:08:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2023-11-06 21:08:31,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2023-11-06 21:08:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:31,980 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2023-11-06 21:08:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2023-11-06 21:08:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:08:31,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:31,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:31,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:08:31,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2023-11-06 21:08:31,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:31,982 INFO L85 PathProgramCache]: Analyzing trace with hash 913564506, now seen corresponding path program 1 times [2023-11-06 21:08:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338076459] [2023-11-06 21:08:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:31,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:32,386 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 21:08:32,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:32,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338076459] [2023-11-06 21:08:32,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338076459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:32,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:32,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618718890] [2023-11-06 21:08:32,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:32,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:08:32,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:08:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:32,389 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:32,417 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2023-11-06 21:08:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:08:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:08:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:32,418 INFO L225 Difference]: With dead ends: 9 [2023-11-06 21:08:32,418 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 21:08:32,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:08:32,419 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:32,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 21:08:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 21:08:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 21:08:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 21:08:32,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2023-11-06 21:08:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:32,422 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 21:08:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 21:08:32,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 21:08:32,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2023-11-06 21:08:32,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2023-11-06 21:08:32,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-11-06 21:08:32,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-11-06 21:08:32,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-11-06 21:08:32,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-11-06 21:08:32,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-11-06 21:08:32,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-11-06 21:08:32,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-11-06 21:08:32,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-11-06 21:08:32,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2023-11-06 21:08:32,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2023-11-06 21:08:32,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2023-11-06 21:08:32,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2023-11-06 21:08:32,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:08:32,433 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:32,438 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:08:32,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:08:32 BoogieIcfgContainer [2023-11-06 21:08:32,443 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:08:32,443 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:08:32,443 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:08:32,444 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:08:32,444 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:27" (3/4) ... [2023-11-06 21:08:32,446 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 21:08:32,457 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-11-06 21:08:32,458 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-06 21:08:32,458 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 21:08:32,458 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 21:08:32,522 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 21:08:32,522 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/witness.graphml.yaml [2023-11-06 21:08:32,522 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:08:32,523 INFO L158 Benchmark]: Toolchain (without parser) took 6115.90ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 109.5MB in the beginning and 107.7MB in the end (delta: 1.8MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,523 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 104.9MB. Free memory is still 54.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:08:32,524 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.77ms. Allocated memory is still 151.0MB. Free memory was 109.1MB in the beginning and 98.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.61ms. Allocated memory is still 151.0MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,525 INFO L158 Benchmark]: Boogie Preprocessor took 37.68ms. Allocated memory is still 151.0MB. Free memory was 97.3MB in the beginning and 96.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,526 INFO L158 Benchmark]: RCFGBuilder took 629.27ms. Allocated memory is still 151.0MB. Free memory was 96.0MB in the beginning and 122.2MB in the end (delta: -26.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,527 INFO L158 Benchmark]: TraceAbstraction took 5059.34ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 122.2MB in the beginning and 110.8MB in the end (delta: 11.4MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,527 INFO L158 Benchmark]: Witness Printer took 79.17ms. Allocated memory is still 203.4MB. Free memory was 110.8MB in the beginning and 107.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,530 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 104.9MB. Free memory is still 54.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.77ms. Allocated memory is still 151.0MB. Free memory was 109.1MB in the beginning and 98.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.61ms. Allocated memory is still 151.0MB. Free memory was 98.9MB in the beginning and 97.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.68ms. Allocated memory is still 151.0MB. Free memory was 97.3MB in the beginning and 96.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 629.27ms. Allocated memory is still 151.0MB. Free memory was 96.0MB in the beginning and 122.2MB in the end (delta: -26.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5059.34ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 122.2MB in the beginning and 110.8MB in the end (delta: 11.4MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. * Witness Printer took 79.17ms. Allocated memory is still 203.4MB. Free memory was 110.8MB in the beginning and 107.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 3]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 106 mSDsluCounter, 166 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 71 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 315 IncrementalHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 95 mSDtfsCounter, 315 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 851 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 21:08:32,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9423c733-fc72-4a1e-9c1a-284d5c56f599/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE