./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:41,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:41,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:57:41,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:41,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:41,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:41,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:41,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:41,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:41,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:41,286 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:41,287 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:41,288 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:41,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:41,290 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:41,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:41,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:41,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:41,293 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:57:41,294 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:57:41,295 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:57:41,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:41,296 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:57:41,297 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:57:41,298 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:41,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:41,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:41,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:41,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:41,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:41,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:41,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:41,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:41,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:41,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:41,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:41,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:41,307 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:41,307 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2023-11-06 21:57:41,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:41,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:41,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:41,717 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:41,718 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:41,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/memsafety/test-0217.i [2023-11-06 21:57:45,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:45,770 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:45,774 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/sv-benchmarks/c/memsafety/test-0217.i [2023-11-06 21:57:45,810 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/data/14ace6daa/87cf24421c274e18b3779a694b6ca8b4/FLAGb465809d4 [2023-11-06 21:57:45,835 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/data/14ace6daa/87cf24421c274e18b3779a694b6ca8b4 [2023-11-06 21:57:45,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:45,848 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:45,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:45,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:45,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:45,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e466113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45, skipping insertion in model container [2023-11-06 21:57:45,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:46,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:46,515 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:46,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:46,697 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:46,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46 WrapperNode [2023-11-06 21:57:46,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:46,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:46,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:46,701 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:46,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,806 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 215 [2023-11-06 21:57:46,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:46,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:46,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:46,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:46,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:46,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:46,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:46,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:46,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (1/1) ... [2023-11-06 21:57:46,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:46,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:46,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-11-06 21:57:46,981 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-11-06 21:57:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:57:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:57:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:57:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:57:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:57:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:57:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:47,209 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:47,213 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:47,946 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:47,955 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:47,959 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 21:57:47,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:47 BoogieIcfgContainer [2023-11-06 21:57:47,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:47,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:47,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:47,978 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:47,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:45" (1/3) ... [2023-11-06 21:57:47,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348ba8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:47, skipping insertion in model container [2023-11-06 21:57:47,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:46" (2/3) ... [2023-11-06 21:57:47,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348ba8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:47, skipping insertion in model container [2023-11-06 21:57:47,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:47" (3/3) ... [2023-11-06 21:57:47,986 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2023-11-06 21:57:48,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:48,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-11-06 21:57:48,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:48,087 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=PETRI_NET, 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;@62e171c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:48,088 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-11-06 21:57:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:57:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:57:48,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:48,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:57:48,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:48,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1074518762, now seen corresponding path program 1 times [2023-11-06 21:57:48,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852027349] [2023-11-06 21:57:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:48,316 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 21:57:48,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:48,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852027349] [2023-11-06 21:57:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852027349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:48,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:48,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714592962] [2023-11-06 21:57:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:57:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:57:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:48,374 INFO L87 Difference]: Start difference. First operand has 167 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 163 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 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 21:57:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:48,415 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2023-11-06 21:57:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:57:48,418 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 21:57:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:48,436 INFO L225 Difference]: With dead ends: 167 [2023-11-06 21:57:48,437 INFO L226 Difference]: Without dead ends: 165 [2023-11-06 21:57:48,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:57:48,450 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:48,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-06 21:57:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-06 21:57:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 95 states have (on average 1.894736842105263) internal successors, (180), 161 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:57:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 184 transitions. [2023-11-06 21:57:48,549 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 184 transitions. Word has length 6 [2023-11-06 21:57:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:48,550 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 184 transitions. [2023-11-06 21:57:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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 21:57:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 184 transitions. [2023-11-06 21:57:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:57:48,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:48,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:48,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:57:48,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:48,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331232, now seen corresponding path program 1 times [2023-11-06 21:57:48,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:48,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8849822] [2023-11-06 21:57:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:48,777 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 21:57:48,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:48,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8849822] [2023-11-06 21:57:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8849822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:48,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:57:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085572782] [2023-11-06 21:57:48,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:48,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:48,783 INFO L87 Difference]: Start difference. First operand 165 states and 184 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 21:57:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:49,105 INFO L93 Difference]: Finished difference Result 321 states and 358 transitions. [2023-11-06 21:57:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 21:57:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:49,113 INFO L225 Difference]: With dead ends: 321 [2023-11-06 21:57:49,114 INFO L226 Difference]: Without dead ends: 321 [2023-11-06 21:57:49,119 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 21:57:49,122 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 165 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:49,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 235 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-06 21:57:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 229. [2023-11-06 21:57:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.8717948717948718) internal successors, (292), 222 states have internal predecessors, (292), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:57:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 300 transitions. [2023-11-06 21:57:49,166 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 300 transitions. Word has length 7 [2023-11-06 21:57:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 300 transitions. [2023-11-06 21:57:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 21:57:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 300 transitions. [2023-11-06 21:57:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:57:49,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:49,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:49,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:57:49,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:49,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331231, now seen corresponding path program 1 times [2023-11-06 21:57:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073430482] [2023-11-06 21:57:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:49,415 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 21:57:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073430482] [2023-11-06 21:57:49,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073430482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:49,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879924148] [2023-11-06 21:57:49,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:49,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:49,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:49,422 INFO L87 Difference]: Start difference. First operand 229 states and 300 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:49,724 INFO L93 Difference]: Finished difference Result 368 states and 462 transitions. [2023-11-06 21:57:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:57:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:49,728 INFO L225 Difference]: With dead ends: 368 [2023-11-06 21:57:49,728 INFO L226 Difference]: Without dead ends: 368 [2023-11-06 21:57:49,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:49,730 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 134 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:49,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 353 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-06 21:57:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 302. [2023-11-06 21:57:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:57:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-11-06 21:57:49,774 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-11-06 21:57:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:49,775 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-11-06 21:57:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-11-06 21:57:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:57:49,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:49,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:49,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:57:49,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:49,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:49,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1280331169, now seen corresponding path program 1 times [2023-11-06 21:57:49,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:49,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897475202] [2023-11-06 21:57:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:57:49,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:49,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897475202] [2023-11-06 21:57:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897475202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992803409] [2023-11-06 21:57:49,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:49,897 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:50,145 INFO L93 Difference]: Finished difference Result 367 states and 460 transitions. [2023-11-06 21:57:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:57:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:50,150 INFO L225 Difference]: With dead ends: 367 [2023-11-06 21:57:50,150 INFO L226 Difference]: Without dead ends: 367 [2023-11-06 21:57:50,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:50,159 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 116 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:50,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 367 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-06 21:57:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 302. [2023-11-06 21:57:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 223 states have (on average 1.8340807174887892) internal successors, (409), 291 states have internal predecessors, (409), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:57:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 425 transitions. [2023-11-06 21:57:50,204 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 425 transitions. Word has length 7 [2023-11-06 21:57:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:50,204 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 425 transitions. [2023-11-06 21:57:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 425 transitions. [2023-11-06 21:57:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:57:50,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:50,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:50,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:57:50,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:50,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1257058894, now seen corresponding path program 1 times [2023-11-06 21:57:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033860797] [2023-11-06 21:57:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:50,504 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 21:57:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033860797] [2023-11-06 21:57:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033860797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:50,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:50,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:57:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970778877] [2023-11-06 21:57:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:50,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:57:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:57:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:57:50,513 INFO L87 Difference]: Start difference. First operand 302 states and 425 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:50,868 INFO L93 Difference]: Finished difference Result 449 states and 603 transitions. [2023-11-06 21:57:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:57:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:57:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:50,875 INFO L225 Difference]: With dead ends: 449 [2023-11-06 21:57:50,875 INFO L226 Difference]: Without dead ends: 449 [2023-11-06 21:57:50,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:50,877 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 139 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:50,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 765 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-06 21:57:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 344. [2023-11-06 21:57:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.816793893129771) internal successors, (476), 331 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 496 transitions. [2023-11-06 21:57:50,910 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 496 transitions. Word has length 10 [2023-11-06 21:57:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:50,911 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 496 transitions. [2023-11-06 21:57:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 496 transitions. [2023-11-06 21:57:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:57:50,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:50,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:57:50,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:50,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1258905936, now seen corresponding path program 1 times [2023-11-06 21:57:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688502254] [2023-11-06 21:57:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:51,146 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 21:57:51,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:51,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688502254] [2023-11-06 21:57:51,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688502254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:57:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130036233] [2023-11-06 21:57:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:57:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:57:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:57:51,151 INFO L87 Difference]: Start difference. First operand 344 states and 496 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:51,441 INFO L93 Difference]: Finished difference Result 439 states and 592 transitions. [2023-11-06 21:57:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:57:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:57:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:51,448 INFO L225 Difference]: With dead ends: 439 [2023-11-06 21:57:51,448 INFO L226 Difference]: Without dead ends: 439 [2023-11-06 21:57:51,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:51,449 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 125 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:51,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 774 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-06 21:57:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 343. [2023-11-06 21:57:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 261 states have (on average 1.8199233716475096) internal successors, (475), 330 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2023-11-06 21:57:51,470 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 10 [2023-11-06 21:57:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2023-11-06 21:57:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2023-11-06 21:57:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:57:51,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:51,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:57:51,475 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:51,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash 314118792, now seen corresponding path program 1 times [2023-11-06 21:57:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555899895] [2023-11-06 21:57:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:51,501 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 21:57:51,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555899895] [2023-11-06 21:57:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555899895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:51,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984964005] [2023-11-06 21:57:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:51,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:51,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:51,504 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 21:57:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:51,662 INFO L93 Difference]: Finished difference Result 394 states and 542 transitions. [2023-11-06 21:57:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) Word has length 11 [2023-11-06 21:57:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:51,666 INFO L225 Difference]: With dead ends: 394 [2023-11-06 21:57:51,666 INFO L226 Difference]: Without dead ends: 387 [2023-11-06 21:57:51,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:51,667 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 64 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:51,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 273 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:57:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-06 21:57:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 340. [2023-11-06 21:57:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 258 states have (on average 1.821705426356589) internal successors, (470), 327 states have internal predecessors, (470), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 490 transitions. [2023-11-06 21:57:51,683 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 490 transitions. Word has length 11 [2023-11-06 21:57:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:51,683 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 490 transitions. [2023-11-06 21:57:51,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 21:57:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 490 transitions. [2023-11-06 21:57:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 21:57:51,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:51,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:51,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:57:51,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:51,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash -584855357, now seen corresponding path program 1 times [2023-11-06 21:57:51,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:51,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294901024] [2023-11-06 21:57:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:51,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:57:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:51,759 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 21:57:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294901024] [2023-11-06 21:57:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294901024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:51,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959381468] [2023-11-06 21:57:51,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:51,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:51,763 INFO L87 Difference]: Start difference. First operand 340 states and 490 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:52,096 INFO L93 Difference]: Finished difference Result 448 states and 585 transitions. [2023-11-06 21:57:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-06 21:57:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:52,101 INFO L225 Difference]: With dead ends: 448 [2023-11-06 21:57:52,101 INFO L226 Difference]: Without dead ends: 448 [2023-11-06 21:57:52,101 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 21:57:52,102 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 172 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:52,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 340 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-06 21:57:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 346. [2023-11-06 21:57:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.803030303030303) internal successors, (476), 333 states have internal predecessors, (476), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 496 transitions. [2023-11-06 21:57:52,118 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 496 transitions. Word has length 15 [2023-11-06 21:57:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:52,119 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 496 transitions. [2023-11-06 21:57:52,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 496 transitions. [2023-11-06 21:57:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 21:57:52,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:52,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:52,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:57:52,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:52,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -584855356, now seen corresponding path program 1 times [2023-11-06 21:57:52,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:52,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166311909] [2023-11-06 21:57:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:52,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:57:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:52,293 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 21:57:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166311909] [2023-11-06 21:57:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166311909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:52,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446064918] [2023-11-06 21:57:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:52,297 INFO L87 Difference]: Start difference. First operand 346 states and 496 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:52,534 INFO L93 Difference]: Finished difference Result 390 states and 504 transitions. [2023-11-06 21:57:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:52,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-06 21:57:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:52,538 INFO L225 Difference]: With dead ends: 390 [2023-11-06 21:57:52,538 INFO L226 Difference]: Without dead ends: 390 [2023-11-06 21:57:52,539 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 21:57:52,539 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 107 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:52,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 428 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-06 21:57:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 346. [2023-11-06 21:57:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 264 states have (on average 1.768939393939394) internal successors, (467), 333 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 487 transitions. [2023-11-06 21:57:52,555 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 487 transitions. Word has length 15 [2023-11-06 21:57:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:52,556 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 487 transitions. [2023-11-06 21:57:52,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 487 transitions. [2023-11-06 21:57:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:57:52,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:52,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:52,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:57:52,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:52,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash 590215118, now seen corresponding path program 1 times [2023-11-06 21:57:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:52,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760028383] [2023-11-06 21:57:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:52,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:52,707 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 21:57:52,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:52,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760028383] [2023-11-06 21:57:52,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760028383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:52,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:52,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776461228] [2023-11-06 21:57:52,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:52,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:57:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:57:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:52,711 INFO L87 Difference]: Start difference. First operand 346 states and 487 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:53,101 INFO L93 Difference]: Finished difference Result 480 states and 616 transitions. [2023-11-06 21:57:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:57:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-06 21:57:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:53,105 INFO L225 Difference]: With dead ends: 480 [2023-11-06 21:57:53,106 INFO L226 Difference]: Without dead ends: 480 [2023-11-06 21:57:53,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:53,107 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 395 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:53,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 324 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-11-06 21:57:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 343. [2023-11-06 21:57:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 265 states have (on average 1.739622641509434) internal successors, (461), 330 states have internal predecessors, (461), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-06 21:57:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 481 transitions. [2023-11-06 21:57:53,123 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 481 transitions. Word has length 17 [2023-11-06 21:57:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:53,123 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 481 transitions. [2023-11-06 21:57:53,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 481 transitions. [2023-11-06 21:57:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:57:53,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:53,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:53,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:57:53,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:53,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 590215119, now seen corresponding path program 1 times [2023-11-06 21:57:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373585651] [2023-11-06 21:57:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:53,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:53,420 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 21:57:53,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:53,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373585651] [2023-11-06 21:57:53,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373585651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:53,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:53,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:57:53,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215251418] [2023-11-06 21:57:53,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:53,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:57:53,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:53,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:57:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:53,423 INFO L87 Difference]: Start difference. First operand 343 states and 481 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:54,133 INFO L93 Difference]: Finished difference Result 554 states and 702 transitions. [2023-11-06 21:57:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-06 21:57:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:54,138 INFO L225 Difference]: With dead ends: 554 [2023-11-06 21:57:54,138 INFO L226 Difference]: Without dead ends: 554 [2023-11-06 21:57:54,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:54,139 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 367 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:54,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 470 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:57:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-11-06 21:57:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 376. [2023-11-06 21:57:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 296 states have (on average 1.7263513513513513) internal successors, (511), 362 states have internal predecessors, (511), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2023-11-06 21:57:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 535 transitions. [2023-11-06 21:57:54,158 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 535 transitions. Word has length 17 [2023-11-06 21:57:54,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:54,159 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 535 transitions. [2023-11-06 21:57:54,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 535 transitions. [2023-11-06 21:57:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 21:57:54,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:54,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:54,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:57:54,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:54,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1217239344, now seen corresponding path program 1 times [2023-11-06 21:57:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726000639] [2023-11-06 21:57:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,255 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 21:57:54,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:54,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726000639] [2023-11-06 21:57:54,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726000639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:57:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069869569] [2023-11-06 21:57:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:57:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:57:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:57:54,258 INFO L87 Difference]: Start difference. First operand 376 states and 535 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:54,316 INFO L93 Difference]: Finished difference Result 484 states and 686 transitions. [2023-11-06 21:57:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-06 21:57:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:54,320 INFO L225 Difference]: With dead ends: 484 [2023-11-06 21:57:54,321 INFO L226 Difference]: Without dead ends: 484 [2023-11-06 21:57:54,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:54,322 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 125 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:54,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1110 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-11-06 21:57:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 386. [2023-11-06 21:57:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 303 states have (on average 1.7062706270627064) internal successors, (517), 371 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 547 transitions. [2023-11-06 21:57:54,339 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 547 transitions. Word has length 17 [2023-11-06 21:57:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:54,339 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 547 transitions. [2023-11-06 21:57:54,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 547 transitions. [2023-11-06 21:57:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 21:57:54,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:54,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:57:54,342 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:54,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 920341577, now seen corresponding path program 1 times [2023-11-06 21:57:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:54,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675112854] [2023-11-06 21:57:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:54,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,729 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 21:57:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675112854] [2023-11-06 21:57:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675112854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:54,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:54,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:57:54,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317513160] [2023-11-06 21:57:54,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:54,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:57:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:57:54,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:54,733 INFO L87 Difference]: Start difference. First operand 386 states and 547 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:55,707 INFO L93 Difference]: Finished difference Result 580 states and 743 transitions. [2023-11-06 21:57:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-06 21:57:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:55,713 INFO L225 Difference]: With dead ends: 580 [2023-11-06 21:57:55,714 INFO L226 Difference]: Without dead ends: 580 [2023-11-06 21:57:55,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:57:55,715 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 403 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:55,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 766 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:57:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-11-06 21:57:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 383. [2023-11-06 21:57:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 300 states have (on average 1.7066666666666668) internal successors, (512), 368 states have internal predecessors, (512), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 542 transitions. [2023-11-06 21:57:55,731 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 542 transitions. Word has length 18 [2023-11-06 21:57:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:55,731 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 542 transitions. [2023-11-06 21:57:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 542 transitions. [2023-11-06 21:57:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:57:55,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:55,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:57:55,733 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:55,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1931813849, now seen corresponding path program 1 times [2023-11-06 21:57:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:55,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387900610] [2023-11-06 21:57:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:57:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,058 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 21:57:56,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387900610] [2023-11-06 21:57:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387900610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:56,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:56,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:57:56,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341382330] [2023-11-06 21:57:56,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:56,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:56,061 INFO L87 Difference]: Start difference. First operand 383 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:56,606 INFO L93 Difference]: Finished difference Result 482 states and 647 transitions. [2023-11-06 21:57:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:57:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-06 21:57:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:56,610 INFO L225 Difference]: With dead ends: 482 [2023-11-06 21:57:56,610 INFO L226 Difference]: Without dead ends: 482 [2023-11-06 21:57:56,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:57:56,611 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 116 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:56,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1048 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-06 21:57:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 377. [2023-11-06 21:57:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 294 states have (on average 1.7040816326530612) internal successors, (501), 362 states have internal predecessors, (501), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 531 transitions. [2023-11-06 21:57:56,627 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 531 transitions. Word has length 21 [2023-11-06 21:57:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:56,628 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 531 transitions. [2023-11-06 21:57:56,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 531 transitions. [2023-11-06 21:57:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:57:56,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:56,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:57:56,633 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:56,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1757289300, now seen corresponding path program 1 times [2023-11-06 21:57:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:56,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005852077] [2023-11-06 21:57:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,959 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 21:57:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005852077] [2023-11-06 21:57:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005852077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:56,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:57:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722275321] [2023-11-06 21:57:56,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:56,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:56,962 INFO L87 Difference]: Start difference. First operand 377 states and 531 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:57,415 INFO L93 Difference]: Finished difference Result 571 states and 775 transitions. [2023-11-06 21:57:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:57:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-06 21:57:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:57,420 INFO L225 Difference]: With dead ends: 571 [2023-11-06 21:57:57,420 INFO L226 Difference]: Without dead ends: 571 [2023-11-06 21:57:57,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:57:57,421 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 195 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:57,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1126 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-06 21:57:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 395. [2023-11-06 21:57:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 312 states have (on average 1.6826923076923077) internal successors, (525), 378 states have internal predecessors, (525), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2023-11-06 21:57:57,438 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 21 [2023-11-06 21:57:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:57,438 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2023-11-06 21:57:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2023-11-06 21:57:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:57:57,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:57,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:57,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 21:57:57,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:57,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2074565938, now seen corresponding path program 1 times [2023-11-06 21:57:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:57,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863829250] [2023-11-06 21:57:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,733 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 21:57:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863829250] [2023-11-06 21:57:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863829250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:57,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:57,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:57:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294972479] [2023-11-06 21:57:57,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:57,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:57,739 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:58,240 INFO L93 Difference]: Finished difference Result 568 states and 769 transitions. [2023-11-06 21:57:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:57:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-06 21:57:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:58,245 INFO L225 Difference]: With dead ends: 568 [2023-11-06 21:57:58,245 INFO L226 Difference]: Without dead ends: 568 [2023-11-06 21:57:58,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:57:58,246 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 188 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:58,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1214 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-11-06 21:57:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 403. [2023-11-06 21:57:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.665625) internal successors, (533), 384 states have internal predecessors, (533), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 563 transitions. [2023-11-06 21:57:58,264 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 563 transitions. Word has length 22 [2023-11-06 21:57:58,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:58,265 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 563 transitions. [2023-11-06 21:57:58,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 563 transitions. [2023-11-06 21:57:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 21:57:58,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:58,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 21:57:58,267 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:58,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595598, now seen corresponding path program 1 times [2023-11-06 21:57:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922257902] [2023-11-06 21:57:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:57:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,361 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 21:57:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:58,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922257902] [2023-11-06 21:57:58,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922257902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:58,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:58,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594839949] [2023-11-06 21:57:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:58,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:58,364 INFO L87 Difference]: Start difference. First operand 403 states and 563 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:58,633 INFO L93 Difference]: Finished difference Result 496 states and 642 transitions. [2023-11-06 21:57:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-06 21:57:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:58,638 INFO L225 Difference]: With dead ends: 496 [2023-11-06 21:57:58,638 INFO L226 Difference]: Without dead ends: 496 [2023-11-06 21:57:58,639 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 21:57:58,639 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 188 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:58,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 348 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-06 21:57:58,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 423. [2023-11-06 21:57:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 340 states have (on average 1.6852941176470588) internal successors, (573), 404 states have internal predecessors, (573), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:57:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 603 transitions. [2023-11-06 21:57:58,662 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 603 transitions. Word has length 23 [2023-11-06 21:57:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:58,662 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 603 transitions. [2023-11-06 21:57:58,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 603 transitions. [2023-11-06 21:57:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 21:57:58,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:58,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 21:57:58,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:58,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:58,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1039595597, now seen corresponding path program 1 times [2023-11-06 21:57:58,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:58,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750134282] [2023-11-06 21:57:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-06 21:57:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,912 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 21:57:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750134282] [2023-11-06 21:57:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750134282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:58,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:58,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:57:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021110543] [2023-11-06 21:57:58,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:58,917 INFO L87 Difference]: Start difference. First operand 423 states and 603 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:59,336 INFO L93 Difference]: Finished difference Result 512 states and 671 transitions. [2023-11-06 21:57:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:57:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-06 21:57:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:59,340 INFO L225 Difference]: With dead ends: 512 [2023-11-06 21:57:59,340 INFO L226 Difference]: Without dead ends: 512 [2023-11-06 21:57:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:57:59,341 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 207 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:59,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1672 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-06 21:57:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 310. [2023-11-06 21:57:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.6808510638297873) internal successors, (395), 297 states have internal predecessors, (395), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:57:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 413 transitions. [2023-11-06 21:57:59,359 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 413 transitions. Word has length 23 [2023-11-06 21:57:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:59,360 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 413 transitions. [2023-11-06 21:57:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 413 transitions. [2023-11-06 21:57:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:57:59,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:59,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 21:57:59,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:59,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1218800521, now seen corresponding path program 1 times [2023-11-06 21:57:59,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:59,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94225774] [2023-11-06 21:57:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,434 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 21:57:59,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94225774] [2023-11-06 21:57:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94225774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:59,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:59,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:57:59,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705069099] [2023-11-06 21:57:59,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:59,439 INFO L87 Difference]: Start difference. First operand 310 states and 413 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:59,480 INFO L93 Difference]: Finished difference Result 322 states and 425 transitions. [2023-11-06 21:57:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:57:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-06 21:57:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:59,483 INFO L225 Difference]: With dead ends: 322 [2023-11-06 21:57:59,484 INFO L226 Difference]: Without dead ends: 322 [2023-11-06 21:57:59,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:59,485 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 521 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:57:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-06 21:57:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-11-06 21:57:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 244 states have (on average 1.6557377049180328) internal successors, (404), 306 states have internal predecessors, (404), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:57:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 422 transitions. [2023-11-06 21:57:59,500 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 422 transitions. Word has length 25 [2023-11-06 21:57:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:59,500 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 422 transitions. [2023-11-06 21:57:59,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 422 transitions. [2023-11-06 21:57:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:57:59,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:59,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 21:57:59,502 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:59,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647563, now seen corresponding path program 1 times [2023-11-06 21:57:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271282674] [2023-11-06 21:57:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:59,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,620 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 21:57:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:59,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271282674] [2023-11-06 21:57:59,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271282674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:59,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:59,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:57:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706480022] [2023-11-06 21:57:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:59,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:57:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:57:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:59,624 INFO L87 Difference]: Start difference. First operand 319 states and 422 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:59,814 INFO L93 Difference]: Finished difference Result 424 states and 566 transitions. [2023-11-06 21:57:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:57:59,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-06 21:57:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:59,819 INFO L225 Difference]: With dead ends: 424 [2023-11-06 21:57:59,819 INFO L226 Difference]: Without dead ends: 424 [2023-11-06 21:57:59,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:57:59,821 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 89 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:59,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 356 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-06 21:57:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 374. [2023-11-06 21:57:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 300 states have (on average 1.6166666666666667) internal successors, (485), 361 states have internal predecessors, (485), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:57:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 503 transitions. [2023-11-06 21:57:59,852 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 503 transitions. Word has length 25 [2023-11-06 21:57:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:59,854 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 503 transitions. [2023-11-06 21:57:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:57:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 503 transitions. [2023-11-06 21:57:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:57:59,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:59,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:59,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 21:57:59,858 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:57:59,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1220647562, now seen corresponding path program 1 times [2023-11-06 21:57:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133156888] [2023-11-06 21:57:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:59,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:57:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:59,918 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 21:57:59,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133156888] [2023-11-06 21:57:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133156888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:59,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395467322] [2023-11-06 21:57:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:59,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:59,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:59,922 INFO L87 Difference]: Start difference. First operand 374 states and 503 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:00,026 INFO L93 Difference]: Finished difference Result 371 states and 491 transitions. [2023-11-06 21:58:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-06 21:58:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:00,030 INFO L225 Difference]: With dead ends: 371 [2023-11-06 21:58:00,030 INFO L226 Difference]: Without dead ends: 371 [2023-11-06 21:58:00,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:00,031 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:00,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 236 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-06 21:58:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-06 21:58:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 300 states have (on average 1.5766666666666667) internal successors, (473), 358 states have internal predecessors, (473), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 491 transitions. [2023-11-06 21:58:00,047 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 491 transitions. Word has length 25 [2023-11-06 21:58:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:00,048 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 491 transitions. [2023-11-06 21:58:00,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 491 transitions. [2023-11-06 21:58:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:58:00,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:00,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 21:58:00,049 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:00,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1209666842, now seen corresponding path program 1 times [2023-11-06 21:58:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510506283] [2023-11-06 21:58:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,156 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 21:58:00,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510506283] [2023-11-06 21:58:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510506283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:00,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:00,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195349079] [2023-11-06 21:58:00,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:00,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:00,160 INFO L87 Difference]: Start difference. First operand 371 states and 491 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:00,212 INFO L93 Difference]: Finished difference Result 443 states and 582 transitions. [2023-11-06 21:58:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-06 21:58:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:00,217 INFO L225 Difference]: With dead ends: 443 [2023-11-06 21:58:00,217 INFO L226 Difference]: Without dead ends: 443 [2023-11-06 21:58:00,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:00,219 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 112 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:00,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 855 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-06 21:58:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 371. [2023-11-06 21:58:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 300 states have (on average 1.5666666666666667) internal successors, (470), 358 states have internal predecessors, (470), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 488 transitions. [2023-11-06 21:58:00,234 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 488 transitions. Word has length 26 [2023-11-06 21:58:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:00,234 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 488 transitions. [2023-11-06 21:58:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 488 transitions. [2023-11-06 21:58:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:58:00,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:00,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 21:58:00,236 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:00,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2088228101, now seen corresponding path program 1 times [2023-11-06 21:58:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937716206] [2023-11-06 21:58:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,346 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 21:58:00,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:00,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937716206] [2023-11-06 21:58:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937716206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:00,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:00,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520625862] [2023-11-06 21:58:00,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:00,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:00,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:00,351 INFO L87 Difference]: Start difference. First operand 371 states and 488 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:00,527 INFO L93 Difference]: Finished difference Result 474 states and 626 transitions. [2023-11-06 21:58:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-06 21:58:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:00,531 INFO L225 Difference]: With dead ends: 474 [2023-11-06 21:58:00,531 INFO L226 Difference]: Without dead ends: 474 [2023-11-06 21:58:00,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:00,532 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 82 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:00,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 380 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-06 21:58:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 371. [2023-11-06 21:58:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 300 states have (on average 1.5666666666666667) internal successors, (470), 358 states have internal predecessors, (470), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 488 transitions. [2023-11-06 21:58:00,547 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 488 transitions. Word has length 26 [2023-11-06 21:58:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:00,548 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 488 transitions. [2023-11-06 21:58:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 488 transitions. [2023-11-06 21:58:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:58:00,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:00,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 21:58:00,557 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:00,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1505674617, now seen corresponding path program 1 times [2023-11-06 21:58:00,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174630792] [2023-11-06 21:58:00,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,644 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 21:58:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:00,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174630792] [2023-11-06 21:58:00,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174630792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:00,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:00,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:00,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819230806] [2023-11-06 21:58:00,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:00,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:00,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:00,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:00,648 INFO L87 Difference]: Start difference. First operand 371 states and 488 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:00,697 INFO L93 Difference]: Finished difference Result 439 states and 573 transitions. [2023-11-06 21:58:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-06 21:58:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:00,701 INFO L225 Difference]: With dead ends: 439 [2023-11-06 21:58:00,701 INFO L226 Difference]: Without dead ends: 439 [2023-11-06 21:58:00,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:00,702 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 113 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:00,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1064 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-06 21:58:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 314. [2023-11-06 21:58:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 244 states have (on average 1.569672131147541) internal successors, (383), 301 states have internal predecessors, (383), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 401 transitions. [2023-11-06 21:58:00,714 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 401 transitions. Word has length 26 [2023-11-06 21:58:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:00,715 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 401 transitions. [2023-11-06 21:58:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 401 transitions. [2023-11-06 21:58:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:58:00,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:00,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 21:58:00,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:00,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 516237483, now seen corresponding path program 1 times [2023-11-06 21:58:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646592617] [2023-11-06 21:58:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:00,896 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 21:58:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646592617] [2023-11-06 21:58:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646592617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:00,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:58:00,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139497131] [2023-11-06 21:58:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:00,900 INFO L87 Difference]: Start difference. First operand 314 states and 401 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:01,134 INFO L93 Difference]: Finished difference Result 358 states and 451 transitions. [2023-11-06 21:58:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:58:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-06 21:58:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:01,137 INFO L225 Difference]: With dead ends: 358 [2023-11-06 21:58:01,137 INFO L226 Difference]: Without dead ends: 358 [2023-11-06 21:58:01,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:58:01,138 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 42 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:01,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 724 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-06 21:58:01,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 344. [2023-11-06 21:58:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 274 states have (on average 1.5255474452554745) internal successors, (418), 331 states have internal predecessors, (418), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 436 transitions. [2023-11-06 21:58:01,153 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 436 transitions. Word has length 27 [2023-11-06 21:58:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:01,153 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 436 transitions. [2023-11-06 21:58:01,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 436 transitions. [2023-11-06 21:58:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:58:01,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:01,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:01,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-06 21:58:01,155 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:01,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:01,156 INFO L85 PathProgramCache]: Analyzing trace with hash 516237677, now seen corresponding path program 1 times [2023-11-06 21:58:01,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:01,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838712184] [2023-11-06 21:58:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,258 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 21:58:01,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:01,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838712184] [2023-11-06 21:58:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838712184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759255365] [2023-11-06 21:58:01,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:01,262 INFO L87 Difference]: Start difference. First operand 344 states and 436 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:01,371 INFO L93 Difference]: Finished difference Result 476 states and 603 transitions. [2023-11-06 21:58:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-11-06 21:58:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:01,376 INFO L225 Difference]: With dead ends: 476 [2023-11-06 21:58:01,376 INFO L226 Difference]: Without dead ends: 476 [2023-11-06 21:58:01,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:01,377 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 129 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:01,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 338 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-06 21:58:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 430. [2023-11-06 21:58:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 360 states have (on average 1.5) internal successors, (540), 417 states have internal predecessors, (540), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 558 transitions. [2023-11-06 21:58:01,394 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 558 transitions. Word has length 27 [2023-11-06 21:58:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:01,394 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 558 transitions. [2023-11-06 21:58:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 558 transitions. [2023-11-06 21:58:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 21:58:01,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:01,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-06 21:58:01,396 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:01,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1037479271, now seen corresponding path program 1 times [2023-11-06 21:58:01,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:01,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765960792] [2023-11-06 21:58:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,509 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 21:58:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765960792] [2023-11-06 21:58:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765960792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:01,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:01,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621377355] [2023-11-06 21:58:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:01,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:01,513 INFO L87 Difference]: Start difference. First operand 430 states and 558 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:01,708 INFO L93 Difference]: Finished difference Result 475 states and 597 transitions. [2023-11-06 21:58:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-06 21:58:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:01,712 INFO L225 Difference]: With dead ends: 475 [2023-11-06 21:58:01,712 INFO L226 Difference]: Without dead ends: 475 [2023-11-06 21:58:01,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:01,713 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 76 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:01,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 380 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-06 21:58:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 343. [2023-11-06 21:58:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 274 states have (on average 1.5036496350364963) internal successors, (412), 330 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 430 transitions. [2023-11-06 21:58:01,727 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 430 transitions. Word has length 28 [2023-11-06 21:58:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:01,728 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 430 transitions. [2023-11-06 21:58:01,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 430 transitions. [2023-11-06 21:58:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 21:58:01,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:01,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-06 21:58:01,730 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:01,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -734692199, now seen corresponding path program 1 times [2023-11-06 21:58:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:01,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57414513] [2023-11-06 21:58:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,841 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 21:58:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57414513] [2023-11-06 21:58:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57414513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:01,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:01,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116935239] [2023-11-06 21:58:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:01,844 INFO L87 Difference]: Start difference. First operand 343 states and 430 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:02,177 INFO L93 Difference]: Finished difference Result 428 states and 525 transitions. [2023-11-06 21:58:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-11-06 21:58:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:02,181 INFO L225 Difference]: With dead ends: 428 [2023-11-06 21:58:02,181 INFO L226 Difference]: Without dead ends: 428 [2023-11-06 21:58:02,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:02,182 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 166 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:02,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 575 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-11-06 21:58:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 342. [2023-11-06 21:58:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 274 states have (on average 1.4963503649635037) internal successors, (410), 329 states have internal predecessors, (410), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 428 transitions. [2023-11-06 21:58:02,196 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 428 transitions. Word has length 35 [2023-11-06 21:58:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:02,196 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 428 transitions. [2023-11-06 21:58:02,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 428 transitions. [2023-11-06 21:58:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 21:58:02,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:02,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:02,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-06 21:58:02,198 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:02,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:02,199 INFO L85 PathProgramCache]: Analyzing trace with hash -734692198, now seen corresponding path program 1 times [2023-11-06 21:58:02,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:02,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720734164] [2023-11-06 21:58:02,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:02,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,443 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 21:58:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:02,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720734164] [2023-11-06 21:58:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720734164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:02,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054090857] [2023-11-06 21:58:02,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:02,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:02,447 INFO L87 Difference]: Start difference. First operand 342 states and 428 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:02,737 INFO L93 Difference]: Finished difference Result 341 states and 426 transitions. [2023-11-06 21:58:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:02,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-11-06 21:58:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:02,740 INFO L225 Difference]: With dead ends: 341 [2023-11-06 21:58:02,740 INFO L226 Difference]: Without dead ends: 341 [2023-11-06 21:58:02,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:02,741 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 163 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:02,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 546 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-06 21:58:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2023-11-06 21:58:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 274 states have (on average 1.489051094890511) internal successors, (408), 328 states have internal predecessors, (408), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 426 transitions. [2023-11-06 21:58:02,755 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 426 transitions. Word has length 35 [2023-11-06 21:58:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:02,755 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 426 transitions. [2023-11-06 21:58:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 426 transitions. [2023-11-06 21:58:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:58:02,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:02,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:02,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-06 21:58:02,759 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:02,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563334, now seen corresponding path program 1 times [2023-11-06 21:58:02,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:02,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248508267] [2023-11-06 21:58:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:02,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,886 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 21:58:02,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:02,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248508267] [2023-11-06 21:58:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248508267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961358398] [2023-11-06 21:58:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:02,889 INFO L87 Difference]: Start difference. First operand 341 states and 426 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:03,100 INFO L93 Difference]: Finished difference Result 392 states and 480 transitions. [2023-11-06 21:58:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-06 21:58:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:03,104 INFO L225 Difference]: With dead ends: 392 [2023-11-06 21:58:03,104 INFO L226 Difference]: Without dead ends: 392 [2023-11-06 21:58:03,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:03,105 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 79 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:03,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 454 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-06 21:58:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 338. [2023-11-06 21:58:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 274 states have (on average 1.467153284671533) internal successors, (402), 325 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 420 transitions. [2023-11-06 21:58:03,121 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 420 transitions. Word has length 37 [2023-11-06 21:58:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:03,122 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 420 transitions. [2023-11-06 21:58:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 420 transitions. [2023-11-06 21:58:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:58:03,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:03,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-06 21:58:03,125 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:03,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563333, now seen corresponding path program 1 times [2023-11-06 21:58:03,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:03,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752608229] [2023-11-06 21:58:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:03,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,396 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 21:58:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:03,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752608229] [2023-11-06 21:58:03,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752608229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:03,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:03,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24883037] [2023-11-06 21:58:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:03,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:03,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:03,399 INFO L87 Difference]: Start difference. First operand 338 states and 420 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:03,629 INFO L93 Difference]: Finished difference Result 391 states and 478 transitions. [2023-11-06 21:58:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:03,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-06 21:58:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:03,633 INFO L225 Difference]: With dead ends: 391 [2023-11-06 21:58:03,633 INFO L226 Difference]: Without dead ends: 391 [2023-11-06 21:58:03,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:03,634 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 334 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:03,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 354 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-06 21:58:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2023-11-06 21:58:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 274 states have (on average 1.4598540145985401) internal successors, (400), 324 states have internal predecessors, (400), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 418 transitions. [2023-11-06 21:58:03,647 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 418 transitions. Word has length 37 [2023-11-06 21:58:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:03,648 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 418 transitions. [2023-11-06 21:58:03,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 418 transitions. [2023-11-06 21:58:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:58:03,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:03,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:03,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-06 21:58:03,650 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:03,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1664563172, now seen corresponding path program 1 times [2023-11-06 21:58:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:03,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82873967] [2023-11-06 21:58:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:03,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,987 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 21:58:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82873967] [2023-11-06 21:58:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82873967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:03,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096274488] [2023-11-06 21:58:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:03,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:03,990 INFO L87 Difference]: Start difference. First operand 337 states and 418 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:04,382 INFO L93 Difference]: Finished difference Result 390 states and 443 transitions. [2023-11-06 21:58:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-11-06 21:58:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:04,385 INFO L225 Difference]: With dead ends: 390 [2023-11-06 21:58:04,385 INFO L226 Difference]: Without dead ends: 390 [2023-11-06 21:58:04,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:04,386 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:04,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 383 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-06 21:58:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 337. [2023-11-06 21:58:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 274 states have (on average 1.4525547445255473) internal successors, (398), 324 states have internal predecessors, (398), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 416 transitions. [2023-11-06 21:58:04,399 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 416 transitions. Word has length 37 [2023-11-06 21:58:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:04,399 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 416 transitions. [2023-11-06 21:58:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 416 transitions. [2023-11-06 21:58:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 21:58:04,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:04,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:04,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-06 21:58:04,401 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:04,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1071259938, now seen corresponding path program 1 times [2023-11-06 21:58:04,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:04,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115985577] [2023-11-06 21:58:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115985577] [2023-11-06 21:58:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115985577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:04,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:04,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469120062] [2023-11-06 21:58:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:04,616 INFO L87 Difference]: Start difference. First operand 337 states and 416 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:04,819 INFO L93 Difference]: Finished difference Result 354 states and 433 transitions. [2023-11-06 21:58:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:04,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-11-06 21:58:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:04,822 INFO L225 Difference]: With dead ends: 354 [2023-11-06 21:58:04,822 INFO L226 Difference]: Without dead ends: 354 [2023-11-06 21:58:04,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:04,823 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 289 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:04,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 328 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-11-06 21:58:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 338. [2023-11-06 21:58:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 276 states have (on average 1.4492753623188406) internal successors, (400), 325 states have internal predecessors, (400), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 418 transitions. [2023-11-06 21:58:04,832 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 418 transitions. Word has length 48 [2023-11-06 21:58:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:04,833 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 418 transitions. [2023-11-06 21:58:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 418 transitions. [2023-11-06 21:58:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 21:58:04,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:04,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-06 21:58:04,835 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:04,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1071260000, now seen corresponding path program 1 times [2023-11-06 21:58:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012420588] [2023-11-06 21:58:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012420588] [2023-11-06 21:58:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012420588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:05,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658478061] [2023-11-06 21:58:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:05,092 INFO L87 Difference]: Start difference. First operand 338 states and 418 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:05,273 INFO L93 Difference]: Finished difference Result 353 states and 431 transitions. [2023-11-06 21:58:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:05,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-11-06 21:58:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:05,276 INFO L225 Difference]: With dead ends: 353 [2023-11-06 21:58:05,276 INFO L226 Difference]: Without dead ends: 353 [2023-11-06 21:58:05,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:05,277 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 270 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:05,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 322 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-06 21:58:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 335. [2023-11-06 21:58:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 274 states have (on average 1.4416058394160585) internal successors, (395), 322 states have internal predecessors, (395), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 413 transitions. [2023-11-06 21:58:05,287 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 413 transitions. Word has length 48 [2023-11-06 21:58:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:05,288 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 413 transitions. [2023-11-06 21:58:05,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 413 transitions. [2023-11-06 21:58:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 21:58:05,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:05,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-06 21:58:05,290 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:05,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 122043664, now seen corresponding path program 1 times [2023-11-06 21:58:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192056339] [2023-11-06 21:58:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:58:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:58:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192056339] [2023-11-06 21:58:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192056339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:05,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155871881] [2023-11-06 21:58:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:05,586 INFO L87 Difference]: Start difference. First operand 335 states and 413 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:58:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:05,794 INFO L93 Difference]: Finished difference Result 333 states and 409 transitions. [2023-11-06 21:58:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-11-06 21:58:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:05,797 INFO L225 Difference]: With dead ends: 333 [2023-11-06 21:58:05,798 INFO L226 Difference]: Without dead ends: 333 [2023-11-06 21:58:05,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:05,800 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 270 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:05,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 322 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-06 21:58:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-11-06 21:58:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 274 states have (on average 1.427007299270073) internal successors, (391), 320 states have internal predecessors, (391), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 409 transitions. [2023-11-06 21:58:05,819 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 409 transitions. Word has length 50 [2023-11-06 21:58:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:05,819 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 409 transitions. [2023-11-06 21:58:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:58:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 409 transitions. [2023-11-06 21:58:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 21:58:05,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:05,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:05,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-06 21:58:05,821 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:05,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1996957779, now seen corresponding path program 1 times [2023-11-06 21:58:05,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:05,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534713401] [2023-11-06 21:58:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:07,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:07,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:07,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534713401] [2023-11-06 21:58:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534713401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 21:58:07,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683164089] [2023-11-06 21:58:07,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:07,205 INFO L87 Difference]: Start difference. First operand 333 states and 409 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:08,340 INFO L93 Difference]: Finished difference Result 364 states and 441 transitions. [2023-11-06 21:58:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:08,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-11-06 21:58:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:08,343 INFO L225 Difference]: With dead ends: 364 [2023-11-06 21:58:08,343 INFO L226 Difference]: Without dead ends: 364 [2023-11-06 21:58:08,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:58:08,344 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 84 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:08,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1203 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-06 21:58:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 357. [2023-11-06 21:58:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 298 states have (on average 1.395973154362416) internal successors, (416), 344 states have internal predecessors, (416), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-06 21:58:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 434 transitions. [2023-11-06 21:58:08,357 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 434 transitions. Word has length 51 [2023-11-06 21:58:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:08,358 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 434 transitions. [2023-11-06 21:58:08,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 434 transitions. [2023-11-06 21:58:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:08,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:08,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:08,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-06 21:58:08,360 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:08,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1999969648, now seen corresponding path program 1 times [2023-11-06 21:58:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056739485] [2023-11-06 21:58:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:09,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056739485] [2023-11-06 21:58:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056739485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:09,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:09,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 21:58:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622017455] [2023-11-06 21:58:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:58:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:58:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:09,342 INFO L87 Difference]: Start difference. First operand 357 states and 434 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:10,427 INFO L93 Difference]: Finished difference Result 891 states and 1091 transitions. [2023-11-06 21:58:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-06 21:58:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:10,433 INFO L225 Difference]: With dead ends: 891 [2023-11-06 21:58:10,433 INFO L226 Difference]: Without dead ends: 891 [2023-11-06 21:58:10,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:58:10,434 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 601 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:10,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1415 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:58:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-11-06 21:58:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 503. [2023-11-06 21:58:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 437 states have (on average 1.3867276887871853) internal successors, (606), 486 states have internal predecessors, (606), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 21:58:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 636 transitions. [2023-11-06 21:58:10,470 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 636 transitions. Word has length 52 [2023-11-06 21:58:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:10,471 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 636 transitions. [2023-11-06 21:58:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 636 transitions. [2023-11-06 21:58:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:10,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:10,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:10,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-11-06 21:58:10,473 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:10,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:10,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1999969647, now seen corresponding path program 1 times [2023-11-06 21:58:10,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:10,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465649494] [2023-11-06 21:58:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:10,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465649494] [2023-11-06 21:58:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465649494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-06 21:58:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432392130] [2023-11-06 21:58:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:58:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:58:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:58:11,926 INFO L87 Difference]: Start difference. First operand 503 states and 636 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:13,537 INFO L93 Difference]: Finished difference Result 941 states and 1155 transitions. [2023-11-06 21:58:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-06 21:58:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:13,545 INFO L225 Difference]: With dead ends: 941 [2023-11-06 21:58:13,545 INFO L226 Difference]: Without dead ends: 941 [2023-11-06 21:58:13,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:58:13,547 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 644 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:13,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1589 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:58:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-11-06 21:58:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 556. [2023-11-06 21:58:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 486 states have (on average 1.4156378600823045) internal successors, (688), 537 states have internal predecessors, (688), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-06 21:58:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 724 transitions. [2023-11-06 21:58:13,574 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 724 transitions. Word has length 52 [2023-11-06 21:58:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:13,575 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 724 transitions. [2023-11-06 21:58:13,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 724 transitions. [2023-11-06 21:58:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:13,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:13,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:13,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-11-06 21:58:13,580 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:13,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122606, now seen corresponding path program 1 times [2023-11-06 21:58:13,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:13,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792050339] [2023-11-06 21:58:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792050339] [2023-11-06 21:58:14,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792050339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:14,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:58:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560873713] [2023-11-06 21:58:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:58:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:58:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:58:14,034 INFO L87 Difference]: Start difference. First operand 556 states and 724 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:14,797 INFO L93 Difference]: Finished difference Result 897 states and 1171 transitions. [2023-11-06 21:58:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:14,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-06 21:58:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:14,804 INFO L225 Difference]: With dead ends: 897 [2023-11-06 21:58:14,804 INFO L226 Difference]: Without dead ends: 897 [2023-11-06 21:58:14,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:58:14,805 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 208 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1206 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-11-06 21:58:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 669. [2023-11-06 21:58:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 583 states have (on average 1.4065180102915953) internal successors, (820), 642 states have internal predecessors, (820), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-06 21:58:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 880 transitions. [2023-11-06 21:58:14,865 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 880 transitions. Word has length 52 [2023-11-06 21:58:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:14,866 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 880 transitions. [2023-11-06 21:58:14,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 880 transitions. [2023-11-06 21:58:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:14,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:14,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:14,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-06 21:58:14,868 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:14,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1998122605, now seen corresponding path program 1 times [2023-11-06 21:58:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:14,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591949947] [2023-11-06 21:58:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:16,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:16,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591949947] [2023-11-06 21:58:16,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591949947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:16,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:16,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 21:58:16,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805290206] [2023-11-06 21:58:16,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:16,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:58:16,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:16,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:58:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:58:16,006 INFO L87 Difference]: Start difference. First operand 669 states and 880 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:17,155 INFO L93 Difference]: Finished difference Result 751 states and 932 transitions. [2023-11-06 21:58:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-06 21:58:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:17,161 INFO L225 Difference]: With dead ends: 751 [2023-11-06 21:58:17,161 INFO L226 Difference]: Without dead ends: 751 [2023-11-06 21:58:17,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:58:17,162 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 298 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:17,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 975 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-11-06 21:58:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 672. [2023-11-06 21:58:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 586 states have (on average 1.4027303754266212) internal successors, (822), 645 states have internal predecessors, (822), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-06 21:58:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 882 transitions. [2023-11-06 21:58:17,188 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 882 transitions. Word has length 52 [2023-11-06 21:58:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:17,188 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 882 transitions. [2023-11-06 21:58:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 882 transitions. [2023-11-06 21:58:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:17,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:17,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-06 21:58:17,191 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:17,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1818456665, now seen corresponding path program 1 times [2023-11-06 21:58:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245811598] [2023-11-06 21:58:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:17,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:18,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:18,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:18,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245811598] [2023-11-06 21:58:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245811598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:18,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:18,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-06 21:58:18,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491245158] [2023-11-06 21:58:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:18,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 21:58:18,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 21:58:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:58:18,629 INFO L87 Difference]: Start difference. First operand 672 states and 882 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:20,382 INFO L93 Difference]: Finished difference Result 815 states and 1004 transitions. [2023-11-06 21:58:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:58:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-11-06 21:58:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:20,389 INFO L225 Difference]: With dead ends: 815 [2023-11-06 21:58:20,389 INFO L226 Difference]: Without dead ends: 815 [2023-11-06 21:58:20,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:58:20,391 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 434 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:20,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1492 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:58:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-11-06 21:58:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 660. [2023-11-06 21:58:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 574 states have (on average 1.411149825783972) internal successors, (810), 633 states have internal predecessors, (810), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-06 21:58:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 870 transitions. [2023-11-06 21:58:20,421 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 870 transitions. Word has length 52 [2023-11-06 21:58:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:20,421 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 870 transitions. [2023-11-06 21:58:20,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 870 transitions. [2023-11-06 21:58:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:20,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:20,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-11-06 21:58:20,423 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:20,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -939923179, now seen corresponding path program 1 times [2023-11-06 21:58:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652606003] [2023-11-06 21:58:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:20,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:21,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652606003] [2023-11-06 21:58:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652606003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 21:58:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739821046] [2023-11-06 21:58:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:58:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:58:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:58:21,533 INFO L87 Difference]: Start difference. First operand 660 states and 870 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:22,889 INFO L93 Difference]: Finished difference Result 1203 states and 1542 transitions. [2023-11-06 21:58:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:58:22,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:22,897 INFO L225 Difference]: With dead ends: 1203 [2023-11-06 21:58:22,897 INFO L226 Difference]: Without dead ends: 1203 [2023-11-06 21:58:22,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:58:22,899 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 561 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:22,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1712 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:58:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-11-06 21:58:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 793. [2023-11-06 21:58:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 691 states have (on average 1.3921852387843705) internal successors, (962), 758 states have internal predecessors, (962), 28 states have call successors, (28), 14 states have call predecessors, (28), 28 states have return successors, (56), 20 states have call predecessors, (56), 28 states have call successors, (56) [2023-11-06 21:58:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1046 transitions. [2023-11-06 21:58:22,929 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1046 transitions. Word has length 53 [2023-11-06 21:58:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:22,930 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1046 transitions. [2023-11-06 21:58:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1046 transitions. [2023-11-06 21:58:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:22,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:22,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:22,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-11-06 21:58:22,933 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:22,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -939923178, now seen corresponding path program 1 times [2023-11-06 21:58:22,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:22,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030649859] [2023-11-06 21:58:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:22,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:24,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:24,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030649859] [2023-11-06 21:58:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030649859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-06 21:58:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519785487] [2023-11-06 21:58:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 21:58:24,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 21:58:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:58:24,580 INFO L87 Difference]: Start difference. First operand 793 states and 1046 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:26,190 INFO L93 Difference]: Finished difference Result 1239 states and 1579 transitions. [2023-11-06 21:58:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:26,199 INFO L225 Difference]: With dead ends: 1239 [2023-11-06 21:58:26,199 INFO L226 Difference]: Without dead ends: 1239 [2023-11-06 21:58:26,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:58:26,201 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 709 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:26,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1725 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:58:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-11-06 21:58:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 679. [2023-11-06 21:58:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 593 states have (on average 1.3979763912310286) internal successors, (829), 652 states have internal predecessors, (829), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 16 states have call predecessors, (40), 20 states have call successors, (40) [2023-11-06 21:58:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 889 transitions. [2023-11-06 21:58:26,230 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 889 transitions. Word has length 53 [2023-11-06 21:58:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:26,231 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 889 transitions. [2023-11-06 21:58:26,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 889 transitions. [2023-11-06 21:58:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:26,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:26,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-11-06 21:58:26,233 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:26,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash -938076136, now seen corresponding path program 1 times [2023-11-06 21:58:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120003209] [2023-11-06 21:58:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:28,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:28,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120003209] [2023-11-06 21:58:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120003209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932131196] [2023-11-06 21:58:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:28,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:28,832 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:28,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:29,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 21:58:29,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:29,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:30,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 21:58:30,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:58:30,618 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:58:30,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-11-06 21:58:30,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:58:30,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-06 21:58:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:30,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932131196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:30,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20] total 30 [2023-11-06 21:58:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695711563] [2023-11-06 21:58:30,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:58:30,753 INFO L87 Difference]: Start difference. First operand 679 states and 889 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:31,966 INFO L93 Difference]: Finished difference Result 1119 states and 1471 transitions. [2023-11-06 21:58:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:31,974 INFO L225 Difference]: With dead ends: 1119 [2023-11-06 21:58:31,974 INFO L226 Difference]: Without dead ends: 1119 [2023-11-06 21:58:31,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:58:31,976 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 414 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:31,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1260 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-11-06 21:58:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 893. [2023-11-06 21:58:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 783 states have (on average 1.4291187739463602) internal successors, (1119), 854 states have internal predecessors, (1119), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 22 states have call predecessors, (64), 32 states have call successors, (64) [2023-11-06 21:58:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1215 transitions. [2023-11-06 21:58:32,006 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1215 transitions. Word has length 53 [2023-11-06 21:58:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:32,007 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1215 transitions. [2023-11-06 21:58:32,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1215 transitions. [2023-11-06 21:58:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:32,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:32,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:32,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:32,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 21:58:32,215 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:32,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1139837490, now seen corresponding path program 1 times [2023-11-06 21:58:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774750846] [2023-11-06 21:58:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774750846] [2023-11-06 21:58:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774750846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:32,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:32,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 21:58:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804390397] [2023-11-06 21:58:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:58:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:58:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:32,676 INFO L87 Difference]: Start difference. First operand 893 states and 1215 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:33,201 INFO L93 Difference]: Finished difference Result 1262 states and 1717 transitions. [2023-11-06 21:58:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:58:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:33,210 INFO L225 Difference]: With dead ends: 1262 [2023-11-06 21:58:33,210 INFO L226 Difference]: Without dead ends: 1262 [2023-11-06 21:58:33,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:58:33,211 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 450 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:33,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 814 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:58:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2023-11-06 21:58:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 947. [2023-11-06 21:58:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 829 states have (on average 1.4246079613992761) internal successors, (1181), 904 states have internal predecessors, (1181), 36 states have call successors, (36), 18 states have call predecessors, (36), 36 states have return successors, (72), 24 states have call predecessors, (72), 36 states have call successors, (72) [2023-11-06 21:58:33,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1289 transitions. [2023-11-06 21:58:33,241 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1289 transitions. Word has length 53 [2023-11-06 21:58:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:33,241 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1289 transitions. [2023-11-06 21:58:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1289 transitions. [2023-11-06 21:58:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:33,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:33,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-11-06 21:58:33,243 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:33,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1139837489, now seen corresponding path program 1 times [2023-11-06 21:58:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046803391] [2023-11-06 21:58:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046803391] [2023-11-06 21:58:33,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046803391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:33,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:33,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 21:58:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537997415] [2023-11-06 21:58:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:33,903 INFO L87 Difference]: Start difference. First operand 947 states and 1289 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:34,862 INFO L93 Difference]: Finished difference Result 1328 states and 1791 transitions. [2023-11-06 21:58:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:58:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:34,871 INFO L225 Difference]: With dead ends: 1328 [2023-11-06 21:58:34,872 INFO L226 Difference]: Without dead ends: 1328 [2023-11-06 21:58:34,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:58:34,873 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 383 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:34,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1214 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2023-11-06 21:58:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 767. [2023-11-06 21:58:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 669 states have (on average 1.4275037369207773) internal successors, (955), 734 states have internal predecessors, (955), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 19 states have call predecessors, (52), 26 states have call successors, (52) [2023-11-06 21:58:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1033 transitions. [2023-11-06 21:58:34,899 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1033 transitions. Word has length 53 [2023-11-06 21:58:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:34,900 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1033 transitions. [2023-11-06 21:58:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1033 transitions. [2023-11-06 21:58:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:34,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:34,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:34,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-11-06 21:58:34,902 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:34,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1137990448, now seen corresponding path program 1 times [2023-11-06 21:58:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624953065] [2023-11-06 21:58:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624953065] [2023-11-06 21:58:35,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624953065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:35,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308422452] [2023-11-06 21:58:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:35,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:35,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:35,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:35,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:35,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 21:58:35,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:36,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:58:36,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:58:36,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:58:36,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:58:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:36,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:36,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308422452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:36,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2023-11-06 21:58:36,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495705639] [2023-11-06 21:58:36,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:36,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:36,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:58:36,981 INFO L87 Difference]: Start difference. First operand 767 states and 1033 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:38,384 INFO L93 Difference]: Finished difference Result 1317 states and 1710 transitions. [2023-11-06 21:58:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:58:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:38,393 INFO L225 Difference]: With dead ends: 1317 [2023-11-06 21:58:38,393 INFO L226 Difference]: Without dead ends: 1317 [2023-11-06 21:58:38,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:58:38,395 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 457 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 2015 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:38,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 2015 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:58:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2023-11-06 21:58:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 833. [2023-11-06 21:58:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 735 states have (on average 1.4190476190476191) internal successors, (1043), 800 states have internal predecessors, (1043), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 19 states have call predecessors, (52), 26 states have call successors, (52) [2023-11-06 21:58:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1121 transitions. [2023-11-06 21:58:38,425 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1121 transitions. Word has length 53 [2023-11-06 21:58:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:38,426 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1121 transitions. [2023-11-06 21:58:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1121 transitions. [2023-11-06 21:58:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:38,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:38,428 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:38,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:38,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 21:58:38,635 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:38,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1137990447, now seen corresponding path program 1 times [2023-11-06 21:58:38,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090529200] [2023-11-06 21:58:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:38,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:41,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090529200] [2023-11-06 21:58:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090529200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826531828] [2023-11-06 21:58:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:41,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:41,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:41,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:58:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:41,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 21:58:41,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:41,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:42,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:58:42,544 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 21:58:42,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:58:42,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:58:43,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:58:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:43,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:43,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826531828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:43,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:43,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [21] total 31 [2023-11-06 21:58:43,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80416978] [2023-11-06 21:58:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:43,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:58:43,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:58:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:58:43,098 INFO L87 Difference]: Start difference. First operand 833 states and 1121 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:44,661 INFO L93 Difference]: Finished difference Result 1376 states and 1787 transitions. [2023-11-06 21:58:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:58:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-11-06 21:58:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:44,667 INFO L225 Difference]: With dead ends: 1376 [2023-11-06 21:58:44,668 INFO L226 Difference]: Without dead ends: 1376 [2023-11-06 21:58:44,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 21:58:44,669 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 511 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:44,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 2188 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:58:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-11-06 21:58:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 833. [2023-11-06 21:58:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 735 states have (on average 1.4190476190476191) internal successors, (1043), 800 states have internal predecessors, (1043), 26 states have call successors, (26), 13 states have call predecessors, (26), 26 states have return successors, (52), 19 states have call predecessors, (52), 26 states have call successors, (52) [2023-11-06 21:58:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1121 transitions. [2023-11-06 21:58:44,710 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1121 transitions. Word has length 53 [2023-11-06 21:58:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:44,710 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1121 transitions. [2023-11-06 21:58:44,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1121 transitions. [2023-11-06 21:58:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:58:44,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:44,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:44,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:44,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:44,919 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:44,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 927151265, now seen corresponding path program 1 times [2023-11-06 21:58:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:44,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101439119] [2023-11-06 21:58:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:44,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:45,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:45,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:45,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101439119] [2023-11-06 21:58:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101439119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:45,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:45,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 21:58:45,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605950877] [2023-11-06 21:58:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:45,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:58:45,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:58:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:58:45,905 INFO L87 Difference]: Start difference. First operand 833 states and 1121 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:46,887 INFO L93 Difference]: Finished difference Result 1479 states and 1947 transitions. [2023-11-06 21:58:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-11-06 21:58:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:46,893 INFO L225 Difference]: With dead ends: 1479 [2023-11-06 21:58:46,893 INFO L226 Difference]: Without dead ends: 1479 [2023-11-06 21:58:46,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:58:46,895 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 545 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:46,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1760 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2023-11-06 21:58:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1050. [2023-11-06 21:58:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 928 states have (on average 1.4385775862068966) internal successors, (1335), 1005 states have internal predecessors, (1335), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 25 states have call predecessors, (76), 38 states have call successors, (76) [2023-11-06 21:58:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1449 transitions. [2023-11-06 21:58:46,930 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1449 transitions. Word has length 54 [2023-11-06 21:58:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:46,930 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1449 transitions. [2023-11-06 21:58:46,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1449 transitions. [2023-11-06 21:58:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:58:46,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:46,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-11-06 21:58:46,933 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:46,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash 984409567, now seen corresponding path program 1 times [2023-11-06 21:58:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:46,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209411657] [2023-11-06 21:58:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:46,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:47,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:47,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209411657] [2023-11-06 21:58:47,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209411657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:47,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:47,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:58:47,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941414701] [2023-11-06 21:58:47,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:47,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:47,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:58:47,273 INFO L87 Difference]: Start difference. First operand 1050 states and 1449 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:47,726 INFO L93 Difference]: Finished difference Result 1497 states and 2058 transitions. [2023-11-06 21:58:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-11-06 21:58:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:47,731 INFO L225 Difference]: With dead ends: 1497 [2023-11-06 21:58:47,731 INFO L226 Difference]: Without dead ends: 1497 [2023-11-06 21:58:47,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:58:47,732 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 209 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:47,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1439 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2023-11-06 21:58:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1248. [2023-11-06 21:58:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1106 states have (on average 1.4665461121157324) internal successors, (1622), 1193 states have internal predecessors, (1622), 48 states have call successors, (48), 24 states have call predecessors, (48), 48 states have return successors, (96), 30 states have call predecessors, (96), 48 states have call successors, (96) [2023-11-06 21:58:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1766 transitions. [2023-11-06 21:58:47,763 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1766 transitions. Word has length 54 [2023-11-06 21:58:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:47,764 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 1766 transitions. [2023-11-06 21:58:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1766 transitions. [2023-11-06 21:58:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:58:47,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:47,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-11-06 21:58:47,765 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:47,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:47,766 INFO L85 PathProgramCache]: Analyzing trace with hash -975225080, now seen corresponding path program 1 times [2023-11-06 21:58:47,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:47,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064341277] [2023-11-06 21:58:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:47,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:48,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:48,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:48,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064341277] [2023-11-06 21:58:48,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064341277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:48,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:48,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 21:58:48,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132002637] [2023-11-06 21:58:48,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:48,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:48,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:48,110 INFO L87 Difference]: Start difference. First operand 1248 states and 1766 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:48,553 INFO L93 Difference]: Finished difference Result 1594 states and 2204 transitions. [2023-11-06 21:58:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:58:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-11-06 21:58:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:48,557 INFO L225 Difference]: With dead ends: 1594 [2023-11-06 21:58:48,558 INFO L226 Difference]: Without dead ends: 1594 [2023-11-06 21:58:48,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:58:48,559 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 472 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:48,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1392 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2023-11-06 21:58:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1038. [2023-11-06 21:58:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 920 states have (on average 1.4554347826086957) internal successors, (1339), 995 states have internal predecessors, (1339), 36 states have call successors, (36), 18 states have call predecessors, (36), 36 states have return successors, (72), 24 states have call predecessors, (72), 36 states have call successors, (72) [2023-11-06 21:58:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1447 transitions. [2023-11-06 21:58:48,589 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1447 transitions. Word has length 54 [2023-11-06 21:58:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:48,589 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1447 transitions. [2023-11-06 21:58:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1447 transitions. [2023-11-06 21:58:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:58:48,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:48,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:48,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-11-06 21:58:48,592 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:48,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -917966778, now seen corresponding path program 1 times [2023-11-06 21:58:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:48,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094754603] [2023-11-06 21:58:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:48,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:48,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:48,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094754603] [2023-11-06 21:58:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094754603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:48,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:58:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977079014] [2023-11-06 21:58:48,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:48,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:58:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:58:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:48,858 INFO L87 Difference]: Start difference. First operand 1038 states and 1447 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:49,268 INFO L93 Difference]: Finished difference Result 1308 states and 1780 transitions. [2023-11-06 21:58:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:58:49,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-11-06 21:58:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:49,273 INFO L225 Difference]: With dead ends: 1308 [2023-11-06 21:58:49,273 INFO L226 Difference]: Without dead ends: 1308 [2023-11-06 21:58:49,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:49,274 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 168 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:49,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1315 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-06 21:58:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 877. [2023-11-06 21:58:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 775 states have (on average 1.4270967741935483) internal successors, (1106), 842 states have internal predecessors, (1106), 28 states have call successors, (28), 14 states have call predecessors, (28), 28 states have return successors, (56), 20 states have call predecessors, (56), 28 states have call successors, (56) [2023-11-06 21:58:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1190 transitions. [2023-11-06 21:58:49,301 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1190 transitions. Word has length 54 [2023-11-06 21:58:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:49,302 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1190 transitions. [2023-11-06 21:58:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1190 transitions. [2023-11-06 21:58:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:58:49,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:49,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:49,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-11-06 21:58:49,304 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:49,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:49,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1935592645, now seen corresponding path program 1 times [2023-11-06 21:58:49,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969994272] [2023-11-06 21:58:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:49,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:50,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:50,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969994272] [2023-11-06 21:58:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969994272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:50,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-06 21:58:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319670735] [2023-11-06 21:58:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:50,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:58:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:58:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:58:50,339 INFO L87 Difference]: Start difference. First operand 877 states and 1190 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:51,415 INFO L93 Difference]: Finished difference Result 1522 states and 2012 transitions. [2023-11-06 21:58:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:58:51,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-11-06 21:58:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:51,421 INFO L225 Difference]: With dead ends: 1522 [2023-11-06 21:58:51,421 INFO L226 Difference]: Without dead ends: 1522 [2023-11-06 21:58:51,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:58:51,422 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 664 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:51,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1451 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2023-11-06 21:58:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1099. [2023-11-06 21:58:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 973 states have (on average 1.4429599177800616) internal successors, (1404), 1052 states have internal predecessors, (1404), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 26 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-06 21:58:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1524 transitions. [2023-11-06 21:58:51,453 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1524 transitions. Word has length 56 [2023-11-06 21:58:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:51,454 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1524 transitions. [2023-11-06 21:58:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1524 transitions. [2023-11-06 21:58:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:58:51,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:51,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:51,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-11-06 21:58:51,456 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:51,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1126246019, now seen corresponding path program 1 times [2023-11-06 21:58:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:51,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087527798] [2023-11-06 21:58:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:51,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:51,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:51,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087527798] [2023-11-06 21:58:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087527798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:58:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499457293] [2023-11-06 21:58:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:51,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:58:51,831 INFO L87 Difference]: Start difference. First operand 1099 states and 1524 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:52,366 INFO L93 Difference]: Finished difference Result 1549 states and 2136 transitions. [2023-11-06 21:58:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:58:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-11-06 21:58:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:52,371 INFO L225 Difference]: With dead ends: 1549 [2023-11-06 21:58:52,371 INFO L226 Difference]: Without dead ends: 1549 [2023-11-06 21:58:52,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:58:52,376 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 204 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:52,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1016 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:58:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2023-11-06 21:58:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1300. [2023-11-06 21:58:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1154 states have (on average 1.4714038128249567) internal successors, (1698), 1243 states have internal predecessors, (1698), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 31 states have call predecessors, (100), 50 states have call successors, (100) [2023-11-06 21:58:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1848 transitions. [2023-11-06 21:58:52,416 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1848 transitions. Word has length 56 [2023-11-06 21:58:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:52,417 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1848 transitions. [2023-11-06 21:58:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1848 transitions. [2023-11-06 21:58:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 21:58:52,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:52,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:52,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-11-06 21:58:52,419 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:52,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1718684918, now seen corresponding path program 1 times [2023-11-06 21:58:52,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906456882] [2023-11-06 21:58:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-06 21:58:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:58:52,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906456882] [2023-11-06 21:58:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906456882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:52,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:52,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720658960] [2023-11-06 21:58:52,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:52,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:52,627 INFO L87 Difference]: Start difference. First operand 1300 states and 1848 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 21:58:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:52,690 INFO L93 Difference]: Finished difference Result 1299 states and 1831 transitions. [2023-11-06 21:58:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2023-11-06 21:58:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:52,694 INFO L225 Difference]: With dead ends: 1299 [2023-11-06 21:58:52,695 INFO L226 Difference]: Without dead ends: 1299 [2023-11-06 21:58:52,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:52,696 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 130 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:52,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 521 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2023-11-06 21:58:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1299. [2023-11-06 21:58:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1154 states have (on average 1.4566724436741767) internal successors, (1681), 1242 states have internal predecessors, (1681), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 31 states have call predecessors, (100), 50 states have call successors, (100) [2023-11-06 21:58:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1831 transitions. [2023-11-06 21:58:52,727 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1831 transitions. Word has length 57 [2023-11-06 21:58:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:52,727 INFO L495 AbstractCegarLoop]: Abstraction has 1299 states and 1831 transitions. [2023-11-06 21:58:52,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 21:58:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1831 transitions. [2023-11-06 21:58:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:58:52,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:52,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:52,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-11-06 21:58:52,730 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:52,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash -886974100, now seen corresponding path program 1 times [2023-11-06 21:58:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619678629] [2023-11-06 21:58:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:53,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619678629] [2023-11-06 21:58:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619678629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:53,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:53,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 21:58:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708600167] [2023-11-06 21:58:53,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:53,191 INFO L87 Difference]: Start difference. First operand 1299 states and 1831 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:53,803 INFO L93 Difference]: Finished difference Result 1649 states and 2273 transitions. [2023-11-06 21:58:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:58:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-11-06 21:58:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:53,808 INFO L225 Difference]: With dead ends: 1649 [2023-11-06 21:58:53,809 INFO L226 Difference]: Without dead ends: 1649 [2023-11-06 21:58:53,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:58:53,812 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 326 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:53,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1045 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:58:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2023-11-06 21:58:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1089. [2023-11-06 21:58:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 968 states have (on average 1.4483471074380165) internal successors, (1402), 1044 states have internal predecessors, (1402), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 25 states have call predecessors, (76), 38 states have call successors, (76) [2023-11-06 21:58:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1516 transitions. [2023-11-06 21:58:53,845 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1516 transitions. Word has length 56 [2023-11-06 21:58:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:53,845 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 1516 transitions. [2023-11-06 21:58:53,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1516 transitions. [2023-11-06 21:58:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:58:53,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:53,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:53,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-11-06 21:58:53,847 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:53,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1696320726, now seen corresponding path program 1 times [2023-11-06 21:58:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548649481] [2023-11-06 21:58:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548649481] [2023-11-06 21:58:54,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548649481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:54,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428927589] [2023-11-06 21:58:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:54,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:54,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:54,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:58:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 21:58:54,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:55,459 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:58:55,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:58:55,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:58:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:55,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428927589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:55,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:55,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2023-11-06 21:58:55,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510445445] [2023-11-06 21:58:55,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:55,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:58:55,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:58:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:58:55,779 INFO L87 Difference]: Start difference. First operand 1089 states and 1516 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:56,764 INFO L93 Difference]: Finished difference Result 1599 states and 2135 transitions. [2023-11-06 21:58:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:58:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-11-06 21:58:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:56,770 INFO L225 Difference]: With dead ends: 1599 [2023-11-06 21:58:56,770 INFO L226 Difference]: Without dead ends: 1599 [2023-11-06 21:58:56,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:58:56,771 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 477 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:56,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 2024 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:58:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2023-11-06 21:58:56,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1010. [2023-11-06 21:58:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 897 states have (on average 1.4414715719063544) internal successors, (1293), 969 states have internal predecessors, (1293), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 23 states have call predecessors, (68), 34 states have call successors, (68) [2023-11-06 21:58:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1395 transitions. [2023-11-06 21:58:56,808 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1395 transitions. Word has length 56 [2023-11-06 21:58:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:56,809 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1395 transitions. [2023-11-06 21:58:56,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 21:58:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1395 transitions. [2023-11-06 21:58:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 21:58:56,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:56,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:56,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:57,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:57,019 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:57,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1739624693, now seen corresponding path program 1 times [2023-11-06 21:58:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980161709] [2023-11-06 21:58:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-06 21:58:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:58:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980161709] [2023-11-06 21:58:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980161709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:57,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-06 21:58:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349570166] [2023-11-06 21:58:57,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:58:57,804 INFO L87 Difference]: Start difference. First operand 1010 states and 1395 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:58:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:58,770 INFO L93 Difference]: Finished difference Result 1325 states and 1794 transitions. [2023-11-06 21:58:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:58:58,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-11-06 21:58:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:58,775 INFO L225 Difference]: With dead ends: 1325 [2023-11-06 21:58:58,775 INFO L226 Difference]: Without dead ends: 1323 [2023-11-06 21:58:58,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:58:58,776 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 296 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:58,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1670 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:58:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2023-11-06 21:58:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1099. [2023-11-06 21:58:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 974 states have (on average 1.4435318275154003) internal successors, (1406), 1052 states have internal predecessors, (1406), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 26 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-06 21:58:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1526 transitions. [2023-11-06 21:58:58,806 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1526 transitions. Word has length 58 [2023-11-06 21:58:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:58,807 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1526 transitions. [2023-11-06 21:58:58,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:58:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1526 transitions. [2023-11-06 21:58:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 21:58:58,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:58,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:58,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-11-06 21:58:58,809 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:58:58,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1949478456, now seen corresponding path program 1 times [2023-11-06 21:58:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:58,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660013493] [2023-11-06 21:58:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:58:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:58:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:58:59,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660013493] [2023-11-06 21:58:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660013493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082753744] [2023-11-06 21:58:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:59,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:59,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:59:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:00,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 21:59:00,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:00,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:00,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:59:00,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:59:01,022 INFO L322 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-06 21:59:01,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-06 21:59:01,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:59:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:01,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082753744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:01,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:01,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2023-11-06 21:59:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769730560] [2023-11-06 21:59:01,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:59:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:59:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-11-06 21:59:01,298 INFO L87 Difference]: Start difference. First operand 1099 states and 1526 transitions. Second operand has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:03,633 INFO L93 Difference]: Finished difference Result 1544 states and 2085 transitions. [2023-11-06 21:59:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:59:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2023-11-06 21:59:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:03,638 INFO L225 Difference]: With dead ends: 1544 [2023-11-06 21:59:03,639 INFO L226 Difference]: Without dead ends: 1544 [2023-11-06 21:59:03,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 21:59:03,640 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 823 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:03,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 2570 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:59:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2023-11-06 21:59:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1119. [2023-11-06 21:59:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 994 states have (on average 1.4416498993963782) internal successors, (1433), 1070 states have internal predecessors, (1433), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-06 21:59:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1553 transitions. [2023-11-06 21:59:03,670 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1553 transitions. Word has length 58 [2023-11-06 21:59:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:03,671 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1553 transitions. [2023-11-06 21:59:03,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1553 transitions. [2023-11-06 21:59:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 21:59:03,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:03,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:03,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-06 21:59:03,880 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:03,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1949478457, now seen corresponding path program 1 times [2023-11-06 21:59:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:03,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332597999] [2023-11-06 21:59:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:05,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:05,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:59:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332597999] [2023-11-06 21:59:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332597999] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891403456] [2023-11-06 21:59:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:05,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:05,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:05,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:05,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:59:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:06,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-06 21:59:06,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:06,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:06,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:07,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:59:07,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:59:07,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 21:59:07,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-11-06 21:59:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:07,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:59:07,636 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 21:59:07,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 21:59:07,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:59:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:07,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891403456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:08,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:08,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2023-11-06 21:59:08,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316423254] [2023-11-06 21:59:08,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 21:59:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 21:59:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 21:59:08,375 INFO L87 Difference]: Start difference. First operand 1119 states and 1553 transitions. Second operand has 33 states, 32 states have (on average 3.25) internal successors, (104), 30 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:13,653 INFO L93 Difference]: Finished difference Result 1808 states and 2396 transitions. [2023-11-06 21:59:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 21:59:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.25) internal successors, (104), 30 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2023-11-06 21:59:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:13,662 INFO L225 Difference]: With dead ends: 1808 [2023-11-06 21:59:13,662 INFO L226 Difference]: Without dead ends: 1808 [2023-11-06 21:59:13,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=876, Invalid=4976, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 21:59:13,664 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 993 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:13,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 2774 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 21:59:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2023-11-06 21:59:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1119. [2023-11-06 21:59:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 994 states have (on average 1.4396378269617707) internal successors, (1431), 1070 states have internal predecessors, (1431), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-06 21:59:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1551 transitions. [2023-11-06 21:59:13,695 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1551 transitions. Word has length 58 [2023-11-06 21:59:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:13,695 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1551 transitions. [2023-11-06 21:59:13,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.25) internal successors, (104), 30 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1551 transitions. [2023-11-06 21:59:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 21:59:13,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:13,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:13,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 21:59:13,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-06 21:59:13,905 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:13,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash 193064434, now seen corresponding path program 1 times [2023-11-06 21:59:13,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:13,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750509026] [2023-11-06 21:59:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:14,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-06 21:59:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:14,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750509026] [2023-11-06 21:59:14,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750509026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:14,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:14,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-06 21:59:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041213464] [2023-11-06 21:59:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:59:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:59:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:59:14,725 INFO L87 Difference]: Start difference. First operand 1119 states and 1551 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:59:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:15,737 INFO L93 Difference]: Finished difference Result 1440 states and 1954 transitions. [2023-11-06 21:59:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:59:15,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-11-06 21:59:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:15,741 INFO L225 Difference]: With dead ends: 1440 [2023-11-06 21:59:15,741 INFO L226 Difference]: Without dead ends: 1436 [2023-11-06 21:59:15,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:59:15,742 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 332 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:15,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1790 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:59:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2023-11-06 21:59:15,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1113. [2023-11-06 21:59:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 988 states have (on average 1.4362348178137652) internal successors, (1419), 1064 states have internal predecessors, (1419), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2023-11-06 21:59:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1539 transitions. [2023-11-06 21:59:15,768 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1539 transitions. Word has length 58 [2023-11-06 21:59:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:15,769 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 1539 transitions. [2023-11-06 21:59:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 21:59:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1539 transitions. [2023-11-06 21:59:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:15,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:15,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:15,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-11-06 21:59:15,771 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:15,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -411669398, now seen corresponding path program 1 times [2023-11-06 21:59:15,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686812160] [2023-11-06 21:59:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:15,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:59:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:16,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:16,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686812160] [2023-11-06 21:59:16,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686812160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616697868] [2023-11-06 21:59:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:16,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:16,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:16,478 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:59:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 21:59:16,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:16,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:17,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:59:17,742 INFO L322 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2023-11-06 21:59:17,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-11-06 21:59:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:59:17,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-06 21:59:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:17,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616697868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:18,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:18,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2023-11-06 21:59:18,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873680559] [2023-11-06 21:59:18,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:18,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:59:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:59:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:59:18,109 INFO L87 Difference]: Start difference. First operand 1113 states and 1539 transitions. Second operand has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:20,100 INFO L93 Difference]: Finished difference Result 1488 states and 2027 transitions. [2023-11-06 21:59:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:59:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-11-06 21:59:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:20,104 INFO L225 Difference]: With dead ends: 1488 [2023-11-06 21:59:20,104 INFO L226 Difference]: Without dead ends: 1488 [2023-11-06 21:59:20,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 21:59:20,106 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 661 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:20,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 2729 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1803 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:59:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2023-11-06 21:59:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1185. [2023-11-06 21:59:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1052 states have (on average 1.4277566539923954) internal successors, (1502), 1130 states have internal predecessors, (1502), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 32 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-06 21:59:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1634 transitions. [2023-11-06 21:59:20,135 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1634 transitions. Word has length 59 [2023-11-06 21:59:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:20,136 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1634 transitions. [2023-11-06 21:59:20,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 22 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1634 transitions. [2023-11-06 21:59:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:20,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:20,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:20,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:20,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:20,349 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:20,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:20,349 INFO L85 PathProgramCache]: Analyzing trace with hash -411669397, now seen corresponding path program 1 times [2023-11-06 21:59:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:20,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032713615] [2023-11-06 21:59:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:59:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032713615] [2023-11-06 21:59:21,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032713615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862614685] [2023-11-06 21:59:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:21,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:21,409 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:21,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:21,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-06 21:59:21,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:21,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:21,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:22,515 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 21:59:22,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:59:22,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:22,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:59:22,997 INFO L322 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-11-06 21:59:22,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-06 21:59:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:59:23,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-06 21:59:23,312 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:59:23,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-11-06 21:59:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:23,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:23,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862614685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:23,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:23,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-06 21:59:23,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263623602] [2023-11-06 21:59:23,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:23,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:59:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:23,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:59:23,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:59:23,701 INFO L87 Difference]: Start difference. First operand 1185 states and 1634 transitions. Second operand has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:26,238 INFO L93 Difference]: Finished difference Result 1501 states and 2043 transitions. [2023-11-06 21:59:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:59:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-11-06 21:59:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:26,247 INFO L225 Difference]: With dead ends: 1501 [2023-11-06 21:59:26,247 INFO L226 Difference]: Without dead ends: 1501 [2023-11-06 21:59:26,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 21:59:26,248 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 738 mSDsluCounter, 2230 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:26,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 2403 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 21:59:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2023-11-06 21:59:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1185. [2023-11-06 21:59:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1052 states have (on average 1.4258555133079849) internal successors, (1500), 1130 states have internal predecessors, (1500), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 32 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-06 21:59:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1632 transitions. [2023-11-06 21:59:26,274 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1632 transitions. Word has length 59 [2023-11-06 21:59:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:26,274 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1632 transitions. [2023-11-06 21:59:26,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1632 transitions. [2023-11-06 21:59:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:26,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:26,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:26,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:26,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-06 21:59:26,484 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:26,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash -627848605, now seen corresponding path program 1 times [2023-11-06 21:59:26,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:26,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195831053] [2023-11-06 21:59:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:28,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:29,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:59:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:29,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:29,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195831053] [2023-11-06 21:59:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195831053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:29,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195557431] [2023-11-06 21:59:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:29,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:29,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:29,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:29,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:59:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:29,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-06 21:59:29,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:29,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:29,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 21:59:30,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:59:30,378 INFO L322 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-06 21:59:30,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-06 21:59:30,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:59:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:30,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195557431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:30,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 31 [2023-11-06 21:59:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719200887] [2023-11-06 21:59:30,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 21:59:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 21:59:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:59:30,628 INFO L87 Difference]: Start difference. First operand 1185 states and 1632 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:35,155 INFO L93 Difference]: Finished difference Result 1601 states and 2125 transitions. [2023-11-06 21:59:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:59:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-11-06 21:59:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:35,160 INFO L225 Difference]: With dead ends: 1601 [2023-11-06 21:59:35,161 INFO L226 Difference]: Without dead ends: 1601 [2023-11-06 21:59:35,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=470, Invalid=2836, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 21:59:35,162 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 870 mSDsluCounter, 4386 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 4667 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:35,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 4667 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3446 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-06 21:59:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-11-06 21:59:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1207. [2023-11-06 21:59:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1074 states have (on average 1.4236499068901303) internal successors, (1529), 1150 states have internal predecessors, (1529), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 34 states have call predecessors, (88), 44 states have call successors, (88) [2023-11-06 21:59:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1661 transitions. [2023-11-06 21:59:35,192 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1661 transitions. Word has length 59 [2023-11-06 21:59:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:35,192 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 1661 transitions. [2023-11-06 21:59:35,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1661 transitions. [2023-11-06 21:59:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:35,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:35,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:35,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 21:59:35,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-06 21:59:35,402 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:35,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash -627848604, now seen corresponding path program 1 times [2023-11-06 21:59:35,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:35,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66161379] [2023-11-06 21:59:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:36,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-06 21:59:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66161379] [2023-11-06 21:59:36,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66161379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:36,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560310308] [2023-11-06 21:59:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:36,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:36,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:36,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:59:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:36,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-06 21:59:36,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:36,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:59:37,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:37,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:59:37,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:59:37,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-11-06 21:59:37,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:59:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:38,050 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-06 21:59:38,064 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 21:59:38,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-06 21:59:38,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 21:59:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:38,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560310308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:38,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:38,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-06 21:59:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617066145] [2023-11-06 21:59:38,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:59:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:59:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:59:38,517 INFO L87 Difference]: Start difference. First operand 1207 states and 1661 transitions. Second operand has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:40,640 INFO L93 Difference]: Finished difference Result 1704 states and 2278 transitions. [2023-11-06 21:59:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:59:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2023-11-06 21:59:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:40,644 INFO L225 Difference]: With dead ends: 1704 [2023-11-06 21:59:40,644 INFO L226 Difference]: Without dead ends: 1704 [2023-11-06 21:59:40,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:59:40,645 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 971 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:40,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 2930 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:59:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2023-11-06 21:59:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1181. [2023-11-06 21:59:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1052 states have (on average 1.4287072243346008) internal successors, (1503), 1126 states have internal predecessors, (1503), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 33 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-06 21:59:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1629 transitions. [2023-11-06 21:59:40,674 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1629 transitions. Word has length 59 [2023-11-06 21:59:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:40,675 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1629 transitions. [2023-11-06 21:59:40,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 21:59:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1629 transitions. [2023-11-06 21:59:40,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:40,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:40,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:40,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:40,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-06 21:59:40,884 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-11-06 21:59:40,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash -990115430, now seen corresponding path program 1 times [2023-11-06 21:59:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214706034] [2023-11-06 21:59:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 21:59:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:43,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214706034] [2023-11-06 21:59:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214706034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203588628] [2023-11-06 21:59:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:43,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:43,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad41e032-e595-4d8a-856e-db3f0cbcad7b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:59:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:43,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-06 21:59:43,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:44,094 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 21:59:44,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 21:59:44,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:59:44,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:59:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:44,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-06 21:59:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:44,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-06 21:59:44,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:59:44,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 21:59:45,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:45,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:45,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-06 21:59:45,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:59:45,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 21:59:45,513 INFO L322 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2023-11-06 21:59:45,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 32 [2023-11-06 21:59:45,968 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:45,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2023-11-06 21:59:45,985 INFO L322 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2023-11-06 21:59:45,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 22 [2023-11-06 21:59:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:46,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:46,362 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| 4))) (and (forall ((v_ArrVal_1810 (Array Int Int)) (v_ArrVal_1808 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1810) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1808)) |c_~#list~0.base|) |c_~#list~0.offset|)) 4) 0)) (forall ((v_ArrVal_1808 Int)) (= (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1808)))) (select .cse2 (select (select .cse2 |c_~#list~0.base|) |c_~#list~0.offset|))) 4) 0)))) is different from false [2023-11-06 21:59:49,035 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:49,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1052 treesize of output 1058 [2023-11-06 21:59:49,429 INFO L322 Elim1Store]: treesize reduction 164, result has 57.4 percent of original size [2023-11-06 21:59:49,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 16540 treesize of output 16198 [2023-11-06 21:59:50,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6902 treesize of output 6774 [2023-11-06 21:59:50,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6774 treesize of output 6518 [2023-11-06 21:59:51,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17794 treesize of output 17098