./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 970cab0a23b690f163a0a51afef8881644c6447187bc11bbe1f60a2a40cf01a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:52,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:52,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:08:52,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:52,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:52,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:52,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:52,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:52,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:52,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:52,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:52,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:52,465 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:52,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:52,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:52,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:52,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:52,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:52,468 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:08:52,469 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:08:52,469 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:08:52,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:52,471 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:08:52,471 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:08:52,472 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:52,472 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:52,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:52,473 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:52,473 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:52,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:52,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:52,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:52,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:52,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:52,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:52,476 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:52,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:52,476 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:52,476 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_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 970cab0a23b690f163a0a51afef8881644c6447187bc11bbe1f60a2a40cf01a7 [2023-11-12 02:08:52,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:52,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:52,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:52,822 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:52,823 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:52,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2023-11-12 02:08:55,980 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:56,180 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:56,181 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/sv-benchmarks/c/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2023-11-12 02:08:56,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/data/c48a4befd/2d0d92fb0ad5441a9f110589ee68a5e0/FLAG6dda439b5 [2023-11-12 02:08:56,208 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/data/c48a4befd/2d0d92fb0ad5441a9f110589ee68a5e0 [2023-11-12 02:08:56,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:56,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:56,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:56,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:56,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:56,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f53a200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56, skipping insertion in model container [2023-11-12 02:08:56,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,247 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:56,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:56,452 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:56,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:56,509 WARN L672 CHandler]: The function strncpy is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:08:56,520 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:56,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56 WrapperNode [2023-11-12 02:08:56,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:56,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:56,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:56,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:56,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,570 INFO L138 Inliner]: procedures = 42, calls = 31, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 156 [2023-11-12 02:08:56,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:56,571 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:56,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:56,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:56,582 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,598 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,602 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:56,606 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:56,606 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:56,606 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:56,607 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (1/1) ... [2023-11-12 02:08:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:56,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:56,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:56,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:08:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:08:56,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:08:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-11-12 02:08:56,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:56,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:56,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:08:56,781 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:56,783 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:57,256 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:57,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:57,264 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:08:57,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:57 BoogieIcfgContainer [2023-11-12 02:08:57,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:57,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:57,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:57,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:57,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:56" (1/3) ... [2023-11-12 02:08:57,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a015bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:57, skipping insertion in model container [2023-11-12 02:08:57,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:56" (2/3) ... [2023-11-12 02:08:57,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a015bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:57, skipping insertion in model container [2023-11-12 02:08:57,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:57" (3/3) ... [2023-11-12 02:08:57,277 INFO L112 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2023-11-12 02:08:57,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:57,299 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-11-12 02:08:57,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:57,367 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;@571ff484, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:57,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-12 02:08:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 55 states have (on average 1.8) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:08:57,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:57,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:08:57,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:57,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2023-11-12 02:08:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943831070] [2023-11-12 02:08:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:57,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943831070] [2023-11-12 02:08:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943831070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:57,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100700466] [2023-11-12 02:08:57,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:57,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:57,697 INFO L87 Difference]: Start difference. First operand has 80 states, 55 states have (on average 1.8) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:57,799 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2023-11-12 02:08:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:08:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:57,816 INFO L225 Difference]: With dead ends: 77 [2023-11-12 02:08:57,816 INFO L226 Difference]: Without dead ends: 75 [2023-11-12 02:08:57,818 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 [2023-11-12 02:08:57,823 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 78 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:57,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 64 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-12 02:08:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-12 02:08:57,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-11-12 02:08:57,872 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 4 [2023-11-12 02:08:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:57,873 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-11-12 02:08:57,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-11-12 02:08:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:08:57,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:57,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:08:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:08:57,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:57,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2023-11-12 02:08:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349030885] [2023-11-12 02:08:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:58,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:58,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349030885] [2023-11-12 02:08:58,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349030885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:58,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:58,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324070339] [2023-11-12 02:08:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:58,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:58,062 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:58,142 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-11-12 02:08:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:08:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:58,144 INFO L225 Difference]: With dead ends: 79 [2023-11-12 02:08:58,145 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 02:08:58,145 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 [2023-11-12 02:08:58,147 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:58,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 02:08:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-12 02:08:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2023-11-12 02:08:58,157 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 4 [2023-11-12 02:08:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:58,157 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2023-11-12 02:08:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2023-11-12 02:08:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 02:08:58,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:58,158 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:08:58,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:58,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2023-11-12 02:08:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416949462] [2023-11-12 02:08:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:58,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416949462] [2023-11-12 02:08:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416949462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:08:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316716044] [2023-11-12 02:08:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:58,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:58,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:58,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:08:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:58,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:08:58,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:58,583 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 [2023-11-12 02:08:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:58,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316716044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:58,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:08:58,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:08:58,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901821217] [2023-11-12 02:08:58,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:58,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:08:58,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:08:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:08:58,821 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:59,026 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2023-11-12 02:08:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:08:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 02:08:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:59,035 INFO L225 Difference]: With dead ends: 91 [2023-11-12 02:08:59,036 INFO L226 Difference]: Without dead ends: 91 [2023-11-12 02:08:59,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:08:59,038 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 11 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:59,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 202 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-12 02:08:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-11-12 02:08:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 88 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-11-12 02:08:59,048 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 8 [2023-11-12 02:08:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:59,055 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-11-12 02:08:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-11-12 02:08:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 02:08:59,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:59,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 02:08:59,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:59,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:59,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:59,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:59,263 INFO L85 PathProgramCache]: Analyzing trace with hash -4646110, now seen corresponding path program 1 times [2023-11-12 02:08:59,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:59,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778227540] [2023-11-12 02:08:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:08:59,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:59,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778227540] [2023-11-12 02:08:59,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778227540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:59,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:59,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015834637] [2023-11-12 02:08:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:59,363 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:59,410 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2023-11-12 02:08:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 02:08:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:59,411 INFO L225 Difference]: With dead ends: 88 [2023-11-12 02:08:59,412 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:08:59,413 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 [2023-11-12 02:08:59,422 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:59,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 140 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:08:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:08:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.537313432835821) internal successors, (103), 87 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2023-11-12 02:08:59,432 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 13 [2023-11-12 02:08:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:59,433 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2023-11-12 02:08:59,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2023-11-12 02:08:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:08:59,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:59,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:59,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:08:59,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash -108924891, now seen corresponding path program 1 times [2023-11-12 02:08:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:59,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36870539] [2023-11-12 02:08:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:08:59,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:59,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36870539] [2023-11-12 02:08:59,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36870539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:59,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:59,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:08:59,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578955791] [2023-11-12 02:08:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:59,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:08:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:08:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:59,526 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:59,594 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2023-11-12 02:08:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:08:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 02:08:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:59,596 INFO L225 Difference]: With dead ends: 88 [2023-11-12 02:08:59,596 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:08:59,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:59,597 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:59,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:08:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:08:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:08:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 87 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2023-11-12 02:08:59,623 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 17 [2023-11-12 02:08:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:59,623 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2023-11-12 02:08:59,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2023-11-12 02:08:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 02:08:59,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:59,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:59,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:08:59,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:08:59,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:59,627 INFO L85 PathProgramCache]: Analyzing trace with hash -108927737, now seen corresponding path program 1 times [2023-11-12 02:08:59,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:59,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572339942] [2023-11-12 02:08:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:59,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572339942] [2023-11-12 02:08:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572339942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:08:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27421846] [2023-11-12 02:08:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:59,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:59,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:59,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:59,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:08:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:59,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:08:59,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:59,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27421846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:59,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:08:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:08:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627449492] [2023-11-12 02:08:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:08:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:08:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:08:59,936 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:59,983 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2023-11-12 02:08:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:08:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-12 02:08:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:59,985 INFO L225 Difference]: With dead ends: 96 [2023-11-12 02:08:59,985 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:08:59,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:08:59,987 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:59,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 244 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:08:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2023-11-12 02:08:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2023-11-12 02:08:59,995 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 17 [2023-11-12 02:08:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:59,996 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2023-11-12 02:08:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2023-11-12 02:08:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 02:08:59,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:59,997 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2023-11-12 02:09:00,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:00,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:00,204 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:00,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2023-11-12 02:09:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31997969] [2023-11-12 02:09:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:00,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31997969] [2023-11-12 02:09:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31997969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063907034] [2023-11-12 02:09:00,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:00,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:00,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:00,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:09:00,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:09:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:00,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:09:00,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:00,566 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 [2023-11-12 02:09:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:00,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:00,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063907034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:00,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:00,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-11-12 02:09:00,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884090251] [2023-11-12 02:09:00,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:09:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:09:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:09:00,821 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:00,936 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2023-11-12 02:09:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:09:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 02:09:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:00,938 INFO L225 Difference]: With dead ends: 94 [2023-11-12 02:09:00,938 INFO L226 Difference]: Without dead ends: 94 [2023-11-12 02:09:00,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:09:00,940 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:00,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 259 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-12 02:09:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-12 02:09:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-11-12 02:09:00,950 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 20 [2023-11-12 02:09:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:00,950 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-11-12 02:09:00,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-11-12 02:09:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:09:00,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:00,953 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:00,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 02:09:01,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:09:01,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:01,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 150695803, now seen corresponding path program 2 times [2023-11-12 02:09:01,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227980929] [2023-11-12 02:09:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:01,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227980929] [2023-11-12 02:09:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227980929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:01,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816341959] [2023-11-12 02:09:01,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:01,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:01,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:01,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:09:01,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:09:01,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:01,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:09:01,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:01,434 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 [2023-11-12 02:09:01,561 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:09:01,561 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 19 treesize of output 16 [2023-11-12 02:09:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-12 02:09:01,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816341959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:01,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:01,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-11-12 02:09:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138929358] [2023-11-12 02:09:01,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:01,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:09:01,586 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:01,665 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2023-11-12 02:09:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:09:01,666 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), 0 states have call successors, (0), 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 33 [2023-11-12 02:09:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:01,667 INFO L225 Difference]: With dead ends: 86 [2023-11-12 02:09:01,668 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 02:09:01,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:09:01,670 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 122 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:01,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 56 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 02:09:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-12 02:09:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-11-12 02:09:01,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 33 [2023-11-12 02:09:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:01,687 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-11-12 02:09:01,687 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-11-12 02:09:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:09:01,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:01,688 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:01,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:01,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:01,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:01,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash 150695804, now seen corresponding path program 1 times [2023-11-12 02:09:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:01,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772616658] [2023-11-12 02:09:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772616658] [2023-11-12 02:09:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772616658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746608747] [2023-11-12 02:09:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:02,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:02,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:09:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:02,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:09:02,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:02,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:02,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746608747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:02,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:02,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-11-12 02:09:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685043992] [2023-11-12 02:09:02,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:02,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:09:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:09:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:09:02,326 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:02,373 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2023-11-12 02:09:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:09:02,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-12 02:09:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:02,375 INFO L225 Difference]: With dead ends: 94 [2023-11-12 02:09:02,375 INFO L226 Difference]: Without dead ends: 94 [2023-11-12 02:09:02,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:09:02,376 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 292 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-12 02:09:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-12 02:09:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-11-12 02:09:02,381 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 33 [2023-11-12 02:09:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:02,381 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-11-12 02:09:02,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-11-12 02:09:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 02:09:02,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:02,383 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:02,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:02,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:02,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash -629609034, now seen corresponding path program 2 times [2023-11-12 02:09:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:02,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068167512] [2023-11-12 02:09:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:02,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068167512] [2023-11-12 02:09:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068167512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:02,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731450940] [2023-11-12 02:09:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:03,000 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:03,196 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2023-11-12 02:09:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:09:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 41 [2023-11-12 02:09:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:03,198 INFO L225 Difference]: With dead ends: 146 [2023-11-12 02:09:03,198 INFO L226 Difference]: Without dead ends: 146 [2023-11-12 02:09:03,199 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 [2023-11-12 02:09:03,199 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 189 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:03,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 135 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-12 02:09:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2023-11-12 02:09:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2023-11-12 02:09:03,204 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 41 [2023-11-12 02:09:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:03,204 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2023-11-12 02:09:03,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2023-11-12 02:09:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:09:03,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:03,206 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:03,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:09:03,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:03,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -560573000, now seen corresponding path program 1 times [2023-11-12 02:09:03,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:03,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168618557] [2023-11-12 02:09:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:03,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:03,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168618557] [2023-11-12 02:09:03,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168618557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:03,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:03,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419965464] [2023-11-12 02:09:03,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:03,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:03,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:03,380 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:03,559 INFO L93 Difference]: Finished difference Result 212 states and 272 transitions. [2023-11-12 02:09:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 44 [2023-11-12 02:09:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:03,562 INFO L225 Difference]: With dead ends: 212 [2023-11-12 02:09:03,562 INFO L226 Difference]: Without dead ends: 212 [2023-11-12 02:09:03,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:09:03,563 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 258 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:03,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 175 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-12 02:09:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 153. [2023-11-12 02:09:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.3687943262411348) internal successors, (193), 152 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 193 transitions. [2023-11-12 02:09:03,571 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 193 transitions. Word has length 44 [2023-11-12 02:09:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:03,571 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 193 transitions. [2023-11-12 02:09:03,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 193 transitions. [2023-11-12 02:09:03,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:09:03,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:03,573 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:03,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:09:03,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:03,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash 935128925, now seen corresponding path program 1 times [2023-11-12 02:09:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099209083] [2023-11-12 02:09:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099209083] [2023-11-12 02:09:03,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099209083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704677248] [2023-11-12 02:09:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:03,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:03,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:03,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:03,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:09:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:04,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:09:04,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:04,064 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 [2023-11-12 02:09:04,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:09:04,270 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 14 treesize of output 9 [2023-11-12 02:09:04,283 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:09:04,283 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 [2023-11-12 02:09:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:04,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:04,645 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 49 treesize of output 45 [2023-11-12 02:09:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704677248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:05,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-12 02:09:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048789164] [2023-11-12 02:09:05,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:09:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:09:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:09:05,019 INFO L87 Difference]: Start difference. First operand 153 states and 193 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:05,658 INFO L93 Difference]: Finished difference Result 367 states and 447 transitions. [2023-11-12 02:09:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:09:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 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 48 [2023-11-12 02:09:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:05,662 INFO L225 Difference]: With dead ends: 367 [2023-11-12 02:09:05,662 INFO L226 Difference]: Without dead ends: 367 [2023-11-12 02:09:05,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=565, Unknown=0, NotChecked=0, Total=756 [2023-11-12 02:09:05,663 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1492 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:05,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 463 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:09:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-12 02:09:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 311. [2023-11-12 02:09:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 300 states have (on average 1.4233333333333333) internal successors, (427), 310 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 427 transitions. [2023-11-12 02:09:05,676 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 427 transitions. Word has length 48 [2023-11-12 02:09:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:05,676 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 427 transitions. [2023-11-12 02:09:05,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 427 transitions. [2023-11-12 02:09:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:09:05,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:05,678 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:05,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:05,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:05,884 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:05,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1535058889, now seen corresponding path program 1 times [2023-11-12 02:09:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:05,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297290236] [2023-11-12 02:09:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:06,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297290236] [2023-11-12 02:09:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297290236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161372626] [2023-11-12 02:09:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:06,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:06,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:06,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:09:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:06,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:09:06,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:06,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:06,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161372626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:06,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:06,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2023-11-12 02:09:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217787571] [2023-11-12 02:09:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:09:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:09:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:09:06,563 INFO L87 Difference]: Start difference. First operand 311 states and 427 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:07,002 INFO L93 Difference]: Finished difference Result 346 states and 469 transitions. [2023-11-12 02:09:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:09:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-12 02:09:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:07,005 INFO L225 Difference]: With dead ends: 346 [2023-11-12 02:09:07,006 INFO L226 Difference]: Without dead ends: 346 [2023-11-12 02:09:07,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:09:07,007 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 285 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:07,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 474 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:09:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-12 02:09:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 311. [2023-11-12 02:09:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 300 states have (on average 1.42) internal successors, (426), 310 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 426 transitions. [2023-11-12 02:09:07,017 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 426 transitions. Word has length 48 [2023-11-12 02:09:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:07,017 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 426 transitions. [2023-11-12 02:09:07,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 426 transitions. [2023-11-12 02:09:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 02:09:07,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:07,019 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:07,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:07,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:07,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:07,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1075688002, now seen corresponding path program 1 times [2023-11-12 02:09:07,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:07,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908952644] [2023-11-12 02:09:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:07,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:07,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:07,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908952644] [2023-11-12 02:09:07,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908952644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:07,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:07,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:09:07,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101700481] [2023-11-12 02:09:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:07,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:07,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:07,339 INFO L87 Difference]: Start difference. First operand 311 states and 426 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:07,453 INFO L93 Difference]: Finished difference Result 328 states and 438 transitions. [2023-11-12 02:09:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:09:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-12 02:09:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:07,457 INFO L225 Difference]: With dead ends: 328 [2023-11-12 02:09:07,457 INFO L226 Difference]: Without dead ends: 328 [2023-11-12 02:09:07,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:09:07,458 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 106 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:07,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 175 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-12 02:09:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 323. [2023-11-12 02:09:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 312 states have (on average 1.3878205128205128) internal successors, (433), 322 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 433 transitions. [2023-11-12 02:09:07,468 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 433 transitions. Word has length 49 [2023-11-12 02:09:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:07,468 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 433 transitions. [2023-11-12 02:09:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 433 transitions. [2023-11-12 02:09:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:09:07,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:07,470 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:09:07,470 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:07,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2019400334, now seen corresponding path program 1 times [2023-11-12 02:09:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:07,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922334333] [2023-11-12 02:09:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:07,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:07,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922334333] [2023-11-12 02:09:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922334333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255044812] [2023-11-12 02:09:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:07,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:07,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:07,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:09:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:07,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:09:07,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:08,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255044812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:08,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2023-11-12 02:09:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701424923] [2023-11-12 02:09:08,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:09:08,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:09:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:09:08,279 INFO L87 Difference]: Start difference. First operand 323 states and 433 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:08,719 INFO L93 Difference]: Finished difference Result 348 states and 459 transitions. [2023-11-12 02:09:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:09:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-12 02:09:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:08,722 INFO L225 Difference]: With dead ends: 348 [2023-11-12 02:09:08,723 INFO L226 Difference]: Without dead ends: 348 [2023-11-12 02:09:08,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:09:08,724 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 273 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:08,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 474 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:09:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-12 02:09:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 316. [2023-11-12 02:09:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 305 states have (on average 1.3770491803278688) internal successors, (420), 315 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 420 transitions. [2023-11-12 02:09:08,735 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 420 transitions. Word has length 50 [2023-11-12 02:09:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:08,735 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 420 transitions. [2023-11-12 02:09:08,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 420 transitions. [2023-11-12 02:09:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 02:09:08,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:08,737 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:08,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:08,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:08,944 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:08,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash -288602046, now seen corresponding path program 1 times [2023-11-12 02:09:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:08,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133199874] [2023-11-12 02:09:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:08,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:09,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133199874] [2023-11-12 02:09:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133199874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068529507] [2023-11-12 02:09:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:09,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:09,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:09,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:09:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:09,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:09:09,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:09,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:09,721 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 9 treesize of output 7 [2023-11-12 02:09:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068529507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:09,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:09,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:09:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332248583] [2023-11-12 02:09:09,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:09:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:09,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:09:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:09:09,797 INFO L87 Difference]: Start difference. First operand 316 states and 420 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:10,924 INFO L93 Difference]: Finished difference Result 1172 states and 1645 transitions. [2023-11-12 02:09:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:09:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 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 55 [2023-11-12 02:09:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:10,934 INFO L225 Difference]: With dead ends: 1172 [2023-11-12 02:09:10,934 INFO L226 Difference]: Without dead ends: 1172 [2023-11-12 02:09:10,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 02:09:10,936 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 916 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:10,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1262 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:09:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2023-11-12 02:09:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 331. [2023-11-12 02:09:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 322 states have (on average 1.3540372670807452) internal successors, (436), 330 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 436 transitions. [2023-11-12 02:09:10,958 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 436 transitions. Word has length 55 [2023-11-12 02:09:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:10,958 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 436 transitions. [2023-11-12 02:09:10,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 436 transitions. [2023-11-12 02:09:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 02:09:10,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:10,960 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:10,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 02:09:11,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:09:11,166 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:11,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1294883028, now seen corresponding path program 1 times [2023-11-12 02:09:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722549685] [2023-11-12 02:09:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722549685] [2023-11-12 02:09:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722549685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:11,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:11,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:09:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969138472] [2023-11-12 02:09:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:11,322 INFO L87 Difference]: Start difference. First operand 331 states and 436 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:11,427 INFO L93 Difference]: Finished difference Result 400 states and 515 transitions. [2023-11-12 02:09:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:09:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-12 02:09:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:11,430 INFO L225 Difference]: With dead ends: 400 [2023-11-12 02:09:11,430 INFO L226 Difference]: Without dead ends: 400 [2023-11-12 02:09:11,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:09:11,431 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 102 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:11,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 272 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-12 02:09:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2023-11-12 02:09:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 320 states have (on average 1.340625) internal successors, (429), 328 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 429 transitions. [2023-11-12 02:09:11,442 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 429 transitions. Word has length 55 [2023-11-12 02:09:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:11,442 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 429 transitions. [2023-11-12 02:09:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 429 transitions. [2023-11-12 02:09:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-12 02:09:11,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:11,443 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:11,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:09:11,444 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1552311941, now seen corresponding path program 1 times [2023-11-12 02:09:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268777556] [2023-11-12 02:09:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:11,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268777556] [2023-11-12 02:09:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268777556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:11,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:11,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282756830] [2023-11-12 02:09:11,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:11,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:09:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:09:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:09:11,538 INFO L87 Difference]: Start difference. First operand 329 states and 429 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:11,606 INFO L93 Difference]: Finished difference Result 467 states and 608 transitions. [2023-11-12 02:09:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-12 02:09:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:11,610 INFO L225 Difference]: With dead ends: 467 [2023-11-12 02:09:11,610 INFO L226 Difference]: Without dead ends: 467 [2023-11-12 02:09:11,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:11,612 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:11,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 205 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-11-12 02:09:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 339. [2023-11-12 02:09:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 330 states have (on average 1.3212121212121213) internal successors, (436), 338 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 436 transitions. [2023-11-12 02:09:11,623 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 436 transitions. Word has length 58 [2023-11-12 02:09:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:11,623 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 436 transitions. [2023-11-12 02:09:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 436 transitions. [2023-11-12 02:09:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 02:09:11,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:11,625 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:09:11,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1559969453, now seen corresponding path program 2 times [2023-11-12 02:09:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78012878] [2023-11-12 02:09:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-12 02:09:12,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:12,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78012878] [2023-11-12 02:09:12,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78012878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:12,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874228218] [2023-11-12 02:09:12,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:12,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:12,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:09:12,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:09:12,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:12,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:09:12,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:12,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:12,632 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-12 02:09:12,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2023-11-12 02:09:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874228218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:12,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 11] total 25 [2023-11-12 02:09:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811982218] [2023-11-12 02:09:12,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:09:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:09:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:09:12,724 INFO L87 Difference]: Start difference. First operand 339 states and 436 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:18,522 INFO L93 Difference]: Finished difference Result 1502 states and 1944 transitions. [2023-11-12 02:09:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-12 02:09:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 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 59 [2023-11-12 02:09:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:18,537 INFO L225 Difference]: With dead ends: 1502 [2023-11-12 02:09:18,537 INFO L226 Difference]: Without dead ends: 1502 [2023-11-12 02:09:18,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1051, Invalid=8849, Unknown=0, NotChecked=0, Total=9900 [2023-11-12 02:09:18,544 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 2576 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 3706 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:18,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2576 Valid, 3706 Invalid, 3673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-12 02:09:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2023-11-12 02:09:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 472. [2023-11-12 02:09:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 463 states have (on average 1.3131749460043196) internal successors, (608), 471 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 608 transitions. [2023-11-12 02:09:18,575 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 608 transitions. Word has length 59 [2023-11-12 02:09:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:18,575 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 608 transitions. [2023-11-12 02:09:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 608 transitions. [2023-11-12 02:09:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 02:09:18,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:18,580 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:18,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:18,787 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:18,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2058316280, now seen corresponding path program 1 times [2023-11-12 02:09:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335915546] [2023-11-12 02:09:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 02:09:18,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335915546] [2023-11-12 02:09:18,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335915546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:18,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:18,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:09:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601987164] [2023-11-12 02:09:18,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:18,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:09:18,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:18,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:09:18,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:09:18,843 INFO L87 Difference]: Start difference. First operand 472 states and 608 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:18,860 INFO L93 Difference]: Finished difference Result 488 states and 624 transitions. [2023-11-12 02:09:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:09:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 60 [2023-11-12 02:09:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:18,864 INFO L225 Difference]: With dead ends: 488 [2023-11-12 02:09:18,865 INFO L226 Difference]: Without dead ends: 488 [2023-11-12 02:09:18,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:09:18,866 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:18,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-12 02:09:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 487. [2023-11-12 02:09:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 478 states have (on average 1.3033472803347281) internal successors, (623), 486 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 623 transitions. [2023-11-12 02:09:18,882 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 623 transitions. Word has length 60 [2023-11-12 02:09:18,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:18,883 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 623 transitions. [2023-11-12 02:09:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 623 transitions. [2023-11-12 02:09:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-12 02:09:18,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:18,885 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-12 02:09:18,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:18,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1018128091, now seen corresponding path program 1 times [2023-11-12 02:09:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180977760] [2023-11-12 02:09:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:19,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:19,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180977760] [2023-11-12 02:09:19,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180977760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:19,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:19,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:19,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051867879] [2023-11-12 02:09:19,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:19,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:19,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:19,227 INFO L87 Difference]: Start difference. First operand 487 states and 623 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:19,299 INFO L93 Difference]: Finished difference Result 486 states and 622 transitions. [2023-11-12 02:09:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:19,300 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), 0 states have call successors, (0), 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 61 [2023-11-12 02:09:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:19,303 INFO L225 Difference]: With dead ends: 486 [2023-11-12 02:09:19,304 INFO L226 Difference]: Without dead ends: 483 [2023-11-12 02:09:19,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:19,305 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:19,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 158 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-12 02:09:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2023-11-12 02:09:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 475 states have (on average 1.2673684210526315) internal successors, (602), 482 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 602 transitions. [2023-11-12 02:09:19,320 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 602 transitions. Word has length 61 [2023-11-12 02:09:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 602 transitions. [2023-11-12 02:09:19,321 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 602 transitions. [2023-11-12 02:09:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 02:09:19,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:19,322 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2023-11-12 02:09:19,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-12 02:09:19,323 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:19,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash 44185747, now seen corresponding path program 1 times [2023-11-12 02:09:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:19,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213749710] [2023-11-12 02:09:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:19,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213749710] [2023-11-12 02:09:19,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213749710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:19,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604879053] [2023-11-12 02:09:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:19,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:19,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:19,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:09:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:19,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:09:19,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:19,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:19,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604879053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:19,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:19,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-11-12 02:09:19,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803797952] [2023-11-12 02:09:19,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:19,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:09:19,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:09:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:19,814 INFO L87 Difference]: Start difference. First operand 483 states and 602 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:19,950 INFO L93 Difference]: Finished difference Result 509 states and 616 transitions. [2023-11-12 02:09:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-12 02:09:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:19,957 INFO L225 Difference]: With dead ends: 509 [2023-11-12 02:09:19,957 INFO L226 Difference]: Without dead ends: 509 [2023-11-12 02:09:19,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:09:19,958 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 158 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:19,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 286 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-12 02:09:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 459. [2023-11-12 02:09:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 451 states have (on average 1.246119733924612) internal successors, (562), 458 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 562 transitions. [2023-11-12 02:09:19,973 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 562 transitions. Word has length 62 [2023-11-12 02:09:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:19,974 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 562 transitions. [2023-11-12 02:09:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 562 transitions. [2023-11-12 02:09:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:09:19,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:19,976 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:19,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-12 02:09:20,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -937242689, now seen corresponding path program 1 times [2023-11-12 02:09:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259184464] [2023-11-12 02:09:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259184464] [2023-11-12 02:09:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259184464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:20,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:20,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:09:20,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257797138] [2023-11-12 02:09:20,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:09:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:09:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:09:20,293 INFO L87 Difference]: Start difference. First operand 459 states and 562 transitions. Second operand has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:20,322 INFO L93 Difference]: Finished difference Result 458 states and 556 transitions. [2023-11-12 02:09:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:09:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 64 [2023-11-12 02:09:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:20,326 INFO L225 Difference]: With dead ends: 458 [2023-11-12 02:09:20,327 INFO L226 Difference]: Without dead ends: 458 [2023-11-12 02:09:20,327 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 [2023-11-12 02:09:20,328 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:20,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-11-12 02:09:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2023-11-12 02:09:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 451 states have (on average 1.2328159645232817) internal successors, (556), 457 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 556 transitions. [2023-11-12 02:09:20,344 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 556 transitions. Word has length 64 [2023-11-12 02:09:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:20,344 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 556 transitions. [2023-11-12 02:09:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 556 transitions. [2023-11-12 02:09:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:09:20,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:20,346 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-12 02:09:20,347 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:20,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:20,348 INFO L85 PathProgramCache]: Analyzing trace with hash -937242688, now seen corresponding path program 1 times [2023-11-12 02:09:20,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:20,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540365059] [2023-11-12 02:09:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540365059] [2023-11-12 02:09:20,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540365059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:20,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:20,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:09:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976378683] [2023-11-12 02:09:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:20,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:20,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:20,497 INFO L87 Difference]: Start difference. First operand 458 states and 556 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:20,604 INFO L93 Difference]: Finished difference Result 471 states and 566 transitions. [2023-11-12 02:09:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 64 [2023-11-12 02:09:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:20,610 INFO L225 Difference]: With dead ends: 471 [2023-11-12 02:09:20,610 INFO L226 Difference]: Without dead ends: 463 [2023-11-12 02:09:20,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:20,611 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:20,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 203 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-12 02:09:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 458. [2023-11-12 02:09:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 451 states have (on average 1.23059866962306) internal successors, (555), 457 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 555 transitions. [2023-11-12 02:09:20,626 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 555 transitions. Word has length 64 [2023-11-12 02:09:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:20,626 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 555 transitions. [2023-11-12 02:09:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 555 transitions. [2023-11-12 02:09:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:09:20,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:20,628 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:20,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-12 02:09:20,629 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:20,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1948359938, now seen corresponding path program 1 times [2023-11-12 02:09:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:20,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208241347] [2023-11-12 02:09:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:20,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:20,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208241347] [2023-11-12 02:09:20,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208241347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:20,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:20,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797450149] [2023-11-12 02:09:20,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:09:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:09:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:09:20,766 INFO L87 Difference]: Start difference. First operand 458 states and 555 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:20,866 INFO L93 Difference]: Finished difference Result 430 states and 521 transitions. [2023-11-12 02:09:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:09:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 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 64 [2023-11-12 02:09:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:20,869 INFO L225 Difference]: With dead ends: 430 [2023-11-12 02:09:20,870 INFO L226 Difference]: Without dead ends: 414 [2023-11-12 02:09:20,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:20,871 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 47 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:20,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 160 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-12 02:09:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 401. [2023-11-12 02:09:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 394 states have (on average 1.2411167512690355) internal successors, (489), 400 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 489 transitions. [2023-11-12 02:09:20,892 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 489 transitions. Word has length 64 [2023-11-12 02:09:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:20,892 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 489 transitions. [2023-11-12 02:09:20,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 489 transitions. [2023-11-12 02:09:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 02:09:20,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:20,894 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-12 02:09:20,895 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:20,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:20,895 INFO L85 PathProgramCache]: Analyzing trace with hash 168025001, now seen corresponding path program 1 times [2023-11-12 02:09:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711500201] [2023-11-12 02:09:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-12 02:09:21,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711500201] [2023-11-12 02:09:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711500201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984481507] [2023-11-12 02:09:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:21,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:21,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:09:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:21,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:09:21,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-12 02:09:21,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:22,140 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-12 02:09:22,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2023-11-12 02:09:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-12 02:09:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984481507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:22,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:22,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 26 [2023-11-12 02:09:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7241555] [2023-11-12 02:09:22,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:22,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:09:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:09:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:09:22,261 INFO L87 Difference]: Start difference. First operand 401 states and 489 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:27,091 INFO L93 Difference]: Finished difference Result 1339 states and 1641 transitions. [2023-11-12 02:09:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-12 02:09:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-12 02:09:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:27,100 INFO L225 Difference]: With dead ends: 1339 [2023-11-12 02:09:27,100 INFO L226 Difference]: Without dead ends: 1339 [2023-11-12 02:09:27,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=799, Invalid=6341, Unknown=0, NotChecked=0, Total=7140 [2023-11-12 02:09:27,105 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 2158 mSDsluCounter, 4049 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 4330 SdHoareTripleChecker+Invalid, 3442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:27,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2158 Valid, 4330 Invalid, 3442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 02:09:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2023-11-12 02:09:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 435. [2023-11-12 02:09:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 428 states have (on average 1.2476635514018692) internal successors, (534), 434 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 534 transitions. [2023-11-12 02:09:27,135 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 534 transitions. Word has length 65 [2023-11-12 02:09:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:27,135 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 534 transitions. [2023-11-12 02:09:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 534 transitions. [2023-11-12 02:09:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:09:27,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:27,137 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:27,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:27,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:09:27,344 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:27,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1630169780, now seen corresponding path program 2 times [2023-11-12 02:09:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17018889] [2023-11-12 02:09:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-12 02:09:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17018889] [2023-11-12 02:09:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17018889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187910391] [2023-11-12 02:09:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:27,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:27,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:09:27,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:09:27,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:27,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:09:27,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-12 02:09:28,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:28,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187910391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:28,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:28,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-12 02:09:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821273219] [2023-11-12 02:09:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:28,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:09:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:09:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:09:28,048 INFO L87 Difference]: Start difference. First operand 435 states and 534 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:28,581 INFO L93 Difference]: Finished difference Result 729 states and 882 transitions. [2023-11-12 02:09:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:09:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-12 02:09:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:28,587 INFO L225 Difference]: With dead ends: 729 [2023-11-12 02:09:28,588 INFO L226 Difference]: Without dead ends: 720 [2023-11-12 02:09:28,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:09:28,589 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 185 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:28,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 357 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:09:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-11-12 02:09:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 483. [2023-11-12 02:09:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 479 states have (on average 1.221294363256785) internal successors, (585), 482 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 585 transitions. [2023-11-12 02:09:28,608 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 585 transitions. Word has length 69 [2023-11-12 02:09:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:28,609 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 585 transitions. [2023-11-12 02:09:28,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 585 transitions. [2023-11-12 02:09:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:09:28,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:28,612 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2023-11-12 02:09:28,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:09:28,819 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:28,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 619831865, now seen corresponding path program 1 times [2023-11-12 02:09:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824889017] [2023-11-12 02:09:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 02:09:28,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824889017] [2023-11-12 02:09:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824889017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:28,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:28,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:09:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931574318] [2023-11-12 02:09:28,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:28,974 INFO L87 Difference]: Start difference. First operand 483 states and 585 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:29,156 INFO L93 Difference]: Finished difference Result 658 states and 792 transitions. [2023-11-12 02:09:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-12 02:09:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:29,160 INFO L225 Difference]: With dead ends: 658 [2023-11-12 02:09:29,161 INFO L226 Difference]: Without dead ends: 626 [2023-11-12 02:09:29,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:09:29,162 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 126 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:29,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 275 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-12 02:09:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 542. [2023-11-12 02:09:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 538 states have (on average 1.228624535315985) internal successors, (661), 541 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 661 transitions. [2023-11-12 02:09:29,177 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 661 transitions. Word has length 71 [2023-11-12 02:09:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:29,177 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 661 transitions. [2023-11-12 02:09:29,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 661 transitions. [2023-11-12 02:09:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 02:09:29,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:29,179 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2023-11-12 02:09:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-12 02:09:29,180 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:29,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -391285385, now seen corresponding path program 1 times [2023-11-12 02:09:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222839480] [2023-11-12 02:09:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:29,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222839480] [2023-11-12 02:09:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222839480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:29,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797685031] [2023-11-12 02:09:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:29,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:29,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:29,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:09:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:29,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:09:29,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:29,673 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 [2023-11-12 02:09:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:30,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:30,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797685031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:30,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:30,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-11-12 02:09:30,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101948117] [2023-11-12 02:09:30,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:30,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:09:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:30,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:09:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:09:30,138 INFO L87 Difference]: Start difference. First operand 542 states and 661 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:30,356 INFO L93 Difference]: Finished difference Result 640 states and 768 transitions. [2023-11-12 02:09:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-12 02:09:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:30,361 INFO L225 Difference]: With dead ends: 640 [2023-11-12 02:09:30,361 INFO L226 Difference]: Without dead ends: 640 [2023-11-12 02:09:30,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:09:30,363 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:30,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 205 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:30,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2023-11-12 02:09:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 572. [2023-11-12 02:09:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.2200704225352113) internal successors, (693), 571 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 693 transitions. [2023-11-12 02:09:30,383 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 693 transitions. Word has length 71 [2023-11-12 02:09:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:30,383 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 693 transitions. [2023-11-12 02:09:30,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 693 transitions. [2023-11-12 02:09:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:09:30,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:30,385 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2023-11-12 02:09:30,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-12 02:09:30,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:09:30,591 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:30,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 754653992, now seen corresponding path program 1 times [2023-11-12 02:09:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145364783] [2023-11-12 02:09:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 02:09:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145364783] [2023-11-12 02:09:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145364783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:30,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:30,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:09:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606200625] [2023-11-12 02:09:30,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:09:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:09:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:09:30,765 INFO L87 Difference]: Start difference. First operand 572 states and 693 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:30,877 INFO L93 Difference]: Finished difference Result 579 states and 691 transitions. [2023-11-12 02:09:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-12 02:09:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:30,879 INFO L225 Difference]: With dead ends: 579 [2023-11-12 02:09:30,879 INFO L226 Difference]: Without dead ends: 579 [2023-11-12 02:09:30,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:09:30,880 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 116 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:30,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 188 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-11-12 02:09:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2023-11-12 02:09:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.2070796460176991) internal successors, (682), 567 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 682 transitions. [2023-11-12 02:09:30,896 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 682 transitions. Word has length 72 [2023-11-12 02:09:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:30,896 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 682 transitions. [2023-11-12 02:09:30,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 682 transitions. [2023-11-12 02:09:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 02:09:30,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:30,898 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:30,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-12 02:09:30,898 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:30,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:30,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1749430052, now seen corresponding path program 3 times [2023-11-12 02:09:30,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:30,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364889904] [2023-11-12 02:09:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364889904] [2023-11-12 02:09:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364889904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:31,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494797394] [2023-11-12 02:09:31,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:09:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:31,277 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:09:31,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:09:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:31,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:09:31,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:31,446 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 [2023-11-12 02:09:31,451 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 [2023-11-12 02:09:31,682 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 [2023-11-12 02:09:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:09:31,713 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 14 treesize of output 9 [2023-11-12 02:09:31,722 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:09:31,722 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 [2023-11-12 02:09:31,872 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:31,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-12 02:09:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 02:09:32,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:32,427 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 20 treesize of output 18 [2023-11-12 02:09:32,438 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 24 treesize of output 15 [2023-11-12 02:09:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-12 02:09:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494797394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:32,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-12 02:09:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937427575] [2023-11-12 02:09:32,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:09:32,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:09:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:09:32,919 INFO L87 Difference]: Start difference. First operand 568 states and 682 transitions. Second operand has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:34,008 INFO L93 Difference]: Finished difference Result 1354 states and 1649 transitions. [2023-11-12 02:09:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:09:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 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 74 [2023-11-12 02:09:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:34,017 INFO L225 Difference]: With dead ends: 1354 [2023-11-12 02:09:34,017 INFO L226 Difference]: Without dead ends: 1354 [2023-11-12 02:09:34,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 02:09:34,019 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1951 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1951 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:34,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1951 Valid, 874 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:09:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2023-11-12 02:09:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 628. [2023-11-12 02:09:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 625 states have (on average 1.216) internal successors, (760), 627 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 760 transitions. [2023-11-12 02:09:34,044 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 760 transitions. Word has length 74 [2023-11-12 02:09:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:34,045 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 760 transitions. [2023-11-12 02:09:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.181818181818182) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 760 transitions. [2023-11-12 02:09:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 02:09:34,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:34,047 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:34,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:34,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:34,254 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:34,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1990946019, now seen corresponding path program 2 times [2023-11-12 02:09:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:34,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450469725] [2023-11-12 02:09:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:34,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 02:09:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450469725] [2023-11-12 02:09:34,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450469725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216436012] [2023-11-12 02:09:34,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:34,701 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:09:34,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:09:34,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:34,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 02:09:34,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:34,871 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 [2023-11-12 02:09:35,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:09:35,044 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 14 treesize of output 9 [2023-11-12 02:09:35,055 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:09:35,055 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 [2023-11-12 02:09:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:35,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:35,870 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 29 treesize of output 25 [2023-11-12 02:09:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216436012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:36,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:36,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 28 [2023-11-12 02:09:36,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271201845] [2023-11-12 02:09:36,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:36,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 02:09:36,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 02:09:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2023-11-12 02:09:36,044 INFO L87 Difference]: Start difference. First operand 628 states and 760 transitions. Second operand has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:36,832 INFO L93 Difference]: Finished difference Result 1353 states and 1643 transitions. [2023-11-12 02:09:36,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:09:36,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 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 76 [2023-11-12 02:09:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:36,838 INFO L225 Difference]: With dead ends: 1353 [2023-11-12 02:09:36,839 INFO L226 Difference]: Without dead ends: 1353 [2023-11-12 02:09:36,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 02:09:36,840 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1842 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1842 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:36,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1842 Valid, 1514 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:09:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2023-11-12 02:09:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1341. [2023-11-12 02:09:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1338 states have (on average 1.2279521674140508) internal successors, (1643), 1340 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1643 transitions. [2023-11-12 02:09:36,873 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1643 transitions. Word has length 76 [2023-11-12 02:09:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:36,873 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 1643 transitions. [2023-11-12 02:09:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1643 transitions. [2023-11-12 02:09:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 02:09:36,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:36,874 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 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] [2023-11-12 02:09:36,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:37,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-12 02:09:37,076 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:37,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1383026470, now seen corresponding path program 1 times [2023-11-12 02:09:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:37,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459604791] [2023-11-12 02:09:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:37,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-12 02:09:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459604791] [2023-11-12 02:09:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459604791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:09:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641201682] [2023-11-12 02:09:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:37,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:37,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:37,176 INFO L87 Difference]: Start difference. First operand 1341 states and 1643 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:37,195 INFO L93 Difference]: Finished difference Result 1385 states and 1687 transitions. [2023-11-12 02:09:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:09:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-11-12 02:09:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:37,202 INFO L225 Difference]: With dead ends: 1385 [2023-11-12 02:09:37,202 INFO L226 Difference]: Without dead ends: 1385 [2023-11-12 02:09:37,202 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 [2023-11-12 02:09:37,203 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:37,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 157 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2023-11-12 02:09:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1385. [2023-11-12 02:09:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1382 states have (on average 1.2206946454413894) internal successors, (1687), 1384 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1687 transitions. [2023-11-12 02:09:37,231 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1687 transitions. Word has length 82 [2023-11-12 02:09:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:37,232 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 1687 transitions. [2023-11-12 02:09:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1687 transitions. [2023-11-12 02:09:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-12 02:09:37,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:37,234 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 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] [2023-11-12 02:09:37,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-12 02:09:37,234 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:37,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1994561461, now seen corresponding path program 1 times [2023-11-12 02:09:37,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:37,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708223499] [2023-11-12 02:09:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:37,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-12 02:09:37,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:37,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708223499] [2023-11-12 02:09:37,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708223499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:37,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:37,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:09:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223829699] [2023-11-12 02:09:37,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:09:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:09:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:09:37,336 INFO L87 Difference]: Start difference. First operand 1385 states and 1687 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:37,384 INFO L93 Difference]: Finished difference Result 1771 states and 2146 transitions. [2023-11-12 02:09:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:09:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-12 02:09:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:37,392 INFO L225 Difference]: With dead ends: 1771 [2023-11-12 02:09:37,393 INFO L226 Difference]: Without dead ends: 1771 [2023-11-12 02:09:37,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:37,393 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 73 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:37,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 186 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-11-12 02:09:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1385. [2023-11-12 02:09:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1382 states have (on average 1.2149059334298118) internal successors, (1679), 1384 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1679 transitions. [2023-11-12 02:09:37,431 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1679 transitions. Word has length 84 [2023-11-12 02:09:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:37,432 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 1679 transitions. [2023-11-12 02:09:37,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1679 transitions. [2023-11-12 02:09:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 02:09:37,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:37,434 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 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] [2023-11-12 02:09:37,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-12 02:09:37,434 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:37,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash -24694026, now seen corresponding path program 1 times [2023-11-12 02:09:37,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:37,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422119967] [2023-11-12 02:09:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:37,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:37,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422119967] [2023-11-12 02:09:37,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422119967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:37,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964640651] [2023-11-12 02:09:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:37,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:37,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:37,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:09:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:37,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:09:37,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:37,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:38,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964640651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:38,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:38,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-12 02:09:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561348578] [2023-11-12 02:09:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:38,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:09:38,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:09:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:09:38,136 INFO L87 Difference]: Start difference. First operand 1385 states and 1679 transitions. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:38,911 INFO L93 Difference]: Finished difference Result 2385 states and 2856 transitions. [2023-11-12 02:09:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:09:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 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 86 [2023-11-12 02:09:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:38,919 INFO L225 Difference]: With dead ends: 2385 [2023-11-12 02:09:38,919 INFO L226 Difference]: Without dead ends: 1752 [2023-11-12 02:09:38,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 02:09:38,921 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 692 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:38,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 913 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:09:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2023-11-12 02:09:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1409. [2023-11-12 02:09:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1406 states have (on average 1.1998577524893315) internal successors, (1687), 1408 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1687 transitions. [2023-11-12 02:09:38,955 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1687 transitions. Word has length 86 [2023-11-12 02:09:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 1409 states and 1687 transitions. [2023-11-12 02:09:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:09:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1687 transitions. [2023-11-12 02:09:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-12 02:09:38,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:38,957 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 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] [2023-11-12 02:09:38,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-12 02:09:39,164 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-11-12 02:09:39,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1750313336, now seen corresponding path program 1 times [2023-11-12 02:09:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:39,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822326562] [2023-11-12 02:09:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-12 02:09:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822326562] [2023-11-12 02:09:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822326562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:39,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465119354] [2023-11-12 02:09:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:39,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58267746-0db8-48e0-a6c5-b97b293674ee/bin/uautomizer-verify-uTZkv6EMXl/z3