./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-before.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme --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 64bit --witnessprinter.graph.data.programhash 332869ec37f6f5fc1ff0b6d6275b635675d9112e392919be0a978cd693d61f8f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:38,298 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:38,416 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 10:42:38,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:38,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:38,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:38,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:38,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:38,473 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:38,478 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:38,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:38,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:38,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:38,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:38,482 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:38,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:38,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:38,484 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:38,484 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:42:38,485 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:42:38,485 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:42:38,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:38,487 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:42:38,487 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:42:38,488 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:38,489 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:38,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:38,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:38,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:38,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:38,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:38,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:38,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:38,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:38,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:38,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:38,494 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:38,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:38,494 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_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332869ec37f6f5fc1ff0b6d6275b635675d9112e392919be0a978cd693d61f8f [2023-11-26 10:42:38,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:38,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:38,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:38,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:38,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:38,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-broom/sll-shared-before.i [2023-11-26 10:42:41,789 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:42,130 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:42,131 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/sv-benchmarks/c/memsafety-broom/sll-shared-before.i [2023-11-26 10:42:42,175 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/data/fed8ea327/c6681192a5354073813593c66fad2582/FLAG67b97c8b3 [2023-11-26 10:42:42,192 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/data/fed8ea327/c6681192a5354073813593c66fad2582 [2023-11-26 10:42:42,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:42,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:42,198 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:42,198 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:42,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:42,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c84a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42, skipping insertion in model container [2023-11-26 10:42:42,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:42,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,688 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:42,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:42,781 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:42,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42 WrapperNode [2023-11-26 10:42:42,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:42,783 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:42,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:42,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:42,792 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,859 INFO L138 Inliner]: procedures = 120, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-11-26 10:42:42,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:42,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:42,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:42,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:42,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,905 INFO L175 MemorySlicer]: Split 8 memory accesses to 1 slices as follows [8]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 5 writes are split as follows [5]. [2023-11-26 10:42:42,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,920 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:42,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:42,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:42,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:42,925 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (1/1) ... [2023-11-26 10:42:42,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:42,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:42,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:43,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:42:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-26 10:42:43,012 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-26 10:42:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 10:42:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 10:42:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 10:42:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:42:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:43,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:43,129 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:43,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:43,400 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:43,484 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:43,485 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:42:43,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:43 BoogieIcfgContainer [2023-11-26 10:42:43,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:43,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:43,489 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:43,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:43,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:42" (1/3) ... [2023-11-26 10:42:43,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52be4196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:43, skipping insertion in model container [2023-11-26 10:42:43,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:42" (2/3) ... [2023-11-26 10:42:43,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52be4196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:43, skipping insertion in model container [2023-11-26 10:42:43,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:43" (3/3) ... [2023-11-26 10:42:43,518 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-shared-before.i [2023-11-26 10:42:43,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:43,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-11-26 10:42:43,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:43,604 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;@6ac6f1dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:43,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-26 10:42:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-26 10:42:43,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:43,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-26 10:42:43,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:43,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash 3792, now seen corresponding path program 1 times [2023-11-26 10:42:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474506509] [2023-11-26 10:42:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474506509] [2023-11-26 10:42:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474506509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:43,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:43,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095338571] [2023-11-26 10:42:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:43,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:43,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:43,974 INFO L87 Difference]: Start difference. First operand has 50 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 46 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:44,095 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2023-11-26 10:42:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-26 10:42:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:44,106 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:42:44,106 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 10:42:44,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:44,113 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 63 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 [2023-11-26 10:42:44,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 63 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 10:42:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-26 10:42:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 2.0) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-11-26 10:42:44,161 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 2 [2023-11-26 10:42:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:44,162 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-11-26 10:42:44,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-11-26 10:42:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-26 10:42:44,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:44,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-26 10:42:44,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:42:44,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:44,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash 3793, now seen corresponding path program 1 times [2023-11-26 10:42:44,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:44,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130581461] [2023-11-26 10:42:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130581461] [2023-11-26 10:42:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130581461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:44,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:42:44,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893492074] [2023-11-26 10:42:44,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:44,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:44,287 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:44,361 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-11-26 10:42:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-26 10:42:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:44,363 INFO L225 Difference]: With dead ends: 47 [2023-11-26 10:42:44,364 INFO L226 Difference]: Without dead ends: 47 [2023-11-26 10:42:44,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:44,370 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:44,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-26 10:42:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-26 10:42:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-26 10:42:44,389 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 2 [2023-11-26 10:42:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-26 10:42:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-26 10:42:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:42:44,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:44,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:42:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:42:44,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:44,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 115549681, now seen corresponding path program 1 times [2023-11-26 10:42:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:44,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442542162] [2023-11-26 10:42:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:44,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442542162] [2023-11-26 10:42:44,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442542162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043952587] [2023-11-26 10:42:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:44,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:44,540 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:44,593 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-11-26 10:42:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:44,594 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 10:42:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:44,595 INFO L225 Difference]: With dead ends: 46 [2023-11-26 10:42:44,595 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:42:44,596 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 [2023-11-26 10:42:44,597 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:44,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 62 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:42:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-26 10:42:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-26 10:42:44,606 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 5 [2023-11-26 10:42:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:44,606 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-26 10:42:44,607 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-26 10:42:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:42:44,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:44,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:42:44,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:42:44,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:44,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash 115549682, now seen corresponding path program 1 times [2023-11-26 10:42:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:44,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123628202] [2023-11-26 10:42:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:44,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123628202] [2023-11-26 10:42:44,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123628202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:44,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:44,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:44,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612685490] [2023-11-26 10:42:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:44,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:44,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:44,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:44,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:44,786 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:44,845 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-11-26 10:42:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:44,845 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 10:42:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:44,847 INFO L225 Difference]: With dead ends: 45 [2023-11-26 10:42:44,848 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 10:42:44,848 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 [2023-11-26 10:42:44,849 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:44,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 10:42:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-26 10:42:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-11-26 10:42:44,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 5 [2023-11-26 10:42:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:44,861 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-11-26 10:42:44,862 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-11-26 10:42:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:42:44,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:44,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:44,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:42:44,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:44,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2074385775, now seen corresponding path program 1 times [2023-11-26 10:42:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:44,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684789348] [2023-11-26 10:42:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:44,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684789348] [2023-11-26 10:42:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684789348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:45,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:45,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537798585] [2023-11-26 10:42:45,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:45,025 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:45,134 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-11-26 10:42:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-26 10:42:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:45,137 INFO L225 Difference]: With dead ends: 46 [2023-11-26 10:42:45,137 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:42:45,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:45,138 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:45,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 94 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:42:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2023-11-26 10:42:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-11-26 10:42:45,146 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 8 [2023-11-26 10:42:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:45,147 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-11-26 10:42:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-11-26 10:42:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 10:42:45,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:45,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:45,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:42:45,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:45,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2074385776, now seen corresponding path program 1 times [2023-11-26 10:42:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119658098] [2023-11-26 10:42:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119658098] [2023-11-26 10:42:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119658098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:45,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:45,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:42:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813312200] [2023-11-26 10:42:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:42:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:42:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:42:45,368 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:45,491 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-11-26 10:42:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:42:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-11-26 10:42:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:45,493 INFO L225 Difference]: With dead ends: 45 [2023-11-26 10:42:45,493 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 10:42:45,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:42:45,494 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:45,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 137 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 10:42:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-11-26 10:42:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 37 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-11-26 10:42:45,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 8 [2023-11-26 10:42:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:45,500 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-11-26 10:42:45,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-11-26 10:42:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 10:42:45,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:45,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:45,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:42:45,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:45,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1272537238, now seen corresponding path program 1 times [2023-11-26 10:42:45,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539045635] [2023-11-26 10:42:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:45,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:45,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539045635] [2023-11-26 10:42:45,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539045635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:45,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:45,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:45,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635569629] [2023-11-26 10:42:45,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:45,565 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:45,615 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-26 10:42:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-26 10:42:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:45,616 INFO L225 Difference]: With dead ends: 40 [2023-11-26 10:42:45,616 INFO L226 Difference]: Without dead ends: 40 [2023-11-26 10:42:45,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:45,618 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:45,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:42:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-26 10:42:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-26 10:42:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-26 10:42:45,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 12 [2023-11-26 10:42:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:45,623 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-26 10:42:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-26 10:42:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:42:45,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:45,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:45,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:42:45,625 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:45,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -793948631, now seen corresponding path program 1 times [2023-11-26 10:42:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927763044] [2023-11-26 10:42:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927763044] [2023-11-26 10:42:45,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927763044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:45,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:45,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:42:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727611385] [2023-11-26 10:42:45,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:42:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:45,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:42:45,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:45,689 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:45,750 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-11-26 10:42:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:42:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 10:42:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:45,751 INFO L225 Difference]: With dead ends: 39 [2023-11-26 10:42:45,752 INFO L226 Difference]: Without dead ends: 39 [2023-11-26 10:42:45,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:42:45,753 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:45,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-26 10:42:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-26 10:42:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.608695652173913) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-11-26 10:42:45,758 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 13 [2023-11-26 10:42:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:45,758 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-11-26 10:42:45,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-11-26 10:42:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 10:42:45,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:45,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:42:45,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:45,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1157396300, now seen corresponding path program 1 times [2023-11-26 10:42:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388709175] [2023-11-26 10:42:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388709175] [2023-11-26 10:42:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388709175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:46,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:46,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381899220] [2023-11-26 10:42:46,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:46,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:46,021 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:46,110 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-11-26 10:42:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:42:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-26 10:42:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:46,119 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:42:46,119 INFO L226 Difference]: Without dead ends: 38 [2023-11-26 10:42:46,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:46,122 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60 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 [2023-11-26 10:42:46,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 60 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-26 10:42:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-26 10:42:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.565217391304348) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-26 10:42:46,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 14 [2023-11-26 10:42:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:46,133 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-26 10:42:46,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-26 10:42:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:42:46,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:46,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:42:46,134 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:46,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1571626466, now seen corresponding path program 1 times [2023-11-26 10:42:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:46,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181319165] [2023-11-26 10:42:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:46,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181319165] [2023-11-26 10:42:46,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181319165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:46,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832516173] [2023-11-26 10:42:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:46,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:46,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:42:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:46,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:42:46,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:46,691 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 10:42:46,753 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 10:42:46,753 INFO L378 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 [2023-11-26 10:42:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:46,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:42:46,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832516173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:46,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:42:46,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-26 10:42:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644941425] [2023-11-26 10:42:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:46,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:46,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:46,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:46,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2023-11-26 10:42:46,765 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:46,829 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-11-26 10:42:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:42:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-26 10:42:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:46,831 INFO L225 Difference]: With dead ends: 44 [2023-11-26 10:42:46,831 INFO L226 Difference]: Without dead ends: 44 [2023-11-26 10:42:46,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2023-11-26 10:42:46,832 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:46,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2023-11-26 10:42:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-26 10:42:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-26 10:42:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 37 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-26 10:42:46,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 15 [2023-11-26 10:42:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:46,843 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-26 10:42:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-26 10:42:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:42:46,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:46,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:46,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:47,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:47,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1571626467, now seen corresponding path program 1 times [2023-11-26 10:42:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:47,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154293703] [2023-11-26 10:42:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:47,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154293703] [2023-11-26 10:42:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154293703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:47,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290365371] [2023-11-26 10:42:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:47,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:47,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:47,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:42:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:47,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 10:42:47,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:47,820 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:42:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:42:47,842 INFO L378 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 16 treesize of output 11 [2023-11-26 10:42:47,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:42:47,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:42:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-26 10:42:47,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:48,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290365371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:48,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:48,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-26 10:42:48,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129924391] [2023-11-26 10:42:48,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:48,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:42:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:42:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=252, Unknown=1, NotChecked=32, Total=342 [2023-11-26 10:42:48,012 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:42:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:48,280 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-26 10:42:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:42:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2023-11-26 10:42:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:48,281 INFO L225 Difference]: With dead ends: 48 [2023-11-26 10:42:48,282 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 10:42:48,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=313, Unknown=1, NotChecked=36, Total=420 [2023-11-26 10:42:48,283 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:48,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2023-11-26 10:42:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 10:42:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2023-11-26 10:42:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-26 10:42:48,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 15 [2023-11-26 10:42:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:48,287 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-26 10:42:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:42:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-26 10:42:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:42:48,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:48,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:48,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:42:48,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:48,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash -138682353, now seen corresponding path program 1 times [2023-11-26 10:42:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:48,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030359428] [2023-11-26 10:42:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030359428] [2023-11-26 10:42:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030359428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:42:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811727717] [2023-11-26 10:42:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:48,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:42:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:42:48,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:42:48,794 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:48,992 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-26 10:42:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:42:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-26 10:42:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:48,994 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:42:48,994 INFO L226 Difference]: Without dead ends: 59 [2023-11-26 10:42:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:42:48,995 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 105 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:42:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-26 10:42:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2023-11-26 10:42:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-26 10:42:49,013 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2023-11-26 10:42:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:49,013 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-26 10:42:49,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-26 10:42:49,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 10:42:49,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:49,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:42:49,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:49,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -138682352, now seen corresponding path program 1 times [2023-11-26 10:42:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829527619] [2023-11-26 10:42:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:49,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829527619] [2023-11-26 10:42:49,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829527619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:49,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:49,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:42:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392971063] [2023-11-26 10:42:49,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:49,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:42:49,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:42:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:42:49,322 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:49,509 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2023-11-26 10:42:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:42:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-26 10:42:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:49,510 INFO L225 Difference]: With dead ends: 67 [2023-11-26 10:42:49,510 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 10:42:49,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:42:49,512 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:49,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 102 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 10:42:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2023-11-26 10:42:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-26 10:42:49,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 16 [2023-11-26 10:42:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:49,519 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-26 10:42:49,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-26 10:42:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:42:49,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:49,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:49,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:42:49,521 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:49,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1495392763, now seen corresponding path program 1 times [2023-11-26 10:42:49,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969642008] [2023-11-26 10:42:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:42:49,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969642008] [2023-11-26 10:42:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969642008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:49,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:49,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:42:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532520318] [2023-11-26 10:42:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:42:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:42:49,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:42:49,698 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:49,801 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-11-26 10:42:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:42:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:42:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:49,803 INFO L225 Difference]: With dead ends: 50 [2023-11-26 10:42:49,804 INFO L226 Difference]: Without dead ends: 50 [2023-11-26 10:42:49,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:42:49,805 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:49,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 106 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-26 10:42:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-26 10:42:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-26 10:42:49,812 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 17 [2023-11-26 10:42:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:49,813 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-26 10:42:49,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-26 10:42:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:42:49,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:49,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:49,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:42:49,817 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:49,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1495392762, now seen corresponding path program 1 times [2023-11-26 10:42:49,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294225210] [2023-11-26 10:42:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294225210] [2023-11-26 10:42:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294225210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:42:50,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190843257] [2023-11-26 10:42:50,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:42:50,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:42:50,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:42:50,142 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:50,271 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-26 10:42:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:42:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 10:42:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:50,272 INFO L225 Difference]: With dead ends: 49 [2023-11-26 10:42:50,272 INFO L226 Difference]: Without dead ends: 49 [2023-11-26 10:42:50,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:42:50,273 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:50,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-26 10:42:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-26 10:42:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-11-26 10:42:50,276 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 17 [2023-11-26 10:42:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:50,276 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-11-26 10:42:50,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-11-26 10:42:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 10:42:50,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:50,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:50,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:42:50,277 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:50,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash -4187117, now seen corresponding path program 1 times [2023-11-26 10:42:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863501472] [2023-11-26 10:42:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:50,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863501472] [2023-11-26 10:42:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863501472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 10:42:50,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507814556] [2023-11-26 10:42:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:42:50,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:42:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:42:50,430 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:50,558 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-11-26 10:42:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:42:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-26 10:42:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:50,559 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:42:50,559 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:42:50,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:42:50,561 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:50,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:42:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2023-11-26 10:42:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-11-26 10:42:50,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 17 [2023-11-26 10:42:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:50,565 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-11-26 10:42:50,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-11-26 10:42:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:42:50,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:50,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:50,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:42:50,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:50,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash -129724947, now seen corresponding path program 1 times [2023-11-26 10:42:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:50,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081710441] [2023-11-26 10:42:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:50,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081710441] [2023-11-26 10:42:50,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081710441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 10:42:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067720855] [2023-11-26 10:42:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:42:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:42:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:42:50,742 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:50,894 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2023-11-26 10:42:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:42:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-26 10:42:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:50,896 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:42:50,896 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:42:50,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:42:50,897 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:50,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:42:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:42:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2023-11-26 10:42:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.35) internal successors, (54), 48 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-26 10:42:50,900 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2023-11-26 10:42:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:50,900 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-26 10:42:50,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:42:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-26 10:42:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 10:42:50,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:50,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:42:50,901 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:50,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 834773278, now seen corresponding path program 1 times [2023-11-26 10:42:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760077451] [2023-11-26 10:42:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:50,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:51,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:51,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760077451] [2023-11-26 10:42:51,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760077451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:51,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104629136] [2023-11-26 10:42:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:51,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:51,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:51,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:42:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 10:42:51,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:51,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:42:51,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:42:51,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:42:51,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:42:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:42:51,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 10:42:51,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:42:51,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:42:51,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:42:51,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:42:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:51,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:52,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-26 10:42:52,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-11-26 10:42:52,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 107 [2023-11-26 10:42:52,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2023-11-26 10:42:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:52,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104629136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:52,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:42:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 23 [2023-11-26 10:42:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433358072] [2023-11-26 10:42:52,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:42:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:42:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:42:52,650 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:42:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:53,117 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-26 10:42:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:42:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-26 10:42:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:53,119 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:42:53,119 INFO L226 Difference]: Without dead ends: 59 [2023-11-26 10:42:53,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-11-26 10:42:53,120 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:53,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 236 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:42:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-26 10:42:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-11-26 10:42:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 51 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-11-26 10:42:53,123 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2023-11-26 10:42:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:53,124 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-11-26 10:42:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 10:42:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-11-26 10:42:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 10:42:53,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:53,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:53,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:53,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:42:53,326 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:53,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash 108166372, now seen corresponding path program 1 times [2023-11-26 10:42:53,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:53,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898643488] [2023-11-26 10:42:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898643488] [2023-11-26 10:42:53,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898643488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367850467] [2023-11-26 10:42:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:53,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:53,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:42:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:53,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:42:53,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:53,869 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 10:42:53,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 27 [2023-11-26 10:42:53,949 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 10:42:53,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 29 [2023-11-26 10:42:54,048 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~data~0#1.base| Int) (v_DerPreprocessor_1 Int) (|v_ULTIMATE.start_destroy_~l#1.base_18| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_18|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~data~0#1.base| 0) |v_ULTIMATE.start_destroy_~l#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~data~0#1.base|) 0) (= v_DerPreprocessor_1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_18| v_DerPreprocessor_1) |ULTIMATE.start_main_~data~0#1.base| 0) |v_ULTIMATE.start_destroy_~l#1.base_18|)))) is different from true [2023-11-26 10:42:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-26 10:42:54,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:54,165 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_19| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19|) 0)) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_19| 0) |c_ULTIMATE.start_main_~data~0#1.base| 0)))) is different from false [2023-11-26 10:42:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367850467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:54,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-26 10:42:54,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475241497] [2023-11-26 10:42:54,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:42:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:42:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=236, Unknown=2, NotChecked=62, Total=342 [2023-11-26 10:42:54,169 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:54,524 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-26 10:42:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:42:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-26 10:42:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:54,526 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:42:54,526 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:42:54,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=327, Unknown=2, NotChecked=74, Total=462 [2023-11-26 10:42:54,527 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:54,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 167 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2023-11-26 10:42:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:42:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-26 10:42:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-11-26 10:42:54,530 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 22 [2023-11-26 10:42:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:54,530 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-11-26 10:42:54,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 13 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 10:42:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-11-26 10:42:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:42:54,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:54,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:54,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:54,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:54,738 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:54,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1118877622, now seen corresponding path program 1 times [2023-11-26 10:42:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:54,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447402862] [2023-11-26 10:42:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:54,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:42:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:42:55,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:55,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447402862] [2023-11-26 10:42:55,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447402862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:55,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171899837] [2023-11-26 10:42:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:55,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:55,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:55,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:55,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:42:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:42:55,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:55,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:42:55,528 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:42:55,528 INFO L378 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 17 treesize of output 21 [2023-11-26 10:42:55,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:42:55,656 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-26 10:42:55,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-26 10:42:55,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-26 10:42:55,744 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-11-26 10:42:55,784 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-11-26 10:42:55,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-11-26 10:42:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-26 10:42:55,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171899837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:55,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:55,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2023-11-26 10:42:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134099303] [2023-11-26 10:42:55,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:55,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:42:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:55,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:42:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=430, Unknown=1, NotChecked=42, Total=552 [2023-11-26 10:42:55,871 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:42:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:56,132 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-26 10:42:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:42:56,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2023-11-26 10:42:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:56,134 INFO L225 Difference]: With dead ends: 45 [2023-11-26 10:42:56,134 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 10:42:56,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2023-11-26 10:42:56,135 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:56,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 195 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 259 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2023-11-26 10:42:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 10:42:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-26 10:42:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 40 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:42:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-26 10:42:56,138 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 25 [2023-11-26 10:42:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:56,138 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-26 10:42:56,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:42:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-26 10:42:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:42:56,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:56,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:56,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:56,346 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:56,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1118877623, now seen corresponding path program 1 times [2023-11-26 10:42:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:56,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549764139] [2023-11-26 10:42:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:56,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:56,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:56,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:42:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:42:57,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:57,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549764139] [2023-11-26 10:42:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549764139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234924573] [2023-11-26 10:42:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:57,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:57,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:57,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:42:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:57,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 10:42:57,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:57,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:42:57,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:42:57,473 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 10:42:57,473 INFO L378 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 17 treesize of output 21 [2023-11-26 10:42:57,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-26 10:42:57,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:42:57,685 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-26 10:42:57,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2023-11-26 10:42:57,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2023-11-26 10:42:57,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2023-11-26 10:42:57,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2023-11-26 10:42:57,846 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:42:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:42:57,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 10:42:57,881 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-26 10:42:57,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-26 10:42:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-26 10:42:57,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234924573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:58,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:42:58,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2023-11-26 10:42:58,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906322139] [2023-11-26 10:42:58,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:58,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:42:58,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:58,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:42:58,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=677, Unknown=1, NotChecked=52, Total=812 [2023-11-26 10:42:58,047 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:42:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:42:58,663 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-26 10:42:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:42:58,664 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-26 10:42:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:42:58,664 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:42:58,665 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:42:58,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=1161, Unknown=1, NotChecked=70, Total=1406 [2023-11-26 10:42:58,666 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:42:58,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 224 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2023-11-26 10:42:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:42:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-11-26 10:42:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 10:42:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-26 10:42:58,669 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 25 [2023-11-26 10:42:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:42:58,670 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-26 10:42:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 19 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:42:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-26 10:42:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:42:58,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:42:58,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:58,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:58,878 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:42:58,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1288994629, now seen corresponding path program 1 times [2023-11-26 10:42:58,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:58,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805613883] [2023-11-26 10:42:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:59,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:42:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:42:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:42:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805613883] [2023-11-26 10:42:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805613883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415856677] [2023-11-26 10:42:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:59,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:59,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:59,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:59,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:42:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:59,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 10:42:59,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:59,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:42:59,431 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:42:59,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:42:59,502 INFO L378 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 [2023-11-26 10:42:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:59,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:59,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:42:59,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:42:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415856677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:59,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:42:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2023-11-26 10:42:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47642950] [2023-11-26 10:42:59,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:42:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:42:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:42:59,667 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:00,027 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-11-26 10:43:00,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-11-26 10:43:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:00,031 INFO L225 Difference]: With dead ends: 56 [2023-11-26 10:43:00,031 INFO L226 Difference]: Without dead ends: 56 [2023-11-26 10:43:00,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:43:00,032 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:00,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 94 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-26 10:43:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-11-26 10:43:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-26 10:43:00,040 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 26 [2023-11-26 10:43:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:00,041 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-26 10:43:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-26 10:43:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:43:00,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:00,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:00,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:00,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:00,244 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:00,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:00,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1288994628, now seen corresponding path program 1 times [2023-11-26 10:43:00,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:00,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651323584] [2023-11-26 10:43:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:00,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:00,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:00,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651323584] [2023-11-26 10:43:00,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651323584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814543826] [2023-11-26 10:43:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:00,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:43:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:00,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:43:00,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:00,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:00,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:00,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-26 10:43:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:01,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814543826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:01,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:01,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2023-11-26 10:43:01,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844622784] [2023-11-26 10:43:01,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:01,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:43:01,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:01,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:43:01,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:43:01,187 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 21 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:43:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:01,448 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-11-26 10:43:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 10:43:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2023-11-26 10:43:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:01,449 INFO L225 Difference]: With dead ends: 65 [2023-11-26 10:43:01,449 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 10:43:01,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:43:01,450 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:01,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 179 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:43:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 10:43:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2023-11-26 10:43:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-26 10:43:01,454 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2023-11-26 10:43:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:01,455 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-26 10:43:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 10:43:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-26 10:43:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:43:01,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:01,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:01,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:01,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 10:43:01,663 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:01,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1888979954, now seen corresponding path program 1 times [2023-11-26 10:43:01,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:01,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357149973] [2023-11-26 10:43:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:02,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:02,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357149973] [2023-11-26 10:43:02,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357149973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:02,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788455611] [2023-11-26 10:43:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:02,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:02,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:02,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:43:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:03,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-26 10:43:03,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:03,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:03,120 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 10:43:03,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-26 10:43:03,400 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-11-26 10:43:03,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2023-11-26 10:43:03,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:03,637 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:03,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-26 10:43:03,849 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-26 10:43:03,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2023-11-26 10:43:03,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:03,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2023-11-26 10:43:03,983 INFO L378 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 [2023-11-26 10:43:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:03,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:04,397 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (and (forall ((v_ArrVal_1255 Int) (v_ArrVal_1254 (Array Int Int))) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base| v_ArrVal_1255) (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1254) |c_ULTIMATE.start_create_~sll~0#1.base|) 8)) 1)) (forall ((v_ArrVal_1254 (Array Int Int))) (not (= |c_ULTIMATE.start_create_~sll~0#1.base| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1254) |c_ULTIMATE.start_create_~sll~0#1.base|) 8)))))) is different from false [2023-11-26 10:43:04,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:04,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-11-26 10:43:04,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:04,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-26 10:43:04,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 10:43:04,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:04,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-26 10:43:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:04,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-26 10:43:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788455611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:04,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:04,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2023-11-26 10:43:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184424981] [2023-11-26 10:43:04,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-26 10:43:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-26 10:43:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1418, Unknown=17, NotChecked=76, Total=1640 [2023-11-26 10:43:04,693 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 34 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:05,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:05,733 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2023-11-26 10:43:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 10:43:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-11-26 10:43:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:05,734 INFO L225 Difference]: With dead ends: 58 [2023-11-26 10:43:05,734 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 10:43:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=2122, Unknown=18, NotChecked=94, Total=2450 [2023-11-26 10:43:05,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:05,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 186 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:43:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 10:43:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-11-26 10:43:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-11-26 10:43:05,739 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 31 [2023-11-26 10:43:05,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:05,740 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-11-26 10:43:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-11-26 10:43:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-26 10:43:05,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:05,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:05,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 10:43:05,941 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:05,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1888979955, now seen corresponding path program 1 times [2023-11-26 10:43:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748997072] [2023-11-26 10:43:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748997072] [2023-11-26 10:43:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748997072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054793365] [2023-11-26 10:43:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:07,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:07,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:43:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:07,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-26 10:43:07,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:07,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:07,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 10:43:07,868 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:07,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:07,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:43:07,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:08,065 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:08,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-26 10:43:08,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-26 10:43:08,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2023-11-26 10:43:08,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-11-26 10:43:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:08,917 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1367 (Array Int Int)) (v_ArrVal_1366 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_1366) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) 16) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_1367) |c_ULTIMATE.start_create_~sll~0#1.base|) 8)))) (forall ((v_ArrVal_1366 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_1366) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) 8)))) is different from false [2023-11-26 10:43:08,936 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|)))) (and (forall ((v_ArrVal_1366 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1366) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) 8))) (forall ((v_ArrVal_1367 (Array Int Int)) (v_ArrVal_1366 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_1366) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) 16) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_1367) |c_ULTIMATE.start_create_~sll~0#1.base|) 8)))))) is different from false [2023-11-26 10:43:08,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-26 10:43:08,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-26 10:43:08,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-11-26 10:43:08,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:08,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-26 10:43:08,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:09,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-11-26 10:43:09,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:09,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-26 10:43:09,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054793365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:09,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:09,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2023-11-26 10:43:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115568805] [2023-11-26 10:43:09,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-26 10:43:09,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-26 10:43:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1860, Unknown=2, NotChecked=174, Total=2162 [2023-11-26 10:43:09,260 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:10,612 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-11-26 10:43:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:43:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-11-26 10:43:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:10,613 INFO L225 Difference]: With dead ends: 73 [2023-11-26 10:43:10,613 INFO L226 Difference]: Without dead ends: 73 [2023-11-26 10:43:10,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=252, Invalid=3060, Unknown=2, NotChecked=226, Total=3540 [2023-11-26 10:43:10,616 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 305 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:43:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-26 10:43:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2023-11-26 10:43:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-11-26 10:43:10,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 31 [2023-11-26 10:43:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:10,621 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-11-26 10:43:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-11-26 10:43:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 10:43:10,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:10,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:10,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:10,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 10:43:10,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:10,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:10,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1571165040, now seen corresponding path program 1 times [2023-11-26 10:43:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:10,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867388317] [2023-11-26 10:43:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:10,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:11,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867388317] [2023-11-26 10:43:11,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867388317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116249233] [2023-11-26 10:43:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:11,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:11,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:11,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:11,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:43:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:11,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-26 10:43:11,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:11,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:12,142 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:12,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:12,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:12,286 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:12,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-26 10:43:12,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:12,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2023-11-26 10:43:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:12,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:12,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:12,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-11-26 10:43:12,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:12,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-26 10:43:12,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 10:43:12,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116249233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:12,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:12,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2023-11-26 10:43:12,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775678873] [2023-11-26 10:43:12,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 10:43:12,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 10:43:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1355, Unknown=17, NotChecked=0, Total=1482 [2023-11-26 10:43:12,932 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 33 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:13,775 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-11-26 10:43:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:43:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-11-26 10:43:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:13,777 INFO L225 Difference]: With dead ends: 72 [2023-11-26 10:43:13,777 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 10:43:13,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=231, Invalid=2404, Unknown=17, NotChecked=0, Total=2652 [2023-11-26 10:43:13,779 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:13,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 365 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:43:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 10:43:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2023-11-26 10:43:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-11-26 10:43:13,782 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 32 [2023-11-26 10:43:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:13,783 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-11-26 10:43:13,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-11-26 10:43:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:43:13,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:13,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:13,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:13,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 10:43:13,990 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:13,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1461400304, now seen corresponding path program 1 times [2023-11-26 10:43:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:13,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628672280] [2023-11-26 10:43:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:13,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:14,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628672280] [2023-11-26 10:43:14,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628672280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:14,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615950624] [2023-11-26 10:43:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:14,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:14,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 10:43:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:15,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 10:43:15,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:15,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:15,255 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:15,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:15,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 10:43:15,407 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-26 10:43:15,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-26 10:43:15,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:15,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2023-11-26 10:43:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:15,783 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1584 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_1584) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:15,790 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1584 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|)) v_ArrVal_1584) |c_ULTIMATE.start_create_~sll~0#1.base|) 8) |c_#StackHeapBarrier|)) is different from false [2023-11-26 10:43:15,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:15,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-26 10:43:15,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:15,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-11-26 10:43:15,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-26 10:43:15,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615950624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:15,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:15,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2023-11-26 10:43:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390513097] [2023-11-26 10:43:15,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-26 10:43:15,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-26 10:43:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1096, Unknown=2, NotChecked=134, Total=1332 [2023-11-26 10:43:15,929 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 31 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:16,886 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-11-26 10:43:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 10:43:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-11-26 10:43:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:16,888 INFO L225 Difference]: With dead ends: 70 [2023-11-26 10:43:16,888 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 10:43:16,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=1870, Unknown=2, NotChecked=178, Total=2256 [2023-11-26 10:43:16,890 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:16,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 305 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:43:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 10:43:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2023-11-26 10:43:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-11-26 10:43:16,903 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 33 [2023-11-26 10:43:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:16,904 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-11-26 10:43:16,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 10:43:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-11-26 10:43:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:43:16,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:16,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:16,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:17,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 10:43:17,112 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:17,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash 691747431, now seen corresponding path program 2 times [2023-11-26 10:43:17,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:17,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370275357] [2023-11-26 10:43:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:17,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:17,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:43:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370275357] [2023-11-26 10:43:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370275357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174401228] [2023-11-26 10:43:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:17,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:17,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 10:43:17,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:17,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 10:43:17,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:17,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:17,898 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:17,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:18,000 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 10:43:18,001 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-26 10:43:18,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-26 10:43:18,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 10:43:18,141 INFO L378 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 [2023-11-26 10:43:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:43:18,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:18,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:43:18,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-26 10:43:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:43:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174401228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:18,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:18,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 27 [2023-11-26 10:43:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767736463] [2023-11-26 10:43:18,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:18,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:43:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:43:18,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-11-26 10:43:18,623 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 28 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:43:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:19,068 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-11-26 10:43:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 10:43:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-11-26 10:43:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:19,070 INFO L225 Difference]: With dead ends: 60 [2023-11-26 10:43:19,070 INFO L226 Difference]: Without dead ends: 60 [2023-11-26 10:43:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 10:43:19,071 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:19,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 196 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:43:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-26 10:43:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-11-26 10:43:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-26 10:43:19,075 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 36 [2023-11-26 10:43:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:19,075 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-26 10:43:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:43:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-26 10:43:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:43:19,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:19,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:19,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:19,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 10:43:19,277 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:19,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 691747432, now seen corresponding path program 2 times [2023-11-26 10:43:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283253787] [2023-11-26 10:43:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:19,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:19,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 10:43:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 10:43:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283253787] [2023-11-26 10:43:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283253787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:19,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319647344] [2023-11-26 10:43:19,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:19,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:19,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:19,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 10:43:20,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:20,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 10:43:20,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:20,198 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-11-26 10:43:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:20,214 INFO L378 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 [2023-11-26 10:43:20,225 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:20,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 10:43:20,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319647344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:20,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:43:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-11-26 10:43:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888578549] [2023-11-26 10:43:20,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:43:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:43:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=364, Unknown=1, NotChecked=38, Total=462 [2023-11-26 10:43:20,505 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 10:43:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:43:20,822 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-11-26 10:43:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:43:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2023-11-26 10:43:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:43:20,823 INFO L225 Difference]: With dead ends: 59 [2023-11-26 10:43:20,823 INFO L226 Difference]: Without dead ends: 59 [2023-11-26 10:43:20,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=516, Unknown=1, NotChecked=46, Total=650 [2023-11-26 10:43:20,824 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:43:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 182 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2023-11-26 10:43:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-26 10:43:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-11-26 10:43:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 10:43:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-26 10:43:20,837 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 36 [2023-11-26 10:43:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:43:20,840 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-26 10:43:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 10:43:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-26 10:43:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 10:43:20,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:43:20,842 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:20,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:21,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 10:43:21,042 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-26 10:43:21,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1507126043, now seen corresponding path program 2 times [2023-11-26 10:43:21,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:21,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290029639] [2023-11-26 10:43:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:21,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-26 10:43:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:22,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 10:43:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:43:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290029639] [2023-11-26 10:43:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290029639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:22,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623967181] [2023-11-26 10:43:22,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:22,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:22,819 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:22,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fddf2875-66cf-4eb3-a825-35a9c9a8a7bf/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 10:43:23,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:23,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:23,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-26 10:43:23,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:23,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 10:43:23,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:43:23,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 10:43:23,456 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 10:43:23,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 10:43:23,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-26 10:43:23,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-26 10:43:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 10:43:23,775 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-26 10:43:23,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 56 [2023-11-26 10:43:23,790 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-26 10:43:23,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2023-11-26 10:43:25,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:25,003 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 10:43:25,017 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-11-26 10:43:25,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 48 [2023-11-26 10:43:25,051 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2023-11-26 10:43:25,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2023-11-26 10:43:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:25,100 INFO L327 TraceCheckSpWp]: Computing backward predicates...