./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/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_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/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_af603fc7-850d-47ab-8949-dd03b8462558/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 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:43,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:43,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 11:53:43,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:43,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:43,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:43,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:43,228 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:43,229 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:43,234 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:43,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:43,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:43,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:43,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:43,238 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:43,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:43,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:43,239 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:43,240 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:53:43,240 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:53:43,242 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:53:43,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:43,243 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:53:43,244 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:53:43,244 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:43,245 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:43,245 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:43,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:43,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:43,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:43,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:43,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:43,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:43,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:43,249 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:43,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:43,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:43,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:43,250 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_af603fc7-850d-47ab-8949-dd03b8462558/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e [2023-11-26 11:53:43,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:43,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:43,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:43,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:43,534 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:43,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2023-11-26 11:53:46,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:47,138 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:47,148 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2023-11-26 11:53:47,178 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/data/54e429d8e/a3fe90fe43c641aebb1dfc452b932697/FLAGd34371e1a [2023-11-26 11:53:47,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/data/54e429d8e/a3fe90fe43c641aebb1dfc452b932697 [2023-11-26 11:53:47,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:47,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:47,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:47,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:47,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:47,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2367ac76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47, skipping insertion in model container [2023-11-26 11:53:47,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,292 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:47,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:47,652 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:47,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:47,759 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:47,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47 WrapperNode [2023-11-26 11:53:47,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:47,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:47,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:47,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:47,770 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,839 INFO L138 Inliner]: procedures = 122, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 89 [2023-11-26 11:53:47,840 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:47,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:47,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:47,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:47,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,874 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,917 INFO L175 MemorySlicer]: Split 16 memory accesses to 1 slices as follows [16]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2023-11-26 11:53:47,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,942 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:47,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:47,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:47,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:47,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (1/1) ... [2023-11-26 11:53:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:47,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:48,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:48,033 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-11-26 11:53:48,034 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-11-26 11:53:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2023-11-26 11:53:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2023-11-26 11:53:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-26 11:53:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-26 11:53:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:53:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:53:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:53:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:53:48,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:48,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:48,200 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:48,202 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:48,666 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:48,740 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:48,741 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 11:53:48,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:48 BoogieIcfgContainer [2023-11-26 11:53:48,741 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:48,744 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:48,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:48,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:48,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:47" (1/3) ... [2023-11-26 11:53:48,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1338a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:48, skipping insertion in model container [2023-11-26 11:53:48,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:47" (2/3) ... [2023-11-26 11:53:48,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1338a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:48, skipping insertion in model container [2023-11-26 11:53:48,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:48" (3/3) ... [2023-11-26 11:53:48,752 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll.i [2023-11-26 11:53:48,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:48,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-26 11:53:48,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:48,847 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;@6bd1ac1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:48,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-26 11:53:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 81 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:53:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:53:48,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:48,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:53:48,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:48,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 6991277, now seen corresponding path program 1 times [2023-11-26 11:53:48,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:48,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183460890] [2023-11-26 11:53:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,182 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 11:53:49,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183460890] [2023-11-26 11:53:49,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183460890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790192646] [2023-11-26 11:53:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:49,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:49,250 INFO L87 Difference]: Start difference. First operand has 91 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 81 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 11:53:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:49,431 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2023-11-26 11:53:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-11-26 11:53:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:49,446 INFO L225 Difference]: With dead ends: 89 [2023-11-26 11:53:49,446 INFO L226 Difference]: Without dead ends: 88 [2023-11-26 11:53:49,448 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 11:53:49,453 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:49,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-26 11:53:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-26 11:53:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 42 states have (on average 2.0) internal successors, (84), 78 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:53:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2023-11-26 11:53:49,507 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 4 [2023-11-26 11:53:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:49,508 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2023-11-26 11:53:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 11:53:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2023-11-26 11:53:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-26 11:53:49,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:49,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-26 11:53:49,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:53:49,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:49,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash 6991278, now seen corresponding path program 1 times [2023-11-26 11:53:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:49,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619849652] [2023-11-26 11:53:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,664 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 11:53:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619849652] [2023-11-26 11:53:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619849652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940523520] [2023-11-26 11:53:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:49,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:49,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:49,668 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 11:53:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:49,755 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-11-26 11:53:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-11-26 11:53:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:49,757 INFO L225 Difference]: With dead ends: 86 [2023-11-26 11:53:49,757 INFO L226 Difference]: Without dead ends: 86 [2023-11-26 11:53:49,757 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 11:53:49,759 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:49,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-26 11:53:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-26 11:53:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:53:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-26 11:53:49,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 4 [2023-11-26 11:53:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:49,771 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-26 11:53:49,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 11:53:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-26 11:53:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:53:49,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:49,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:49,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:53:49,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:49,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -939442667, now seen corresponding path program 1 times [2023-11-26 11:53:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:49,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227387191] [2023-11-26 11:53:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:49,885 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 11:53:49,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227387191] [2023-11-26 11:53:49,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227387191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:49,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912860532] [2023-11-26 11:53:49,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:49,889 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:50,032 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-11-26 11:53:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 11:53:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:50,051 INFO L225 Difference]: With dead ends: 85 [2023-11-26 11:53:50,051 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 11:53:50,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 11:53:50,053 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 11:53:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-26 11:53:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 75 states have internal predecessors, (81), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:53:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2023-11-26 11:53:50,063 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 11 [2023-11-26 11:53:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:50,065 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2023-11-26 11:53:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2023-11-26 11:53:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 11:53:50,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:50,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:53:50,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:50,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash -939442666, now seen corresponding path program 1 times [2023-11-26 11:53:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:50,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005512214] [2023-11-26 11:53:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,222 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 11:53:50,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005512214] [2023-11-26 11:53:50,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005512214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:50,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:50,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688740963] [2023-11-26 11:53:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:50,227 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:50,376 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-11-26 11:53:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 11:53:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:50,378 INFO L225 Difference]: With dead ends: 84 [2023-11-26 11:53:50,379 INFO L226 Difference]: Without dead ends: 84 [2023-11-26 11:53:50,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 11:53:50,390 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:50,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 160 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-26 11:53:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-26 11:53:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:53:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-11-26 11:53:50,412 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 11 [2023-11-26 11:53:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:50,413 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-11-26 11:53:50,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:53:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-11-26 11:53:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:53:50,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:50,415 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 11:53:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:53:50,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149562, now seen corresponding path program 1 times [2023-11-26 11:53:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280069308] [2023-11-26 11:53:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:53:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280069308] [2023-11-26 11:53:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280069308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:53:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989226229] [2023-11-26 11:53:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:53:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:53:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:50,921 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:51,376 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2023-11-26 11:53:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-11-26 11:53:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:51,380 INFO L225 Difference]: With dead ends: 101 [2023-11-26 11:53:51,380 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 11:53:51,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:53:51,382 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 25 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:51,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 282 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 11:53:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-11-26 11:53:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 81 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-26 11:53:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-11-26 11:53:51,393 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 18 [2023-11-26 11:53:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:51,394 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-11-26 11:53:51,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-11-26 11:53:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 11:53:51,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:51,395 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 11:53:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:53:51,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:51,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149563, now seen corresponding path program 1 times [2023-11-26 11:53:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416527560] [2023-11-26 11:53:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:53:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:51,996 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 11:53:51,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:52,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416527560] [2023-11-26 11:53:52,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416527560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:52,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:52,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-26 11:53:52,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403901488] [2023-11-26 11:53:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:53:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:53:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:53:52,013 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:52,494 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2023-11-26 11:53:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:53:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-11-26 11:53:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:52,497 INFO L225 Difference]: With dead ends: 106 [2023-11-26 11:53:52,497 INFO L226 Difference]: Without dead ends: 106 [2023-11-26 11:53:52,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:53:52,498 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 19 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:52,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 320 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-26 11:53:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2023-11-26 11:53:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.8070175438596492) internal successors, (103), 87 states have internal predecessors, (103), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-26 11:53:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2023-11-26 11:53:52,526 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 18 [2023-11-26 11:53:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:52,527 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2023-11-26 11:53:52,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2023-11-26 11:53:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:53:52,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:52,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:52,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:53:52,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:52,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403091, now seen corresponding path program 1 times [2023-11-26 11:53:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:52,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312017080] [2023-11-26 11:53:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:52,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:52,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:52,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:53:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:52,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:53:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:52,820 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 11:53:52,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312017080] [2023-11-26 11:53:52,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312017080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741621653] [2023-11-26 11:53:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:52,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:52,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:52,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:52,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:52,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:53:52,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:53,065 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 11:53:53,257 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:53:53,308 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:53:53,309 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 11:53:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:53:53,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741621653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:53,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:53,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-26 11:53:53,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596881263] [2023-11-26 11:53:53,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:53,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:53:53,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:53:53,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-26 11:53:53,393 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:53:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:53,834 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2023-11-26 11:53:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-11-26 11:53:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:53,836 INFO L225 Difference]: With dead ends: 104 [2023-11-26 11:53:53,837 INFO L226 Difference]: Without dead ends: 104 [2023-11-26 11:53:53,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-26 11:53:53,838 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:53,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 304 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 326 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2023-11-26 11:53:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-26 11:53:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-11-26 11:53:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.793103448275862) internal successors, (104), 87 states have internal predecessors, (104), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-26 11:53:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2023-11-26 11:53:53,845 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 20 [2023-11-26 11:53:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:53,846 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2023-11-26 11:53:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-26 11:53:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2023-11-26 11:53:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:53:53,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:53,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:53,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:54,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:54,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:54,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403090, now seen corresponding path program 1 times [2023-11-26 11:53:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292203959] [2023-11-26 11:53:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:53:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:53:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,505 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 11:53:54,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292203959] [2023-11-26 11:53:54,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292203959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:54,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931765658] [2023-11-26 11:53:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:54,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:53:54,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:54,639 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 11:53:54,817 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:53:54,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:54,842 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 11:53:54,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:53:54,851 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 11:53:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:53:54,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:55,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931765658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:55,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-26 11:53:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045980263] [2023-11-26 11:53:55,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:53:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:53:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-11-26 11:53:55,015 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:55,667 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-11-26 11:53:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:53:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 20 [2023-11-26 11:53:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:55,672 INFO L225 Difference]: With dead ends: 103 [2023-11-26 11:53:55,672 INFO L226 Difference]: Without dead ends: 103 [2023-11-26 11:53:55,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=349, Unknown=1, NotChecked=38, Total=462 [2023-11-26 11:53:55,674 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:55,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 497 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 554 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2023-11-26 11:53:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-26 11:53:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-26 11:53:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 86 states have internal predecessors, (102), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-26 11:53:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2023-11-26 11:53:55,680 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 20 [2023-11-26 11:53:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:55,680 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2023-11-26 11:53:55,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 11:53:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2023-11-26 11:53:55,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:53:55,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:55,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:55,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:55,890 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:55,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:55,891 INFO L85 PathProgramCache]: Analyzing trace with hash -222925609, now seen corresponding path program 1 times [2023-11-26 11:53:55,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:55,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316430523] [2023-11-26 11:53:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:53:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,017 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 11:53:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316430523] [2023-11-26 11:53:56,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316430523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:56,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:56,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:56,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882392057] [2023-11-26 11:53:56,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:56,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:56,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:56,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:56,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:53:56,020 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:56,208 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2023-11-26 11:53:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:53:56,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-26 11:53:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:56,211 INFO L225 Difference]: With dead ends: 122 [2023-11-26 11:53:56,211 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 11:53:56,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:56,214 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:56,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 215 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 11:53:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2023-11-26 11:53:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 94 states have internal predecessors, (122), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 11:53:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2023-11-26 11:53:56,225 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 23 [2023-11-26 11:53:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:56,227 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2023-11-26 11:53:56,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2023-11-26 11:53:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:53:56,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:56,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:53:56,231 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:56,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash -222925608, now seen corresponding path program 1 times [2023-11-26 11:53:56,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:56,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318709074] [2023-11-26 11:53:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:53:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:56,528 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 11:53:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318709074] [2023-11-26 11:53:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318709074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:56,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:56,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:53:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381456377] [2023-11-26 11:53:56,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:53:56,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:53:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:56,531 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:56,787 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2023-11-26 11:53:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-26 11:53:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:56,790 INFO L225 Difference]: With dead ends: 128 [2023-11-26 11:53:56,790 INFO L226 Difference]: Without dead ends: 128 [2023-11-26 11:53:56,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 11:53:56,791 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:56,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 403 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-26 11:53:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2023-11-26 11:53:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 101 states have internal predecessors, (133), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 11:53:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2023-11-26 11:53:56,800 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 23 [2023-11-26 11:53:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:56,801 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2023-11-26 11:53:56,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:53:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2023-11-26 11:53:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:53:56,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:56,808 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 11:53:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:53:56,809 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:56,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash -126915569, now seen corresponding path program 1 times [2023-11-26 11:53:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627660711] [2023-11-26 11:53:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:56,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:53:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:53:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:53:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:53:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627660711] [2023-11-26 11:53:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627660711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744962465] [2023-11-26 11:53:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:57,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:57,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:57,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:57,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:57,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 11:53:57,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:57,829 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 11:53:57,953 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-26 11:53:58,153 INFO L349 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2023-11-26 11:53:58,154 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 54 [2023-11-26 11:53:58,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:53:58,254 INFO L349 Elim1Store]: treesize reduction 79, result has 6.0 percent of original size [2023-11-26 11:53:58,254 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 5 case distinctions, treesize of input 25 treesize of output 17 [2023-11-26 11:53:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:53:58,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:58,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744962465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:58,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2023-11-26 11:53:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199357646] [2023-11-26 11:53:58,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:53:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:53:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=396, Unknown=1, NotChecked=42, Total=552 [2023-11-26 11:53:58,591 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-26 11:53:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:59,591 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2023-11-26 11:53:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:53:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 26 [2023-11-26 11:53:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:59,594 INFO L225 Difference]: With dead ends: 137 [2023-11-26 11:53:59,595 INFO L226 Difference]: Without dead ends: 137 [2023-11-26 11:53:59,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=664, Unknown=1, NotChecked=56, Total=930 [2023-11-26 11:53:59,596 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 34 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:59,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 491 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 662 Invalid, 15 Unknown, 120 Unchecked, 0.8s Time] [2023-11-26 11:53:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-26 11:53:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2023-11-26 11:53:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.75) internal successors, (140), 106 states have internal predecessors, (140), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:53:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2023-11-26 11:53:59,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 26 [2023-11-26 11:53:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:59,608 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2023-11-26 11:53:59,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-26 11:53:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2023-11-26 11:53:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:53:59,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:59,610 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 11:53:59,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:59,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:59,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:53:59,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -126915568, now seen corresponding path program 1 times [2023-11-26 11:53:59,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:59,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375243815] [2023-11-26 11:53:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:59,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:00,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:00,939 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 11:54:00,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:00,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375243815] [2023-11-26 11:54:00,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375243815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:00,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404817760] [2023-11-26 11:54:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:00,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:00,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:00,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:54:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:01,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-26 11:54:01,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:01,090 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 11:54:01,096 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 11:54:01,456 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:54:01,484 WARN L876 $PredicateComparison]: unable to prove that (exists ((create_internal_~now~0.base Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (= (store (store |c_old(#length)| create_internal_~now~0.base (select |c_#length| create_internal_~now~0.base)) alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| create_internal_~now~0.base) 0) (= (select (store |c_old(#valid)| create_internal_~now~0.base 1) alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:54:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:01,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-26 11:54:01,572 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-26 11:54:01,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-26 11:54:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-26 11:54:01,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:01,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404817760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:01,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:01,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-11-26 11:54:01,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858433734] [2023-11-26 11:54:01,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:01,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:54:01,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:54:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=599, Unknown=2, NotChecked=102, Total=812 [2023-11-26 11:54:01,921 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-26 11:54:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:02,859 INFO L93 Difference]: Finished difference Result 141 states and 191 transitions. [2023-11-26 11:54:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:54:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2023-11-26 11:54:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:02,862 INFO L225 Difference]: With dead ends: 141 [2023-11-26 11:54:02,862 INFO L226 Difference]: Without dead ends: 141 [2023-11-26 11:54:02,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=904, Unknown=2, NotChecked=126, Total=1190 [2023-11-26 11:54:02,864 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 46 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:02,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 412 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 248 Unchecked, 0.6s Time] [2023-11-26 11:54:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-26 11:54:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2023-11-26 11:54:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 104 states have internal predecessors, (137), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 11:54:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2023-11-26 11:54:02,872 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 26 [2023-11-26 11:54:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:02,872 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2023-11-26 11:54:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-26 11:54:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2023-11-26 11:54:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:54:02,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:02,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:02,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:54:03,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:03,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:03,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 516824054, now seen corresponding path program 1 times [2023-11-26 11:54:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216264153] [2023-11-26 11:54:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,336 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 11:54:03,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:03,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216264153] [2023-11-26 11:54:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216264153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:03,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:54:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662023053] [2023-11-26 11:54:03,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:03,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:54:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:54:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:54:03,340 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:03,506 INFO L93 Difference]: Finished difference Result 133 states and 173 transitions. [2023-11-26 11:54:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:54:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-26 11:54:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:03,508 INFO L225 Difference]: With dead ends: 133 [2023-11-26 11:54:03,508 INFO L226 Difference]: Without dead ends: 133 [2023-11-26 11:54:03,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:54:03,509 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 26 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:03,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 405 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:54:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-26 11:54:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2023-11-26 11:54:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.7215189873417722) internal successors, (136), 105 states have internal predecessors, (136), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-26 11:54:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2023-11-26 11:54:03,517 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 25 [2023-11-26 11:54:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:03,519 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2023-11-26 11:54:03,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2023-11-26 11:54:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:54:03,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:03,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:03,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:54:03,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:03,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash 516984702, now seen corresponding path program 1 times [2023-11-26 11:54:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265113111] [2023-11-26 11:54:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:03,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:04,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:04,060 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 11:54:04,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:04,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265113111] [2023-11-26 11:54:04,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265113111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:04,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:04,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-26 11:54:04,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863595928] [2023-11-26 11:54:04,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:04,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:54:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:54:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:54:04,064 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:04,525 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2023-11-26 11:54:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:54:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-26 11:54:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:04,527 INFO L225 Difference]: With dead ends: 148 [2023-11-26 11:54:04,527 INFO L226 Difference]: Without dead ends: 148 [2023-11-26 11:54:04,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:54:04,528 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 37 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:04,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 538 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:54:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-26 11:54:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2023-11-26 11:54:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.6818181818181819) internal successors, (148), 114 states have internal predecessors, (148), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2023-11-26 11:54:04,536 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 25 [2023-11-26 11:54:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:04,537 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2023-11-26 11:54:04,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2023-11-26 11:54:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:54:04,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:04,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:54:04,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:04,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash 516984703, now seen corresponding path program 1 times [2023-11-26 11:54:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:04,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736524761] [2023-11-26 11:54:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:04,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:05,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:05,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:05,311 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 11:54:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736524761] [2023-11-26 11:54:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736524761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:05,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-26 11:54:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493293888] [2023-11-26 11:54:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:54:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:54:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:54:05,315 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:05,910 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2023-11-26 11:54:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:54:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-26 11:54:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:05,912 INFO L225 Difference]: With dead ends: 147 [2023-11-26 11:54:05,912 INFO L226 Difference]: Without dead ends: 147 [2023-11-26 11:54:05,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:54:05,913 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 36 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:05,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 660 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:54:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-26 11:54:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2023-11-26 11:54:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.6704545454545454) internal successors, (147), 114 states have internal predecessors, (147), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2023-11-26 11:54:05,924 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 25 [2023-11-26 11:54:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2023-11-26 11:54:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:54:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2023-11-26 11:54:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:54:05,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:05,926 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:05,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:54:05,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1667922174, now seen corresponding path program 1 times [2023-11-26 11:54:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57790958] [2023-11-26 11:54:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:06,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:54:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:54:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 11:54:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:54:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:06,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57790958] [2023-11-26 11:54:06,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57790958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:06,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826340461] [2023-11-26 11:54:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:06,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:06,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:06,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:06,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:54:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:06,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:54:06,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:06,372 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 11:54:06,392 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 15 treesize of output 1 [2023-11-26 11:54:06,399 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 17 treesize of output 9 [2023-11-26 11:54:06,425 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:54:06,450 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:54:06,450 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 11:54:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:54:06,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826340461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:06,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-26 11:54:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293907404] [2023-11-26 11:54:06,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:06,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:54:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:54:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-26 11:54:06,514 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:54:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:06,912 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2023-11-26 11:54:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:54:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-26 11:54:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:06,914 INFO L225 Difference]: With dead ends: 132 [2023-11-26 11:54:06,914 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 11:54:06,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-11-26 11:54:06,916 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 13 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:06,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 417 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 403 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2023-11-26 11:54:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 11:54:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-26 11:54:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 113 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2023-11-26 11:54:06,923 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 28 [2023-11-26 11:54:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:06,923 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2023-11-26 11:54:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 11:54:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2023-11-26 11:54:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:54:06,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:06,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:06,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:54:07,132 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:07,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1667922173, now seen corresponding path program 1 times [2023-11-26 11:54:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:07,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726318774] [2023-11-26 11:54:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-26 11:54:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:54:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-26 11:54:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:54:07,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:07,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726318774] [2023-11-26 11:54:07,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726318774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730471533] [2023-11-26 11:54:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:07,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:07,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:07,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:07,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:54:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:54:07,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:07,847 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 11:54:07,951 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 15 treesize of output 1 [2023-11-26 11:54:07,955 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 15 treesize of output 1 [2023-11-26 11:54:07,999 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 32 treesize of output 20 [2023-11-26 11:54:08,005 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 26 treesize of output 14 [2023-11-26 11:54:08,080 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:54:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:08,100 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 11:54:08,110 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:54:08,111 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 11:54:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-26 11:54:08,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:08,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730471533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:08,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-26 11:54:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536183894] [2023-11-26 11:54:08,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:08,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:54:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:54:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=294, Unknown=1, NotChecked=34, Total=380 [2023-11-26 11:54:08,235 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:54:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:08,831 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2023-11-26 11:54:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:54:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-11-26 11:54:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:08,834 INFO L225 Difference]: With dead ends: 131 [2023-11-26 11:54:08,834 INFO L226 Difference]: Without dead ends: 131 [2023-11-26 11:54:08,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2023-11-26 11:54:08,836 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:08,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 523 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 577 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2023-11-26 11:54:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-26 11:54:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-26 11:54:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 112 states have internal predecessors, (145), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2023-11-26 11:54:08,845 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 28 [2023-11-26 11:54:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:08,845 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2023-11-26 11:54:08,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 11:54:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2023-11-26 11:54:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:54:08,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:08,847 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, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:08,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:09,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:54:09,054 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:09,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1393785251, now seen corresponding path program 1 times [2023-11-26 11:54:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:09,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854632385] [2023-11-26 11:54:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:09,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:09,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:10,016 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 11:54:10,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854632385] [2023-11-26 11:54:10,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854632385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:10,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326492461] [2023-11-26 11:54:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:10,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:10,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:10,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:10,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:54:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:10,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-26 11:54:10,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:10,185 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 11:54:10,381 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 11:54:10,388 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 11:54:10,476 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:54:10,477 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 11:54:10,536 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 11:54:10,545 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 27 treesize of output 26 [2023-11-26 11:54:10,807 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 11:54:10,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:11,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:54:11,316 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 6 case distinctions, treesize of input 1236 treesize of output 1208 [2023-11-26 11:54:12,014 INFO L349 Elim1Store]: treesize reduction 258, result has 45.9 percent of original size [2023-11-26 11:54:12,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 1945 treesize of output 1977 [2023-11-26 11:54:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326492461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:21,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:21,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2023-11-26 11:54:21,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230754523] [2023-11-26 11:54:21,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:21,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:54:21,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:54:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2023-11-26 11:54:21,508 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:54:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:22,583 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2023-11-26 11:54:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:54:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-11-26 11:54:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:22,585 INFO L225 Difference]: With dead ends: 136 [2023-11-26 11:54:22,585 INFO L226 Difference]: Without dead ends: 136 [2023-11-26 11:54:22,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 11:54:22,587 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 27 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:22,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1025 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:54:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-26 11:54:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-11-26 11:54:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.6404494382022472) internal successors, (146), 113 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2023-11-26 11:54:22,596 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 27 [2023-11-26 11:54:22,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:22,597 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2023-11-26 11:54:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:54:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2023-11-26 11:54:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:54:22,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:22,598 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:22,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:54:22,813 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:22,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash -262943231, now seen corresponding path program 1 times [2023-11-26 11:54:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699700576] [2023-11-26 11:54:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:23,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:23,713 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 11:54:23,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:23,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699700576] [2023-11-26 11:54:23,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699700576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:23,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699230142] [2023-11-26 11:54:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:23,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:23,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:54:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:23,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 11:54:23,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:24,056 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 11:54:24,121 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 20 treesize of output 8 [2023-11-26 11:54:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:24,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:24,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699230142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:24,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2023-11-26 11:54:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793246811] [2023-11-26 11:54:24,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:54:24,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:54:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:54:24,149 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:54:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:24,433 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2023-11-26 11:54:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:54:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-26 11:54:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:24,435 INFO L225 Difference]: With dead ends: 144 [2023-11-26 11:54:24,435 INFO L226 Difference]: Without dead ends: 144 [2023-11-26 11:54:24,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:54:24,436 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 35 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:24,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 619 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:54:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-26 11:54:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2023-11-26 11:54:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 90 states have (on average 1.6222222222222222) internal successors, (146), 114 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 176 transitions. [2023-11-26 11:54:24,442 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 176 transitions. Word has length 28 [2023-11-26 11:54:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:24,443 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 176 transitions. [2023-11-26 11:54:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:54:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 176 transitions. [2023-11-26 11:54:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:54:24,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:24,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:24,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:24,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:24,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1485928130, now seen corresponding path program 1 times [2023-11-26 11:54:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071812595] [2023-11-26 11:54:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:25,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:25,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:25,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:25,509 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 11:54:25,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071812595] [2023-11-26 11:54:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071812595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571575954] [2023-11-26 11:54:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:25,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:25,512 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:25,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:54:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:25,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-26 11:54:25,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:25,685 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 11:54:25,709 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 11:54:25,716 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 11:54:25,728 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 11:54:25,735 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 11:54:25,906 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|))) is different from true [2023-11-26 11:54:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:25,966 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 16 treesize of output 11 [2023-11-26 11:54:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:25,976 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 16 treesize of output 11 [2023-11-26 11:54:25,987 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:54:25,988 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 11:54:26,037 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-26 11:54:26,037 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-26 11:54:26,057 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-26 11:54:26,057 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-26 11:54:26,236 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 11:54:26,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571575954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:26,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:54:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2023-11-26 11:54:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284454258] [2023-11-26 11:54:26,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:54:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:54:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=575, Unknown=1, NotChecked=48, Total=702 [2023-11-26 11:54:26,649 INFO L87 Difference]: Start difference. First operand 133 states and 176 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:54:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:27,546 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2023-11-26 11:54:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:54:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-11-26 11:54:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:27,549 INFO L225 Difference]: With dead ends: 137 [2023-11-26 11:54:27,549 INFO L226 Difference]: Without dead ends: 137 [2023-11-26 11:54:27,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=930, Unknown=1, NotChecked=62, Total=1122 [2023-11-26 11:54:27,550 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:27,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 772 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 669 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2023-11-26 11:54:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-26 11:54:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2023-11-26 11:54:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 93 states have (on average 1.6021505376344085) internal successors, (149), 117 states have internal predecessors, (149), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-26 11:54:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2023-11-26 11:54:27,557 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 30 [2023-11-26 11:54:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:27,558 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2023-11-26 11:54:27,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-26 11:54:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2023-11-26 11:54:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:54:27,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:27,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:27,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:27,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:27,766 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-26 11:54:27,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:27,766 INFO L85 PathProgramCache]: Analyzing trace with hash 63131556, now seen corresponding path program 2 times [2023-11-26 11:54:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790365804] [2023-11-26 11:54:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:54:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-26 11:54:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 11:54:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:29,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-26 11:54:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:54:29,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790365804] [2023-11-26 11:54:29,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790365804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:29,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476852855] [2023-11-26 11:54:29,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:54:29,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:29,868 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:29,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af603fc7-850d-47ab-8949-dd03b8462558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:54:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:54:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:54:30,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 11:54:30,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:30,063 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 11:54:30,195 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-26 11:54:30,216 WARN L854 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse0) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) is different from false