./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/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_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/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 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:06,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:07,108 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:50:07,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:07,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:07,157 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:07,158 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:07,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:07,159 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:07,164 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:07,165 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:07,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:07,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:07,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:07,168 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:07,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:07,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:07,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:07,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:07,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:07,171 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:50:07,172 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:50:07,172 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:50:07,172 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:07,173 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:50:07,173 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:50:07,174 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:07,174 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:07,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:07,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:07,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:07,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:07,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:07,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:07,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:07,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:07,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:07,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:07,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:07,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:07,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:07,180 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_036913cd-9379-4af6-87ef-9695338b945a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2023-11-26 11:50:07,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:07,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:07,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:07,561 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:07,561 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:07,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-26 11:50:10,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:11,025 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:11,026 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-26 11:50:11,043 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/data/4ee9ce631/3f5e94d10f5344a09cc71f224c3e24fe/FLAG09e81b0a5 [2023-11-26 11:50:11,057 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/data/4ee9ce631/3f5e94d10f5344a09cc71f224c3e24fe [2023-11-26 11:50:11,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:11,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:11,063 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:11,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:11,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:11,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764bb188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11, skipping insertion in model container [2023-11-26 11:50:11,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,120 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:11,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:11,579 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:11,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:11,673 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:11,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11 WrapperNode [2023-11-26 11:50:11,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:11,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:11,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:11,675 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:11,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,754 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2023-11-26 11:50:11,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:11,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:11,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:11,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:11,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,803 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [9, 9, 6]. 38 percent of accesses are in the largest equivalence class. The 21 initializations are split as follows [6, 9, 6]. The 0 writes are split as follows [0, 0, 0]. [2023-11-26 11:50:11,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,830 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:11,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:11,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:11,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:11,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (1/1) ... [2023-11-26 11:50:11,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:11,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:11,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:50:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:50:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:50:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2023-11-26 11:50:11,946 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2023-11-26 11:50:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:50:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:50:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:50:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:50:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:50:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:50:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:50:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:50:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:50:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:50:11,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:11,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:12,138 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:12,140 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:12,460 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:12,517 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:12,517 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:50:12,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:12 BoogieIcfgContainer [2023-11-26 11:50:12,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:12,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:12,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:12,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:12,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:11" (1/3) ... [2023-11-26 11:50:12,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426e434a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:12, skipping insertion in model container [2023-11-26 11:50:12,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:11" (2/3) ... [2023-11-26 11:50:12,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426e434a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:12, skipping insertion in model container [2023-11-26 11:50:12,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:12" (3/3) ... [2023-11-26 11:50:12,531 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2023-11-26 11:50:12,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:12,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-26 11:50:12,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:12,623 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;@42d8ad27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:12,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 11:50:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 54 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:50:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:50:12,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:12,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:12,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:12,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash 131378568, now seen corresponding path program 1 times [2023-11-26 11:50:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12268771] [2023-11-26 11:50:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:12,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,044 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 11:50:13,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12268771] [2023-11-26 11:50:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12268771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:13,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:13,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961906819] [2023-11-26 11:50:13,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:13,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:13,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:13,091 INFO L87 Difference]: Start difference. First operand has 59 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 54 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:13,260 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-11-26 11:50:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 11:50:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:13,274 INFO L225 Difference]: With dead ends: 117 [2023-11-26 11:50:13,274 INFO L226 Difference]: Without dead ends: 114 [2023-11-26 11:50:13,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:13,280 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 143 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:13,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 100 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-26 11:50:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2023-11-26 11:50:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-26 11:50:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2023-11-26 11:50:13,337 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 5 [2023-11-26 11:50:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:13,338 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2023-11-26 11:50:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2023-11-26 11:50:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:50:13,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:13,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:50:13,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:50:13,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:13,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 131378569, now seen corresponding path program 1 times [2023-11-26 11:50:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666308251] [2023-11-26 11:50:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,628 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 11:50:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:13,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666308251] [2023-11-26 11:50:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666308251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:13,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579561152] [2023-11-26 11:50:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:13,633 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:13,839 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2023-11-26 11:50:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 11:50:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:13,843 INFO L225 Difference]: With dead ends: 211 [2023-11-26 11:50:13,844 INFO L226 Difference]: Without dead ends: 211 [2023-11-26 11:50:13,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:13,846 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 136 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:13,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 197 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-26 11:50:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2023-11-26 11:50:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 143 states have internal predecessors, (210), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-26 11:50:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 246 transitions. [2023-11-26 11:50:13,874 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 246 transitions. Word has length 5 [2023-11-26 11:50:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:13,874 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 246 transitions. [2023-11-26 11:50:13,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 246 transitions. [2023-11-26 11:50:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-26 11:50:13,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:13,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-26 11:50:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:50:13,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:13,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -222231707, now seen corresponding path program 1 times [2023-11-26 11:50:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:13,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20090695] [2023-11-26 11:50:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,097 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 11:50:14,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20090695] [2023-11-26 11:50:14,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20090695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:14,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:14,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:14,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550651231] [2023-11-26 11:50:14,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:14,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:14,108 INFO L87 Difference]: Start difference. First operand 160 states and 246 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 11:50:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:14,327 INFO L93 Difference]: Finished difference Result 237 states and 340 transitions. [2023-11-26 11:50:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2023-11-26 11:50:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:14,333 INFO L225 Difference]: With dead ends: 237 [2023-11-26 11:50:14,333 INFO L226 Difference]: Without dead ends: 237 [2023-11-26 11:50:14,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:14,335 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:14,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 161 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-26 11:50:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2023-11-26 11:50:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6511627906976745) internal successors, (213), 146 states have internal predecessors, (213), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-26 11:50:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 249 transitions. [2023-11-26 11:50:14,374 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 249 transitions. Word has length 6 [2023-11-26 11:50:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:14,374 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 249 transitions. [2023-11-26 11:50:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 11:50:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 249 transitions. [2023-11-26 11:50:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:50:14,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:14,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:14,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:50:14,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:14,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1700751720, now seen corresponding path program 1 times [2023-11-26 11:50:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:14,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823188774] [2023-11-26 11:50:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:14,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823188774] [2023-11-26 11:50:14,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823188774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:14,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:14,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479895925] [2023-11-26 11:50:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:14,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:14,691 INFO L87 Difference]: Start difference. First operand 163 states and 249 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:14,853 INFO L93 Difference]: Finished difference Result 213 states and 284 transitions. [2023-11-26 11:50:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2023-11-26 11:50:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:14,857 INFO L225 Difference]: With dead ends: 213 [2023-11-26 11:50:14,857 INFO L226 Difference]: Without dead ends: 213 [2023-11-26 11:50:14,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:14,859 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:14,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 192 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-26 11:50:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 163. [2023-11-26 11:50:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6356589147286822) internal successors, (211), 146 states have internal predecessors, (211), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-26 11:50:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 247 transitions. [2023-11-26 11:50:14,876 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 247 transitions. Word has length 7 [2023-11-26 11:50:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 247 transitions. [2023-11-26 11:50:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 11:50:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 247 transitions. [2023-11-26 11:50:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-26 11:50:14,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:14,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:50:14,878 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:14,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1183695815, now seen corresponding path program 1 times [2023-11-26 11:50:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461481102] [2023-11-26 11:50:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,965 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 11:50:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461481102] [2023-11-26 11:50:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461481102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:14,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2877587] [2023-11-26 11:50:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:14,968 INFO L87 Difference]: Start difference. First operand 163 states and 247 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11:50:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:15,077 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2023-11-26 11:50:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-11-26 11:50:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:15,080 INFO L225 Difference]: With dead ends: 245 [2023-11-26 11:50:15,080 INFO L226 Difference]: Without dead ends: 245 [2023-11-26 11:50:15,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:15,082 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:15,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 174 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-26 11:50:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2023-11-26 11:50:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.60625) internal successors, (257), 178 states have internal predecessors, (257), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-26 11:50:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 293 transitions. [2023-11-26 11:50:15,099 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 293 transitions. Word has length 8 [2023-11-26 11:50:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:15,099 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 293 transitions. [2023-11-26 11:50:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11:50:15,100 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 293 transitions. [2023-11-26 11:50:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 11:50:15,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:15,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:50:15,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:15,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1960135350, now seen corresponding path program 1 times [2023-11-26 11:50:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:15,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174777759] [2023-11-26 11:50:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:15,238 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 11:50:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174777759] [2023-11-26 11:50:15,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174777759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:15,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:15,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702005218] [2023-11-26 11:50:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:15,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:15,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:15,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:15,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:15,241 INFO L87 Difference]: Start difference. First operand 196 states and 293 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11:50:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:15,341 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2023-11-26 11:50:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2023-11-26 11:50:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:15,344 INFO L225 Difference]: With dead ends: 244 [2023-11-26 11:50:15,344 INFO L226 Difference]: Without dead ends: 244 [2023-11-26 11:50:15,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:15,346 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 183 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:15,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 193 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-26 11:50:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2023-11-26 11:50:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 173 states have (on average 1.606936416184971) internal successors, (278), 192 states have internal predecessors, (278), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-26 11:50:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 314 transitions. [2023-11-26 11:50:15,359 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 314 transitions. Word has length 9 [2023-11-26 11:50:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:15,359 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 314 transitions. [2023-11-26 11:50:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11:50:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 314 transitions. [2023-11-26 11:50:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 11:50:15,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:15,360 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:15,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:50:15,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:15,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -519071088, now seen corresponding path program 1 times [2023-11-26 11:50:15,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:15,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299420593] [2023-11-26 11:50:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:15,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:15,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:15,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299420593] [2023-11-26 11:50:15,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299420593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:15,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17589433] [2023-11-26 11:50:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:15,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:15,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:15,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:15,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:15,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:50:15,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:15,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17589433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:16,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:16,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-26 11:50:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545158734] [2023-11-26 11:50:16,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:16,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:50:16,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:16,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:50:16,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:16,005 INFO L87 Difference]: Start difference. First operand 210 states and 314 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:16,277 INFO L93 Difference]: Finished difference Result 278 states and 373 transitions. [2023-11-26 11:50:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-26 11:50:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:16,281 INFO L225 Difference]: With dead ends: 278 [2023-11-26 11:50:16,281 INFO L226 Difference]: Without dead ends: 278 [2023-11-26 11:50:16,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:50:16,282 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 384 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:16,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 431 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-26 11:50:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 215. [2023-11-26 11:50:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 197 states have internal predecessors, (273), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2023-11-26 11:50:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 310 transitions. [2023-11-26 11:50:16,303 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 310 transitions. Word has length 13 [2023-11-26 11:50:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:16,303 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 310 transitions. [2023-11-26 11:50:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 310 transitions. [2023-11-26 11:50:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-26 11:50:16,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:16,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:16,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:16,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:16,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:16,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1088665406, now seen corresponding path program 1 times [2023-11-26 11:50:16,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:16,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040832697] [2023-11-26 11:50:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040832697] [2023-11-26 11:50:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040832697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044179938] [2023-11-26 11:50:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:16,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:16,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:16,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:50:16,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044179938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:17,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:17,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-11-26 11:50:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327534708] [2023-11-26 11:50:17,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:50:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:50:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:50:17,098 INFO L87 Difference]: Start difference. First operand 215 states and 310 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:17,462 INFO L93 Difference]: Finished difference Result 307 states and 427 transitions. [2023-11-26 11:50:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:50:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-26 11:50:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:17,465 INFO L225 Difference]: With dead ends: 307 [2023-11-26 11:50:17,465 INFO L226 Difference]: Without dead ends: 307 [2023-11-26 11:50:17,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:50:17,467 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 107 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:17,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 433 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:17,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-26 11:50:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 225. [2023-11-26 11:50:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 186 states have (on average 1.532258064516129) internal successors, (285), 207 states have internal predecessors, (285), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2023-11-26 11:50:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 324 transitions. [2023-11-26 11:50:17,480 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 324 transitions. Word has length 14 [2023-11-26 11:50:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:17,481 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 324 transitions. [2023-11-26 11:50:17,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 324 transitions. [2023-11-26 11:50:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 11:50:17,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:17,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:17,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:17,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:17,689 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:17,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash -611110737, now seen corresponding path program 1 times [2023-11-26 11:50:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:17,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050833558] [2023-11-26 11:50:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:17,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:17,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050833558] [2023-11-26 11:50:17,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050833558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:17,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076772496] [2023-11-26 11:50:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:17,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:17,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:18,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:50:18,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:18,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076772496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:18,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-26 11:50:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270195176] [2023-11-26 11:50:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:50:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:50:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:50:18,441 INFO L87 Difference]: Start difference. First operand 225 states and 324 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:19,437 INFO L93 Difference]: Finished difference Result 482 states and 629 transitions. [2023-11-26 11:50:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:50:19,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-26 11:50:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:19,442 INFO L225 Difference]: With dead ends: 482 [2023-11-26 11:50:19,442 INFO L226 Difference]: Without dead ends: 482 [2023-11-26 11:50:19,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:50:19,443 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 503 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:19,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 886 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:50:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-26 11:50:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 296. [2023-11-26 11:50:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 253 states have (on average 1.5533596837944663) internal successors, (393), 276 states have internal predecessors, (393), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-26 11:50:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 435 transitions. [2023-11-26 11:50:19,460 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 435 transitions. Word has length 15 [2023-11-26 11:50:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 435 transitions. [2023-11-26 11:50:19,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 435 transitions. [2023-11-26 11:50:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 11:50:19,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:19,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:19,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:50:19,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:19,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash -905176023, now seen corresponding path program 1 times [2023-11-26 11:50:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334303498] [2023-11-26 11:50:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334303498] [2023-11-26 11:50:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334303498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:19,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:19,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:50:19,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967812242] [2023-11-26 11:50:19,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:19,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:19,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,731 INFO L87 Difference]: Start difference. First operand 296 states and 435 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 11:50:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:19,762 INFO L93 Difference]: Finished difference Result 436 states and 645 transitions. [2023-11-26 11:50:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 16 [2023-11-26 11:50:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:19,769 INFO L225 Difference]: With dead ends: 436 [2023-11-26 11:50:19,769 INFO L226 Difference]: Without dead ends: 436 [2023-11-26 11:50:19,769 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 11:50:19,770 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:19,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 99 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-26 11:50:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 419. [2023-11-26 11:50:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 365 states have (on average 1.558904109589041) internal successors, (569), 392 states have internal predecessors, (569), 15 states have call successors, (15), 11 states have call predecessors, (15), 21 states have return successors, (53), 15 states have call predecessors, (53), 15 states have call successors, (53) [2023-11-26 11:50:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 637 transitions. [2023-11-26 11:50:19,796 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 637 transitions. Word has length 16 [2023-11-26 11:50:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:19,797 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 637 transitions. [2023-11-26 11:50:19,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 11:50:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 637 transitions. [2023-11-26 11:50:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 11:50:19,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:19,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:50:19,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:19,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -905175767, now seen corresponding path program 1 times [2023-11-26 11:50:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971819683] [2023-11-26 11:50:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:19,834 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 11:50:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:19,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971819683] [2023-11-26 11:50:19,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971819683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:19,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:19,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284675731] [2023-11-26 11:50:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:19,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:19,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,838 INFO L87 Difference]: Start difference. First operand 419 states and 637 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 11:50:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:19,854 INFO L93 Difference]: Finished difference Result 381 states and 571 transitions. [2023-11-26 11:50:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16 [2023-11-26 11:50:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:19,858 INFO L225 Difference]: With dead ends: 381 [2023-11-26 11:50:19,858 INFO L226 Difference]: Without dead ends: 381 [2023-11-26 11:50:19,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,860 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:19,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 88 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-26 11:50:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2023-11-26 11:50:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 333 states have (on average 1.5105105105105106) internal successors, (503), 354 states have internal predecessors, (503), 15 states have call successors, (15), 11 states have call predecessors, (15), 21 states have return successors, (53), 15 states have call predecessors, (53), 15 states have call successors, (53) [2023-11-26 11:50:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 571 transitions. [2023-11-26 11:50:19,881 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 571 transitions. Word has length 16 [2023-11-26 11:50:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:19,882 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 571 transitions. [2023-11-26 11:50:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 11:50:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 571 transitions. [2023-11-26 11:50:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:50:19,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:19,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:50:19,884 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:19,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2004314431, now seen corresponding path program 1 times [2023-11-26 11:50:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:19,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877256079] [2023-11-26 11:50:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:19,976 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 11:50:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:19,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877256079] [2023-11-26 11:50:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877256079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:19,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:50:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113409673] [2023-11-26 11:50:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:19,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:19,979 INFO L87 Difference]: Start difference. First operand 381 states and 571 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 11:50:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:20,016 INFO L93 Difference]: Finished difference Result 447 states and 651 transitions. [2023-11-26 11:50:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 17 [2023-11-26 11:50:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:20,020 INFO L225 Difference]: With dead ends: 447 [2023-11-26 11:50:20,021 INFO L226 Difference]: Without dead ends: 447 [2023-11-26 11:50:20,021 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 11:50:20,022 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 31 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-26 11:50:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 427. [2023-11-26 11:50:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 376 states have (on average 1.5079787234042554) internal successors, (567), 398 states have internal predecessors, (567), 16 states have call successors, (16), 12 states have call predecessors, (16), 23 states have return successors, (55), 16 states have call predecessors, (55), 16 states have call successors, (55) [2023-11-26 11:50:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 638 transitions. [2023-11-26 11:50:20,042 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 638 transitions. Word has length 17 [2023-11-26 11:50:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:20,043 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 638 transitions. [2023-11-26 11:50:20,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 11:50:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 638 transitions. [2023-11-26 11:50:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:50:20,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:20,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:20,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:50:20,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:20,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1348043702, now seen corresponding path program 1 times [2023-11-26 11:50:20,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617497448] [2023-11-26 11:50:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617497448] [2023-11-26 11:50:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617497448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:20,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:20,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:20,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861490350] [2023-11-26 11:50:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:20,105 INFO L87 Difference]: Start difference. First operand 427 states and 638 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:20,184 INFO L93 Difference]: Finished difference Result 297 states and 424 transitions. [2023-11-26 11:50:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-11-26 11:50:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:20,188 INFO L225 Difference]: With dead ends: 297 [2023-11-26 11:50:20,188 INFO L226 Difference]: Without dead ends: 297 [2023-11-26 11:50:20,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 11:50:20,189 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:20,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-26 11:50:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2023-11-26 11:50:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 256 states have (on average 1.4765625) internal successors, (378), 274 states have internal predecessors, (378), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 11:50:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2023-11-26 11:50:20,202 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 23 [2023-11-26 11:50:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:20,202 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2023-11-26 11:50:20,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2023-11-26 11:50:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:50:20,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:20,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:20,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:50:20,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:20,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash -780593392, now seen corresponding path program 1 times [2023-11-26 11:50:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951222171] [2023-11-26 11:50:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951222171] [2023-11-26 11:50:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951222171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:20,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481918472] [2023-11-26 11:50:20,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:20,369 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:20,598 INFO L93 Difference]: Finished difference Result 313 states and 435 transitions. [2023-11-26 11:50:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:50:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-26 11:50:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:20,601 INFO L225 Difference]: With dead ends: 313 [2023-11-26 11:50:20,602 INFO L226 Difference]: Without dead ends: 313 [2023-11-26 11:50:20,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:50:20,603 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:20,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 127 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-26 11:50:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 294. [2023-11-26 11:50:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 256 states have (on average 1.46484375) internal successors, (375), 274 states have internal predecessors, (375), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 11:50:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 418 transitions. [2023-11-26 11:50:20,618 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 418 transitions. Word has length 25 [2023-11-26 11:50:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:20,618 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 418 transitions. [2023-11-26 11:50:20,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 418 transitions. [2023-11-26 11:50:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:50:20,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:20,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:20,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:50:20,622 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:20,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1173620402, now seen corresponding path program 1 times [2023-11-26 11:50:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539802303] [2023-11-26 11:50:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:20,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:20,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539802303] [2023-11-26 11:50:20,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539802303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:20,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653406228] [2023-11-26 11:50:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:20,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:20,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:21,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:50:21,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:21,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:21,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653406228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:21,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:21,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2023-11-26 11:50:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966253026] [2023-11-26 11:50:21,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:50:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:50:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:50:21,699 INFO L87 Difference]: Start difference. First operand 294 states and 418 transitions. Second operand has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:22,378 INFO L93 Difference]: Finished difference Result 389 states and 523 transitions. [2023-11-26 11:50:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:50:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-26 11:50:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:22,384 INFO L225 Difference]: With dead ends: 389 [2023-11-26 11:50:22,384 INFO L226 Difference]: Without dead ends: 389 [2023-11-26 11:50:22,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:50:22,385 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 493 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:22,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 85 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-26 11:50:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 298. [2023-11-26 11:50:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 260 states have (on average 1.4192307692307693) internal successors, (369), 278 states have internal predecessors, (369), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 11:50:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 412 transitions. [2023-11-26 11:50:22,403 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 412 transitions. Word has length 25 [2023-11-26 11:50:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:22,403 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 412 transitions. [2023-11-26 11:50:22,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 412 transitions. [2023-11-26 11:50:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:50:22,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:22,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:22,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:22,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:50:22,615 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:22,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash -177446873, now seen corresponding path program 1 times [2023-11-26 11:50:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:22,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033774873] [2023-11-26 11:50:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:22,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:22,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033774873] [2023-11-26 11:50:22,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033774873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:22,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406626418] [2023-11-26 11:50:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:22,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:22,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:22,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:22,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:50:22,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:23,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406626418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:23,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:23,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-26 11:50:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154777345] [2023-11-26 11:50:23,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:23,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:23,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:23,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:50:23,068 INFO L87 Difference]: Start difference. First operand 298 states and 412 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:23,151 INFO L93 Difference]: Finished difference Result 347 states and 465 transitions. [2023-11-26 11:50:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-26 11:50:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:23,154 INFO L225 Difference]: With dead ends: 347 [2023-11-26 11:50:23,154 INFO L226 Difference]: Without dead ends: 347 [2023-11-26 11:50:23,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:23,156 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:23,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 102 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-26 11:50:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 304. [2023-11-26 11:50:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 266 states have (on average 1.4097744360902256) internal successors, (375), 284 states have internal predecessors, (375), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 11:50:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 418 transitions. [2023-11-26 11:50:23,171 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 418 transitions. Word has length 26 [2023-11-26 11:50:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:23,173 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 418 transitions. [2023-11-26 11:50:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 418 transitions. [2023-11-26 11:50:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:50:23,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:23,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:23,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:50:23,389 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:23,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1727191021, now seen corresponding path program 1 times [2023-11-26 11:50:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:23,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794633216] [2023-11-26 11:50:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:23,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794633216] [2023-11-26 11:50:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794633216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676745037] [2023-11-26 11:50:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:24,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:24,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:24,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:50:24,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:24,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:24,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:24,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:25,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676745037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:25,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:25,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-26 11:50:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688986883] [2023-11-26 11:50:25,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:25,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:50:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:50:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:50:25,069 INFO L87 Difference]: Start difference. First operand 304 states and 418 transitions. Second operand has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:25,882 INFO L93 Difference]: Finished difference Result 348 states and 461 transitions. [2023-11-26 11:50:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:50:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-26 11:50:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:25,886 INFO L225 Difference]: With dead ends: 348 [2023-11-26 11:50:25,886 INFO L226 Difference]: Without dead ends: 348 [2023-11-26 11:50:25,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:50:25,887 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 341 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:25,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 141 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-26 11:50:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 305. [2023-11-26 11:50:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 267 states have (on average 1.3895131086142323) internal successors, (371), 285 states have internal predecessors, (371), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 11:50:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 414 transitions. [2023-11-26 11:50:25,902 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 414 transitions. Word has length 27 [2023-11-26 11:50:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:25,902 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 414 transitions. [2023-11-26 11:50:25,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 414 transitions. [2023-11-26 11:50:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:50:25,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:25,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:25,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:26,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:50:26,110 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:26,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2003314146, now seen corresponding path program 1 times [2023-11-26 11:50:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:26,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701972993] [2023-11-26 11:50:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:26,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701972993] [2023-11-26 11:50:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701972993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:26,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489252882] [2023-11-26 11:50:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:26,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:26,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:50:26,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:26,626 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:50:26,627 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 11:50:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:26,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489252882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:26,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-26 11:50:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85183639] [2023-11-26 11:50:26,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:50:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:50:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:26,742 INFO L87 Difference]: Start difference. First operand 305 states and 414 transitions. Second operand has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:50:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:27,353 INFO L93 Difference]: Finished difference Result 419 states and 527 transitions. [2023-11-26 11:50:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:50:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-26 11:50:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:27,359 INFO L225 Difference]: With dead ends: 419 [2023-11-26 11:50:27,360 INFO L226 Difference]: Without dead ends: 419 [2023-11-26 11:50:27,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:50:27,361 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:27,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 168 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-26 11:50:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 378. [2023-11-26 11:50:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 337 states have (on average 1.3560830860534125) internal successors, (457), 356 states have internal predecessors, (457), 11 states have call successors, (11), 10 states have call predecessors, (11), 18 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-26 11:50:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 499 transitions. [2023-11-26 11:50:27,377 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 499 transitions. Word has length 28 [2023-11-26 11:50:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:27,377 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 499 transitions. [2023-11-26 11:50:27,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.9) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:50:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 499 transitions. [2023-11-26 11:50:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:50:27,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:27,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:27,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:50:27,585 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:27,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1973196431, now seen corresponding path program 1 times [2023-11-26 11:50:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:27,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293758260] [2023-11-26 11:50:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:27,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293758260] [2023-11-26 11:50:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293758260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496371102] [2023-11-26 11:50:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:27,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:27,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:27,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:28,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:50:28,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:28,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:28,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:28,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:28,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496371102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:28,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:28,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2023-11-26 11:50:28,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835251922] [2023-11-26 11:50:28,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:28,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:50:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:50:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:50:28,405 INFO L87 Difference]: Start difference. First operand 378 states and 499 transitions. Second operand has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:29,194 INFO L93 Difference]: Finished difference Result 507 states and 621 transitions. [2023-11-26 11:50:29,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:50:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-26 11:50:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:29,198 INFO L225 Difference]: With dead ends: 507 [2023-11-26 11:50:29,198 INFO L226 Difference]: Without dead ends: 507 [2023-11-26 11:50:29,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 11:50:29,199 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 500 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:29,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 180 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-26 11:50:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 463. [2023-11-26 11:50:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 419 states have (on average 1.334128878281623) internal successors, (559), 440 states have internal predecessors, (559), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-26 11:50:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 597 transitions. [2023-11-26 11:50:29,217 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 597 transitions. Word has length 29 [2023-11-26 11:50:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:29,217 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 597 transitions. [2023-11-26 11:50:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 597 transitions. [2023-11-26 11:50:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 11:50:29,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:29,219 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:29,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:29,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,425 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:29,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1854582443, now seen corresponding path program 1 times [2023-11-26 11:50:29,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:29,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073900498] [2023-11-26 11:50:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:29,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073900498] [2023-11-26 11:50:29,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073900498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:29,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963268512] [2023-11-26 11:50:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:29,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:29,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:29,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:29,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:50:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:29,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:50:29,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:30,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963268512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:30,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2023-11-26 11:50:30,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033986449] [2023-11-26 11:50:30,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:30,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:50:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:30,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:50:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:50:30,636 INFO L87 Difference]: Start difference. First operand 463 states and 597 transitions. Second operand has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:31,456 INFO L93 Difference]: Finished difference Result 547 states and 665 transitions. [2023-11-26 11:50:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:50:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2023-11-26 11:50:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:31,460 INFO L225 Difference]: With dead ends: 547 [2023-11-26 11:50:31,460 INFO L226 Difference]: Without dead ends: 547 [2023-11-26 11:50:31,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:50:31,461 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 481 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:31,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 125 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:50:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-26 11:50:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 460. [2023-11-26 11:50:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 419 states have (on average 1.2840095465393795) internal successors, (538), 437 states have internal predecessors, (538), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-26 11:50:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 576 transitions. [2023-11-26 11:50:31,480 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 576 transitions. Word has length 33 [2023-11-26 11:50:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:31,480 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 576 transitions. [2023-11-26 11:50:31,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 576 transitions. [2023-11-26 11:50:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:50:31,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:31,482 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:31,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:31,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:31,688 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:31,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2145365376, now seen corresponding path program 1 times [2023-11-26 11:50:31,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:31,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640773223] [2023-11-26 11:50:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640773223] [2023-11-26 11:50:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640773223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174120485] [2023-11-26 11:50:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:31,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:31,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:31,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:50:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:32,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:50:32,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:32,232 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:50:32,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-26 11:50:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:32,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:32,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-26 11:50:32,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-26 11:50:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174120485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:32,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:32,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-26 11:50:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72234388] [2023-11-26 11:50:32,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:32,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:50:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:50:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:50:32,566 INFO L87 Difference]: Start difference. First operand 460 states and 576 transitions. Second operand has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:50:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:33,112 INFO L93 Difference]: Finished difference Result 499 states and 602 transitions. [2023-11-26 11:50:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:50:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2023-11-26 11:50:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:33,116 INFO L225 Difference]: With dead ends: 499 [2023-11-26 11:50:33,116 INFO L226 Difference]: Without dead ends: 499 [2023-11-26 11:50:33,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:50:33,117 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 253 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:33,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 161 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-26 11:50:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 463. [2023-11-26 11:50:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 422 states have (on average 1.2819905213270142) internal successors, (541), 440 states have internal predecessors, (541), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2023-11-26 11:50:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 578 transitions. [2023-11-26 11:50:33,133 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 578 transitions. Word has length 34 [2023-11-26 11:50:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:33,133 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 578 transitions. [2023-11-26 11:50:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:50:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 578 transitions. [2023-11-26 11:50:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-26 11:50:33,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:33,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:33,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-26 11:50:33,348 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:33,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:33,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2081817197, now seen corresponding path program 1 times [2023-11-26 11:50:33,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:33,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648127829] [2023-11-26 11:50:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:33,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:34,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648127829] [2023-11-26 11:50:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648127829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:34,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911565190] [2023-11-26 11:50:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:34,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:34,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:34,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:50:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:50:34,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:34,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:34,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:34,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911565190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:34,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:34,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-26 11:50:34,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043820250] [2023-11-26 11:50:34,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:34,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:50:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:50:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:50:34,778 INFO L87 Difference]: Start difference. First operand 463 states and 578 transitions. Second operand has 19 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:35,898 INFO L93 Difference]: Finished difference Result 566 states and 667 transitions. [2023-11-26 11:50:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:50:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-11-26 11:50:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:35,905 INFO L225 Difference]: With dead ends: 566 [2023-11-26 11:50:35,905 INFO L226 Difference]: Without dead ends: 566 [2023-11-26 11:50:35,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=1222, Unknown=0, NotChecked=0, Total=1560 [2023-11-26 11:50:35,907 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 604 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:35,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 196 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:50:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-26 11:50:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 428. [2023-11-26 11:50:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 389 states have (on average 1.275064267352185) internal successors, (496), 407 states have internal predecessors, (496), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-11-26 11:50:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 530 transitions. [2023-11-26 11:50:35,927 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 530 transitions. Word has length 35 [2023-11-26 11:50:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 530 transitions. [2023-11-26 11:50:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 530 transitions. [2023-11-26 11:50:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 11:50:35,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:35,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:35,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:36,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-26 11:50:36,135 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:36,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:36,135 INFO L85 PathProgramCache]: Analyzing trace with hash -828432177, now seen corresponding path program 1 times [2023-11-26 11:50:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:36,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593230305] [2023-11-26 11:50:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:36,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:36,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593230305] [2023-11-26 11:50:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593230305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602740359] [2023-11-26 11:50:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:36,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:36,369 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:36,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:50:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:36,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:50:36,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:36,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:36,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602740359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:36,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-26 11:50:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236716318] [2023-11-26 11:50:36,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:36,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:50:36,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:50:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:50:36,965 INFO L87 Difference]: Start difference. First operand 428 states and 530 transitions. Second operand has 16 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:50:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:37,720 INFO L93 Difference]: Finished difference Result 465 states and 549 transitions. [2023-11-26 11:50:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:50:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-26 11:50:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:37,723 INFO L225 Difference]: With dead ends: 465 [2023-11-26 11:50:37,724 INFO L226 Difference]: Without dead ends: 465 [2023-11-26 11:50:37,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=933, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 11:50:37,725 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 474 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:37,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 177 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-26 11:50:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 428. [2023-11-26 11:50:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 389 states have (on average 1.2724935732647815) internal successors, (495), 407 states have internal predecessors, (495), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-11-26 11:50:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 529 transitions. [2023-11-26 11:50:37,744 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 529 transitions. Word has length 37 [2023-11-26 11:50:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:37,745 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 529 transitions. [2023-11-26 11:50:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:50:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 529 transitions. [2023-11-26 11:50:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 11:50:37,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:37,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:37,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:50:37,956 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 49098310, now seen corresponding path program 2 times [2023-11-26 11:50:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880973157] [2023-11-26 11:50:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:38,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880973157] [2023-11-26 11:50:38,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880973157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217653524] [2023-11-26 11:50:38,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:38,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:38,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:38,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:38,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:50:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:38,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-26 11:50:38,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:38,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:38,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:39,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217653524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:39,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2023-11-26 11:50:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116369325] [2023-11-26 11:50:39,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:50:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:50:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:50:39,089 INFO L87 Difference]: Start difference. First operand 428 states and 529 transitions. Second operand has 17 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:40,256 INFO L93 Difference]: Finished difference Result 518 states and 608 transitions. [2023-11-26 11:50:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 11:50:40,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-11-26 11:50:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:40,259 INFO L225 Difference]: With dead ends: 518 [2023-11-26 11:50:40,259 INFO L226 Difference]: Without dead ends: 518 [2023-11-26 11:50:40,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 11:50:40,261 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 354 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:40,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 240 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:50:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-11-26 11:50:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2023-11-26 11:50:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 354 states have (on average 1.2627118644067796) internal successors, (447), 371 states have internal predecessors, (447), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 11:50:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 477 transitions. [2023-11-26 11:50:40,289 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 477 transitions. Word has length 43 [2023-11-26 11:50:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:40,289 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 477 transitions. [2023-11-26 11:50:40,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 11:50:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 477 transitions. [2023-11-26 11:50:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 11:50:40,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:40,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:40,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:40,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 11:50:40,497 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:40,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:40,497 INFO L85 PathProgramCache]: Analyzing trace with hash 558007675, now seen corresponding path program 1 times [2023-11-26 11:50:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:40,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393419462] [2023-11-26 11:50:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393419462] [2023-11-26 11:50:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393419462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424808841] [2023-11-26 11:50:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:40,601 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:40,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:50:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:50:40,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:40,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:40,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424808841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:40,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:40,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-26 11:50:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133107758] [2023-11-26 11:50:40,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:40,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:40,743 INFO L87 Difference]: Start difference. First operand 390 states and 477 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:40,771 INFO L93 Difference]: Finished difference Result 444 states and 520 transitions. [2023-11-26 11:50:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-26 11:50:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:40,774 INFO L225 Difference]: With dead ends: 444 [2023-11-26 11:50:40,774 INFO L226 Difference]: Without dead ends: 444 [2023-11-26 11:50:40,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:40,775 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:40,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-26 11:50:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 378. [2023-11-26 11:50:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 342 states have (on average 1.2309941520467835) internal successors, (421), 359 states have internal predecessors, (421), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 11:50:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 451 transitions. [2023-11-26 11:50:40,788 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 451 transitions. Word has length 43 [2023-11-26 11:50:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:40,788 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 451 transitions. [2023-11-26 11:50:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 451 transitions. [2023-11-26 11:50:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 11:50:40,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:40,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:40,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-26 11:50:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 11:50:40,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:40,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash 977756381, now seen corresponding path program 1 times [2023-11-26 11:50:40,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:40,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538733201] [2023-11-26 11:50:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538733201] [2023-11-26 11:50:41,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538733201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:41,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071123670] [2023-11-26 11:50:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:41,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:41,104 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:41,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:50:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:50:41,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:41,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:41,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071123670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-26 11:50:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657518274] [2023-11-26 11:50:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:41,260 INFO L87 Difference]: Start difference. First operand 378 states and 451 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:41,279 INFO L93 Difference]: Finished difference Result 377 states and 448 transitions. [2023-11-26 11:50:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-11-26 11:50:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:41,282 INFO L225 Difference]: With dead ends: 377 [2023-11-26 11:50:41,283 INFO L226 Difference]: Without dead ends: 377 [2023-11-26 11:50:41,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:41,284 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:41,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 74 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-26 11:50:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2023-11-26 11:50:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 342 states have (on average 1.2222222222222223) internal successors, (418), 358 states have internal predecessors, (418), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 11:50:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 448 transitions. [2023-11-26 11:50:41,298 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 448 transitions. Word has length 44 [2023-11-26 11:50:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:41,298 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 448 transitions. [2023-11-26 11:50:41,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 448 transitions. [2023-11-26 11:50:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 11:50:41,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:41,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:41,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:50:41,506 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:41,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 245676811, now seen corresponding path program 1 times [2023-11-26 11:50:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51454549] [2023-11-26 11:50:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:41,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51454549] [2023-11-26 11:50:41,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51454549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840081523] [2023-11-26 11:50:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:41,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:41,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:41,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:50:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:41,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:50:41,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:41,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:41,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840081523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:41,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:41,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-26 11:50:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799573260] [2023-11-26 11:50:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:41,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:41,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:41,839 INFO L87 Difference]: Start difference. First operand 377 states and 448 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:41,879 INFO L93 Difference]: Finished difference Result 376 states and 444 transitions. [2023-11-26 11:50:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-11-26 11:50:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:41,882 INFO L225 Difference]: With dead ends: 376 [2023-11-26 11:50:41,882 INFO L226 Difference]: Without dead ends: 376 [2023-11-26 11:50:41,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:41,883 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:41,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:50:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-26 11:50:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-11-26 11:50:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 342 states have (on average 1.2105263157894737) internal successors, (414), 357 states have internal predecessors, (414), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 11:50:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 444 transitions. [2023-11-26 11:50:41,894 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 444 transitions. Word has length 45 [2023-11-26 11:50:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:41,895 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 444 transitions. [2023-11-26 11:50:41,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 444 transitions. [2023-11-26 11:50:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 11:50:41,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:41,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:41,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:42,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 11:50:42,102 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:42,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash -973953377, now seen corresponding path program 1 times [2023-11-26 11:50:42,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:42,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278130482] [2023-11-26 11:50:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:42,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:42,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278130482] [2023-11-26 11:50:42,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278130482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110868106] [2023-11-26 11:50:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:42,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:42,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:50:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:50:42,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:42,371 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 11:50:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:50:42,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:50:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110868106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:42,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:50:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-26 11:50:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362681714] [2023-11-26 11:50:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:42,421 INFO L87 Difference]: Start difference. First operand 376 states and 444 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:42,493 INFO L93 Difference]: Finished difference Result 389 states and 451 transitions. [2023-11-26 11:50:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-26 11:50:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:42,495 INFO L225 Difference]: With dead ends: 389 [2023-11-26 11:50:42,496 INFO L226 Difference]: Without dead ends: 389 [2023-11-26 11:50:42,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:42,500 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:42,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 112 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:50:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-26 11:50:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2023-11-26 11:50:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 357 states have internal predecessors, (411), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 11:50:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 441 transitions. [2023-11-26 11:50:42,512 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 441 transitions. Word has length 46 [2023-11-26 11:50:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:42,512 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 441 transitions. [2023-11-26 11:50:42,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:50:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 441 transitions. [2023-11-26 11:50:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 11:50:42,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:42,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:42,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:50:42,720 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:42,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -169332805, now seen corresponding path program 1 times [2023-11-26 11:50:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757933084] [2023-11-26 11:50:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:42,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:50:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:50:43,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:43,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757933084] [2023-11-26 11:50:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757933084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134736225] [2023-11-26 11:50:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:43,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:43,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:43,059 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:43,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:50:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:43,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:50:43,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:43,268 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:50:43,268 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 11:50:43,339 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:50:43,340 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 11:50:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 11:50:43,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:43,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134736225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:43,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:43,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-26 11:50:43,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947897503] [2023-11-26 11:50:43,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:50:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:50:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:43,451 INFO L87 Difference]: Start difference. First operand 376 states and 441 transitions. Second operand has 12 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:43,946 INFO L93 Difference]: Finished difference Result 444 states and 512 transitions. [2023-11-26 11:50:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:50:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-11-26 11:50:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:43,949 INFO L225 Difference]: With dead ends: 444 [2023-11-26 11:50:43,949 INFO L226 Difference]: Without dead ends: 444 [2023-11-26 11:50:43,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:50:43,950 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 212 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:43,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 168 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:50:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-26 11:50:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 414. [2023-11-26 11:50:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 377 states have (on average 1.1962864721485411) internal successors, (451), 393 states have internal predecessors, (451), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2023-11-26 11:50:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 485 transitions. [2023-11-26 11:50:43,982 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 485 transitions. Word has length 48 [2023-11-26 11:50:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:43,982 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 485 transitions. [2023-11-26 11:50:43,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-26 11:50:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 485 transitions. [2023-11-26 11:50:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-26 11:50:43,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:43,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:43,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:44,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 11:50:44,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:44,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash -954349610, now seen corresponding path program 1 times [2023-11-26 11:50:44,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:44,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826519956] [2023-11-26 11:50:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:50:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826519956] [2023-11-26 11:50:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826519956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991660964] [2023-11-26 11:50:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:44,658 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:44,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:50:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:44,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:50:44,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:44,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:45,003 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:50:45,003 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 11:50:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:50:45,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:50:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:50:45,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:45,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991660964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:45,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:50:45,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2023-11-26 11:50:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923688876] [2023-11-26 11:50:45,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:45,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:50:45,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:50:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:50:45,422 INFO L87 Difference]: Start difference. First operand 414 states and 485 transitions. Second operand has 21 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:50:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:46,605 INFO L93 Difference]: Finished difference Result 446 states and 501 transitions. [2023-11-26 11:50:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:50:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2023-11-26 11:50:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:46,608 INFO L225 Difference]: With dead ends: 446 [2023-11-26 11:50:46,608 INFO L226 Difference]: Without dead ends: 446 [2023-11-26 11:50:46,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2023-11-26 11:50:46,611 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 532 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:46,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 259 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:50:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-26 11:50:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 416. [2023-11-26 11:50:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 381 states have (on average 1.162729658792651) internal successors, (443), 395 states have internal predecessors, (443), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-26 11:50:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 475 transitions. [2023-11-26 11:50:46,625 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 475 transitions. Word has length 49 [2023-11-26 11:50:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:46,625 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 475 transitions. [2023-11-26 11:50:46,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:50:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 475 transitions. [2023-11-26 11:50:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-26 11:50:46,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:46,627 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:46,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:46,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:46,836 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:46,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:46,837 INFO L85 PathProgramCache]: Analyzing trace with hash 139291547, now seen corresponding path program 1 times [2023-11-26 11:50:46,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415041461] [2023-11-26 11:50:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:46,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:50:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:50:47,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:47,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415041461] [2023-11-26 11:50:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415041461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:47,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257433692] [2023-11-26 11:50:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:47,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:47,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:47,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 11:50:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:47,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:50:47,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:47,366 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:50:47,366 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 11:50:47,571 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:50:47,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-26 11:50:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:47,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:47,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-26 11:50:47,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-26 11:50:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:50:48,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257433692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:48,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:48,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2023-11-26 11:50:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759597702] [2023-11-26 11:50:48,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:50:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:48,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:50:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:50:48,023 INFO L87 Difference]: Start difference. First operand 416 states and 475 transitions. Second operand has 23 states, 20 states have (on average 6.45) internal successors, (129), 21 states have internal predecessors, (129), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:50:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:48,299 INFO L93 Difference]: Finished difference Result 433 states and 492 transitions. [2023-11-26 11:50:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 6.45) internal successors, (129), 21 states have internal predecessors, (129), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2023-11-26 11:50:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:48,302 INFO L225 Difference]: With dead ends: 433 [2023-11-26 11:50:48,302 INFO L226 Difference]: Without dead ends: 433 [2023-11-26 11:50:48,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:50:48,304 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 209 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:48,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 80 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:50:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-26 11:50:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 415. [2023-11-26 11:50:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 381 states have (on average 1.1601049868766404) internal successors, (442), 394 states have internal predecessors, (442), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-26 11:50:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 474 transitions. [2023-11-26 11:50:48,317 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 474 transitions. Word has length 54 [2023-11-26 11:50:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:48,318 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 474 transitions. [2023-11-26 11:50:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 6.45) internal successors, (129), 21 states have internal predecessors, (129), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:50:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 474 transitions. [2023-11-26 11:50:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:50:48,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:48,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:48,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:48,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-26 11:50:48,526 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:48,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 23070642, now seen corresponding path program 1 times [2023-11-26 11:50:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:48,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031860523] [2023-11-26 11:50:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:48,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:48,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:49,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:50:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:50:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031860523] [2023-11-26 11:50:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031860523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867704915] [2023-11-26 11:50:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:49,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:49,313 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:49,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-26 11:50:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:49,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 11:50:49,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:49,683 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:50:49,683 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 11:50:50,110 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-26 11:50:50,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-26 11:50:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:50,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:50,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-11-26 11:50:50,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:50:50,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-11-26 11:50:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:50:51,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867704915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:51,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:51,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 39 [2023-11-26 11:50:51,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24787117] [2023-11-26 11:50:51,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:51,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-26 11:50:51,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-26 11:50:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2023-11-26 11:50:51,043 INFO L87 Difference]: Start difference. First operand 415 states and 474 transitions. Second operand has 41 states, 35 states have (on average 3.914285714285714) internal successors, (137), 32 states have internal predecessors, (137), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:50:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:50:52,052 INFO L93 Difference]: Finished difference Result 496 states and 559 transitions. [2023-11-26 11:50:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:50:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 3.914285714285714) internal successors, (137), 32 states have internal predecessors, (137), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-11-26 11:50:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:50:52,055 INFO L225 Difference]: With dead ends: 496 [2023-11-26 11:50:52,055 INFO L226 Difference]: Without dead ends: 496 [2023-11-26 11:50:52,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2023-11-26 11:50:52,057 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 483 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:50:52,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 205 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:50:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-26 11:50:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 415. [2023-11-26 11:50:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 381 states have (on average 1.1574803149606299) internal successors, (441), 394 states have internal predecessors, (441), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2023-11-26 11:50:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 473 transitions. [2023-11-26 11:50:52,070 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 473 transitions. Word has length 55 [2023-11-26 11:50:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:50:52,070 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 473 transitions. [2023-11-26 11:50:52,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 3.914285714285714) internal successors, (137), 32 states have internal predecessors, (137), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:50:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 473 transitions. [2023-11-26 11:50:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:50:52,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:50:52,072 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:52,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:52,279 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-26 11:50:52,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash 861481531, now seen corresponding path program 1 times [2023-11-26 11:50:52,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:52,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640013570] [2023-11-26 11:50:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:52,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:52,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:50:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-26 11:50:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:53,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640013570] [2023-11-26 11:50:53,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640013570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:53,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893431796] [2023-11-26 11:50:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:53,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:53,060 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:53,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_036913cd-9379-4af6-87ef-9695338b945a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-26 11:50:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:53,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 11:50:53,192 INFO L285 TraceCheckSpWp]: Computing forward predicates...