./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_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 21:48:44,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:44,765 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:48:44,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:44,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:44,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:44,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:44,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:44,798 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:44,798 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:44,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:44,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:44,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:44,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:44,802 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:44,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:44,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:44,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:44,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:44,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:44,806 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:48:44,807 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:48:44,807 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:48:44,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:44,808 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:48:44,809 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:48:44,809 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:44,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:44,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:44,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:44,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:44,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:44,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:44,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:44,813 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:44,814 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:44,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:44,815 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:44,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:44,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:44,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:44,817 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_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2023-11-24 21:48:45,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:48:45,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:48:45,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:48:45,167 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:48:45,167 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:48:45,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-24 21:48:48,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:48:48,586 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:48:48,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-24 21:48:48,609 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/data/b2c033e4c/b2beffcd67eb45bbb86efae686f7b4d8/FLAG52ebc0076 [2023-11-24 21:48:48,627 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/data/b2c033e4c/b2beffcd67eb45bbb86efae686f7b4d8 [2023-11-24 21:48:48,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:48:48,640 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:48:48,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:48,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:48:48,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:48:48,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:48" (1/1) ... [2023-11-24 21:48:48,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286ab1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:48, skipping insertion in model container [2023-11-24 21:48:48,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:48" (1/1) ... [2023-11-24 21:48:48,716 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:48:49,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:49,267 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:48:49,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:49,374 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:48:49,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49 WrapperNode [2023-11-24 21:48:49,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:49,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:49,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:48:49,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:48:49,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,432 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2023-11-24 21:48:49,432 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:49,433 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:48:49,433 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:48:49,433 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:48:49,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,449 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,467 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 [9, 6, 6]. The 0 writes are split as follows [0, 0, 0]. [2023-11-24 21:48:49,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:48:49,489 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:48:49,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:48:49,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:48:49,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (1/1) ... [2023-11-24 21:48:49,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:49,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:49,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:48:49,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:48:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:48:49,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:48:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:48:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2023-11-24 21:48:49,571 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2023-11-24 21:48:49,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:48:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:48:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:48:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:48:49,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:48:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:48:49,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:48:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:48:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:48:49,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:48:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:48:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:48:49,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:48:49,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:48:49,715 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:48:49,717 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:48:49,968 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:48:50,025 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:48:50,025 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:48:50,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:50 BoogieIcfgContainer [2023-11-24 21:48:50,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:48:50,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:48:50,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:48:50,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:48:50,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:48:48" (1/3) ... [2023-11-24 21:48:50,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe6ae91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:50, skipping insertion in model container [2023-11-24 21:48:50,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:49" (2/3) ... [2023-11-24 21:48:50,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe6ae91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:50, skipping insertion in model container [2023-11-24 21:48:50,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:50" (3/3) ... [2023-11-24 21:48:50,053 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2023-11-24 21:48:50,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:48:50,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-24 21:48:50,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:48:50,138 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;@5010fe5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:48:50,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-24 21:48:50,142 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) [2023-11-24 21:48:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:48:50,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:50,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:48:50,151 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)] === [2023-11-24 21:48:50,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 131378568, now seen corresponding path program 1 times [2023-11-24 21:48:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:50,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610912233] [2023-11-24 21:48:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610912233] [2023-11-24 21:48:50,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610912233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:50,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:50,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:50,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518460912] [2023-11-24 21:48:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:50,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:50,591 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) [2023-11-24 21:48:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:50,740 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-11-24 21:48:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:50,743 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 [2023-11-24 21:48:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:50,753 INFO L225 Difference]: With dead ends: 117 [2023-11-24 21:48:50,754 INFO L226 Difference]: Without dead ends: 114 [2023-11-24 21:48:50,756 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 [2023-11-24 21:48:50,760 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 [2023-11-24 21:48:50,761 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] [2023-11-24 21:48:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-24 21:48:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2023-11-24 21:48:50,802 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) [2023-11-24 21:48:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2023-11-24 21:48:50,808 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 5 [2023-11-24 21:48:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:50,809 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2023-11-24 21:48:50,809 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) [2023-11-24 21:48:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2023-11-24 21:48:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:48:50,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:50,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:48:50,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:48:50,810 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)] === [2023-11-24 21:48:50,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 131378569, now seen corresponding path program 1 times [2023-11-24 21:48:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195645467] [2023-11-24 21:48:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195645467] [2023-11-24 21:48:51,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195645467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:51,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061595180] [2023-11-24 21:48:51,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:51,154 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) [2023-11-24 21:48:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:51,360 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2023-11-24 21:48:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:51,361 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 [2023-11-24 21:48:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:51,371 INFO L225 Difference]: With dead ends: 211 [2023-11-24 21:48:51,371 INFO L226 Difference]: Without dead ends: 211 [2023-11-24 21:48:51,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:51,375 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:51,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 197 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-24 21:48:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2023-11-24 21:48:51,409 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) [2023-11-24 21:48:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 246 transitions. [2023-11-24 21:48:51,418 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 246 transitions. Word has length 5 [2023-11-24 21:48:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:51,419 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 246 transitions. [2023-11-24 21:48:51,419 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) [2023-11-24 21:48:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 246 transitions. [2023-11-24 21:48:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:48:51,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:51,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:48:51,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:48:51,422 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)] === [2023-11-24 21:48:51,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -222231707, now seen corresponding path program 1 times [2023-11-24 21:48:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527403230] [2023-11-24 21:48:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:51,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527403230] [2023-11-24 21:48:51,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527403230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:51,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59631825] [2023-11-24 21:48:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:51,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:51,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:51,750 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) [2023-11-24 21:48:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:51,942 INFO L93 Difference]: Finished difference Result 237 states and 340 transitions. [2023-11-24 21:48:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:51,943 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 [2023-11-24 21:48:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:51,947 INFO L225 Difference]: With dead ends: 237 [2023-11-24 21:48:51,947 INFO L226 Difference]: Without dead ends: 237 [2023-11-24 21:48:51,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:51,960 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 [2023-11-24 21:48:51,961 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] [2023-11-24 21:48:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-24 21:48:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2023-11-24 21:48:51,998 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) [2023-11-24 21:48:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 249 transitions. [2023-11-24 21:48:52,001 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 249 transitions. Word has length 6 [2023-11-24 21:48:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,002 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 249 transitions. [2023-11-24 21:48:52,002 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) [2023-11-24 21:48:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 249 transitions. [2023-11-24 21:48:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:48:52,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:48:52,004 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)] === [2023-11-24 21:48:52,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1700751720, now seen corresponding path program 1 times [2023-11-24 21:48:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656416510] [2023-11-24 21:48:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656416510] [2023-11-24 21:48:52,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656416510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:52,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45959318] [2023-11-24 21:48:52,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:52,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:52,323 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) [2023-11-24 21:48:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,480 INFO L93 Difference]: Finished difference Result 213 states and 284 transitions. [2023-11-24 21:48:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:52,481 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 [2023-11-24 21:48:52,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:52,484 INFO L225 Difference]: With dead ends: 213 [2023-11-24 21:48:52,484 INFO L226 Difference]: Without dead ends: 213 [2023-11-24 21:48:52,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:52,492 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 [2023-11-24 21:48:52,494 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] [2023-11-24 21:48:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-24 21:48:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 163. [2023-11-24 21:48:52,517 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) [2023-11-24 21:48:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 247 transitions. [2023-11-24 21:48:52,519 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 247 transitions. Word has length 7 [2023-11-24 21:48:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,520 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 247 transitions. [2023-11-24 21:48:52,520 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) [2023-11-24 21:48:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 247 transitions. [2023-11-24 21:48:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:48:52,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:48:52,522 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)] === [2023-11-24 21:48:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1183695815, now seen corresponding path program 1 times [2023-11-24 21:48:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613675539] [2023-11-24 21:48:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613675539] [2023-11-24 21:48:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613675539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:52,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:52,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369221214] [2023-11-24 21:48:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:52,609 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) [2023-11-24 21:48:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,715 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2023-11-24 21:48:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:52,716 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 [2023-11-24 21:48:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:52,720 INFO L225 Difference]: With dead ends: 245 [2023-11-24 21:48:52,721 INFO L226 Difference]: Without dead ends: 245 [2023-11-24 21:48:52,721 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 [2023-11-24 21:48:52,722 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 [2023-11-24 21:48:52,722 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] [2023-11-24 21:48:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-24 21:48:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2023-11-24 21:48:52,742 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) [2023-11-24 21:48:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 293 transitions. [2023-11-24 21:48:52,745 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 293 transitions. Word has length 8 [2023-11-24 21:48:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,746 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 293 transitions. [2023-11-24 21:48:52,746 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) [2023-11-24 21:48:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 293 transitions. [2023-11-24 21:48:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:48:52,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:48:52,747 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)] === [2023-11-24 21:48:52,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1960135350, now seen corresponding path program 1 times [2023-11-24 21:48:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095715061] [2023-11-24 21:48:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095715061] [2023-11-24 21:48:52,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095715061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:52,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:52,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451079520] [2023-11-24 21:48:52,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:52,880 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) [2023-11-24 21:48:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,998 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2023-11-24 21:48:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:53,002 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 [2023-11-24 21:48:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:53,005 INFO L225 Difference]: With dead ends: 244 [2023-11-24 21:48:53,005 INFO L226 Difference]: Without dead ends: 244 [2023-11-24 21:48:53,006 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 [2023-11-24 21:48:53,007 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 [2023-11-24 21:48:53,007 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] [2023-11-24 21:48:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-24 21:48:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2023-11-24 21:48:53,021 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) [2023-11-24 21:48:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 314 transitions. [2023-11-24 21:48:53,025 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 314 transitions. Word has length 9 [2023-11-24 21:48:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:53,026 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 314 transitions. [2023-11-24 21:48:53,026 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) [2023-11-24 21:48:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 314 transitions. [2023-11-24 21:48:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:48:53,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:53,027 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:48:53,027 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)] === [2023-11-24 21:48:53,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -519071088, now seen corresponding path program 1 times [2023-11-24 21:48:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095898881] [2023-11-24 21:48:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:53,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095898881] [2023-11-24 21:48:53,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095898881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186375146] [2023-11-24 21:48:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:53,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:53,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:53,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:53,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:48:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:53,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:48:53,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:53,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186375146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:53,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:53,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-24 21:48:53,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239185028] [2023-11-24 21:48:53,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:53,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:48:53,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:48:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:48:53,730 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) [2023-11-24 21:48:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:54,017 INFO L93 Difference]: Finished difference Result 278 states and 373 transitions. [2023-11-24 21:48:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:48:54,018 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 [2023-11-24 21:48:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:54,023 INFO L225 Difference]: With dead ends: 278 [2023-11-24 21:48:54,023 INFO L226 Difference]: Without dead ends: 278 [2023-11-24 21:48:54,024 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 [2023-11-24 21:48:54,025 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 [2023-11-24 21:48:54,025 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] [2023-11-24 21:48:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-11-24 21:48:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 215. [2023-11-24 21:48:54,041 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) [2023-11-24 21:48:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 310 transitions. [2023-11-24 21:48:54,044 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 310 transitions. Word has length 13 [2023-11-24 21:48:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:54,044 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 310 transitions. [2023-11-24 21:48:54,045 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) [2023-11-24 21:48:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 310 transitions. [2023-11-24 21:48:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:48:54,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:54,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:54,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:54,253 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)] === [2023-11-24 21:48:54,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1088665406, now seen corresponding path program 1 times [2023-11-24 21:48:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:54,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119540943] [2023-11-24 21:48:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:54,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:54,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119540943] [2023-11-24 21:48:54,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119540943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:54,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155889870] [2023-11-24 21:48:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:54,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:54,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:54,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:48:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:54,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:48:54,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:54,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155889870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:54,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-11-24 21:48:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464232428] [2023-11-24 21:48:54,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:54,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:48:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:48:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:48:54,851 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) [2023-11-24 21:48:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:55,249 INFO L93 Difference]: Finished difference Result 307 states and 427 transitions. [2023-11-24 21:48:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:48:55,250 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 [2023-11-24 21:48:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:55,252 INFO L225 Difference]: With dead ends: 307 [2023-11-24 21:48:55,253 INFO L226 Difference]: Without dead ends: 307 [2023-11-24 21:48:55,253 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 [2023-11-24 21:48:55,254 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 107 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-24 21:48:55,254 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] [2023-11-24 21:48:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-24 21:48:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 225. [2023-11-24 21:48:55,263 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) [2023-11-24 21:48:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 324 transitions. [2023-11-24 21:48:55,266 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 324 transitions. Word has length 14 [2023-11-24 21:48:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:55,266 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 324 transitions. [2023-11-24 21:48:55,266 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) [2023-11-24 21:48:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 324 transitions. [2023-11-24 21:48:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:48:55,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:55,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:55,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:55,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 21:48:55,474 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)] === [2023-11-24 21:48:55,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash -611110737, now seen corresponding path program 1 times [2023-11-24 21:48:55,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:55,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231724528] [2023-11-24 21:48:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:55,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231724528] [2023-11-24 21:48:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231724528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602199380] [2023-11-24 21:48:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:55,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:55,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:48:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:55,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:48:55,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:56,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:56,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602199380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:56,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:56,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-24 21:48:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015289041] [2023-11-24 21:48:56,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:56,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:48:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:48:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:48:56,221 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) [2023-11-24 21:48:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:57,123 INFO L93 Difference]: Finished difference Result 482 states and 629 transitions. [2023-11-24 21:48:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:48:57,124 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 [2023-11-24 21:48:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:57,127 INFO L225 Difference]: With dead ends: 482 [2023-11-24 21:48:57,127 INFO L226 Difference]: Without dead ends: 482 [2023-11-24 21:48:57,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:48:57,128 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 503 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:57,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 886 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:48:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-24 21:48:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 296. [2023-11-24 21:48:57,142 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) [2023-11-24 21:48:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 435 transitions. [2023-11-24 21:48:57,145 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 435 transitions. Word has length 15 [2023-11-24 21:48:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:57,145 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 435 transitions. [2023-11-24 21:48:57,145 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) [2023-11-24 21:48:57,146 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 435 transitions. [2023-11-24 21:48:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:48:57,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:57,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:57,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:48:57,353 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)] === [2023-11-24 21:48:57,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash -905176023, now seen corresponding path program 1 times [2023-11-24 21:48:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642705052] [2023-11-24 21:48:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:57,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642705052] [2023-11-24 21:48:57,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642705052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:57,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:57,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:48:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736576171] [2023-11-24 21:48:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:57,423 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) [2023-11-24 21:48:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:57,454 INFO L93 Difference]: Finished difference Result 436 states and 645 transitions. [2023-11-24 21:48:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:57,454 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 [2023-11-24 21:48:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:57,458 INFO L225 Difference]: With dead ends: 436 [2023-11-24 21:48:57,458 INFO L226 Difference]: Without dead ends: 436 [2023-11-24 21:48:57,459 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 [2023-11-24 21:48:57,460 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 [2023-11-24 21:48:57,461 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] [2023-11-24 21:48:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-24 21:48:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 419. [2023-11-24 21:48:57,476 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) [2023-11-24 21:48:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 637 transitions. [2023-11-24 21:48:57,480 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 637 transitions. Word has length 16 [2023-11-24 21:48:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:57,480 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 637 transitions. [2023-11-24 21:48:57,481 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) [2023-11-24 21:48:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 637 transitions. [2023-11-24 21:48:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:48:57,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:57,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:57,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:48:57,482 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)] === [2023-11-24 21:48:57,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash -905175767, now seen corresponding path program 1 times [2023-11-24 21:48:57,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264550171] [2023-11-24 21:48:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264550171] [2023-11-24 21:48:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264550171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:57,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:57,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203173709] [2023-11-24 21:48:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:57,528 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) [2023-11-24 21:48:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:57,549 INFO L93 Difference]: Finished difference Result 381 states and 571 transitions. [2023-11-24 21:48:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:57,550 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 [2023-11-24 21:48:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:57,553 INFO L225 Difference]: With dead ends: 381 [2023-11-24 21:48:57,553 INFO L226 Difference]: Without dead ends: 381 [2023-11-24 21:48:57,553 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 [2023-11-24 21:48:57,554 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 [2023-11-24 21:48:57,555 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] [2023-11-24 21:48:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-11-24 21:48:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2023-11-24 21:48:57,569 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) [2023-11-24 21:48:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 571 transitions. [2023-11-24 21:48:57,573 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 571 transitions. Word has length 16 [2023-11-24 21:48:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:57,574 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 571 transitions. [2023-11-24 21:48:57,574 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) [2023-11-24 21:48:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 571 transitions. [2023-11-24 21:48:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:48:57,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:57,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:48:57,575 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)] === [2023-11-24 21:48:57,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2004314431, now seen corresponding path program 1 times [2023-11-24 21:48:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727271489] [2023-11-24 21:48:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:57,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727271489] [2023-11-24 21:48:57,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727271489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:57,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:57,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:48:57,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324092467] [2023-11-24 21:48:57,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:57,685 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) [2023-11-24 21:48:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:57,722 INFO L93 Difference]: Finished difference Result 447 states and 651 transitions. [2023-11-24 21:48:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:57,722 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 [2023-11-24 21:48:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:57,725 INFO L225 Difference]: With dead ends: 447 [2023-11-24 21:48:57,725 INFO L226 Difference]: Without dead ends: 447 [2023-11-24 21:48:57,726 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 [2023-11-24 21:48:57,726 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 [2023-11-24 21:48:57,727 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] [2023-11-24 21:48:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-24 21:48:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 427. [2023-11-24 21:48:57,743 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) [2023-11-24 21:48:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 638 transitions. [2023-11-24 21:48:57,748 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 638 transitions. Word has length 17 [2023-11-24 21:48:57,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:57,749 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 638 transitions. [2023-11-24 21:48:57,749 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) [2023-11-24 21:48:57,749 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 638 transitions. [2023-11-24 21:48:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:48:57,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:57,750 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] [2023-11-24 21:48:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:48:57,750 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)] === [2023-11-24 21:48:57,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1348043702, now seen corresponding path program 1 times [2023-11-24 21:48:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364666421] [2023-11-24 21:48:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:48:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:57,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364666421] [2023-11-24 21:48:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364666421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:57,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045550765] [2023-11-24 21:48:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:57,829 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) [2023-11-24 21:48:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:57,896 INFO L93 Difference]: Finished difference Result 297 states and 424 transitions. [2023-11-24 21:48:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:57,897 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 [2023-11-24 21:48:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:57,899 INFO L225 Difference]: With dead ends: 297 [2023-11-24 21:48:57,899 INFO L226 Difference]: Without dead ends: 297 [2023-11-24 21:48:57,899 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 [2023-11-24 21:48:57,900 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 [2023-11-24 21:48:57,901 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] [2023-11-24 21:48:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-24 21:48:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2023-11-24 21:48:57,910 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) [2023-11-24 21:48:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2023-11-24 21:48:57,913 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 23 [2023-11-24 21:48:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:57,913 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2023-11-24 21:48:57,913 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) [2023-11-24 21:48:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2023-11-24 21:48:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:48:57,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:57,915 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] [2023-11-24 21:48:57,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:48:57,915 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)] === [2023-11-24 21:48:57,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -780593392, now seen corresponding path program 1 times [2023-11-24 21:48:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314425237] [2023-11-24 21:48:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:48:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:58,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314425237] [2023-11-24 21:48:58,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314425237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:58,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:58,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:48:58,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322473219] [2023-11-24 21:48:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:58,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:48:58,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:48:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:58,053 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) [2023-11-24 21:48:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:58,241 INFO L93 Difference]: Finished difference Result 313 states and 435 transitions. [2023-11-24 21:48:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:48:58,242 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 [2023-11-24 21:48:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:58,244 INFO L225 Difference]: With dead ends: 313 [2023-11-24 21:48:58,244 INFO L226 Difference]: Without dead ends: 313 [2023-11-24 21:48:58,244 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 [2023-11-24 21:48:58,245 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 [2023-11-24 21:48:58,245 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] [2023-11-24 21:48:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-24 21:48:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 294. [2023-11-24 21:48:58,254 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) [2023-11-24 21:48:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 418 transitions. [2023-11-24 21:48:58,257 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 418 transitions. Word has length 25 [2023-11-24 21:48:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:58,257 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 418 transitions. [2023-11-24 21:48:58,257 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) [2023-11-24 21:48:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 418 transitions. [2023-11-24 21:48:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:48:58,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:58,259 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] [2023-11-24 21:48:58,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:48:58,259 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)] === [2023-11-24 21:48:58,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1173620402, now seen corresponding path program 1 times [2023-11-24 21:48:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:58,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307952021] [2023-11-24 21:48:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:48:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307952021] [2023-11-24 21:48:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307952021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418955721] [2023-11-24 21:48:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:58,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:58,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:58,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:48:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:48:58,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:58,970 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 [2023-11-24 21:48:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:59,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:59,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418955721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:59,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:48:59,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2023-11-24 21:48:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561528604] [2023-11-24 21:48:59,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:59,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:48:59,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:48:59,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:48:59,235 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) [2023-11-24 21:48:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:59,935 INFO L93 Difference]: Finished difference Result 389 states and 523 transitions. [2023-11-24 21:48:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:48:59,936 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 [2023-11-24 21:48:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:59,938 INFO L225 Difference]: With dead ends: 389 [2023-11-24 21:48:59,939 INFO L226 Difference]: Without dead ends: 389 [2023-11-24 21:48:59,939 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 [2023-11-24 21:48:59,940 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:59,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 85 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:48:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-24 21:48:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 298. [2023-11-24 21:48:59,952 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) [2023-11-24 21:48:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 412 transitions. [2023-11-24 21:48:59,955 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 412 transitions. Word has length 25 [2023-11-24 21:48:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:59,956 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 412 transitions. [2023-11-24 21:48:59,956 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) [2023-11-24 21:48:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 412 transitions. [2023-11-24 21:48:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:48:59,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:59,957 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] [2023-11-24 21:48:59,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:49:00,165 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)] === [2023-11-24 21:49:00,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -177446873, now seen corresponding path program 1 times [2023-11-24 21:49:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:00,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292878662] [2023-11-24 21:49:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:00,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:00,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292878662] [2023-11-24 21:49:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292878662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:00,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262661421] [2023-11-24 21:49:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:00,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:00,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:00,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:00,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:49:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:00,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:49:00,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:00,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:00,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262661421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:00,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:49:00,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-24 21:49:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265968196] [2023-11-24 21:49:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:49:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:00,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:49:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:49:00,632 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) [2023-11-24 21:49:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:00,729 INFO L93 Difference]: Finished difference Result 347 states and 465 transitions. [2023-11-24 21:49:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:49:00,730 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 [2023-11-24 21:49:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:00,732 INFO L225 Difference]: With dead ends: 347 [2023-11-24 21:49:00,732 INFO L226 Difference]: Without dead ends: 347 [2023-11-24 21:49:00,733 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 [2023-11-24 21:49:00,733 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-24 21:49:00,733 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] [2023-11-24 21:49:00,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-24 21:49:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 304. [2023-11-24 21:49:00,745 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) [2023-11-24 21:49:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 418 transitions. [2023-11-24 21:49:00,748 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 418 transitions. Word has length 26 [2023-11-24 21:49:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:00,748 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 418 transitions. [2023-11-24 21:49:00,748 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) [2023-11-24 21:49:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 418 transitions. [2023-11-24 21:49:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:49:00,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:00,750 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] [2023-11-24 21:49:00,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:49:00,956 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)] === [2023-11-24 21:49:00,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:00,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1727191021, now seen corresponding path program 1 times [2023-11-24 21:49:00,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:00,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328170861] [2023-11-24 21:49:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:01,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328170861] [2023-11-24 21:49:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328170861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010224615] [2023-11-24 21:49:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:01,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:01,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:49:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:01,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 21:49:01,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:02,169 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 [2023-11-24 21:49:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:02,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010224615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:02,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-24 21:49:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895584291] [2023-11-24 21:49:02,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:49:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:49:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:49:02,490 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) [2023-11-24 21:49:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:03,286 INFO L93 Difference]: Finished difference Result 348 states and 461 transitions. [2023-11-24 21:49:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:49:03,286 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 [2023-11-24 21:49:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:03,289 INFO L225 Difference]: With dead ends: 348 [2023-11-24 21:49:03,289 INFO L226 Difference]: Without dead ends: 348 [2023-11-24 21:49:03,290 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 [2023-11-24 21:49:03,290 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 [2023-11-24 21:49:03,291 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] [2023-11-24 21:49:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-24 21:49:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 305. [2023-11-24 21:49:03,303 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) [2023-11-24 21:49:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 414 transitions. [2023-11-24 21:49:03,306 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 414 transitions. Word has length 27 [2023-11-24 21:49:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:03,306 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 414 transitions. [2023-11-24 21:49:03,307 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) [2023-11-24 21:49:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 414 transitions. [2023-11-24 21:49:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:49:03,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:03,308 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] [2023-11-24 21:49:03,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:03,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:49:03,514 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)] === [2023-11-24 21:49:03,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2003314146, now seen corresponding path program 1 times [2023-11-24 21:49:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:03,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239082420] [2023-11-24 21:49:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:03,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239082420] [2023-11-24 21:49:03,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239082420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252473054] [2023-11-24 21:49:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:03,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:03,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:03,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:49:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:03,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:49:03,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:03,978 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:49:03,978 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 [2023-11-24 21:49:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:04,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:04,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252473054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:04,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:04,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-24 21:49:04,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885988280] [2023-11-24 21:49:04,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:49:04,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:49:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:49:04,091 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) [2023-11-24 21:49:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:04,653 INFO L93 Difference]: Finished difference Result 419 states and 527 transitions. [2023-11-24 21:49:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:49:04,654 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 [2023-11-24 21:49:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:04,657 INFO L225 Difference]: With dead ends: 419 [2023-11-24 21:49:04,657 INFO L226 Difference]: Without dead ends: 419 [2023-11-24 21:49:04,657 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 [2023-11-24 21:49:04,658 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:04,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 168 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:49:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-24 21:49:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 378. [2023-11-24 21:49:04,669 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) [2023-11-24 21:49:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 499 transitions. [2023-11-24 21:49:04,672 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 499 transitions. Word has length 28 [2023-11-24 21:49:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:04,672 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 499 transitions. [2023-11-24 21:49:04,673 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) [2023-11-24 21:49:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 499 transitions. [2023-11-24 21:49:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:49:04,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:04,674 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] [2023-11-24 21:49:04,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:04,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 21:49:04,880 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)] === [2023-11-24 21:49:04,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1973196431, now seen corresponding path program 1 times [2023-11-24 21:49:04,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320321506] [2023-11-24 21:49:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:05,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320321506] [2023-11-24 21:49:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320321506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:05,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542186415] [2023-11-24 21:49:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:05,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:05,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:05,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:05,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:49:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:49:05,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:05,369 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 [2023-11-24 21:49:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:05,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:05,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542186415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:05,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2023-11-24 21:49:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246232167] [2023-11-24 21:49:05,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:49:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:49:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:49:05,611 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) [2023-11-24 21:49:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:06,380 INFO L93 Difference]: Finished difference Result 507 states and 621 transitions. [2023-11-24 21:49:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:49:06,382 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 [2023-11-24 21:49:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:06,385 INFO L225 Difference]: With dead ends: 507 [2023-11-24 21:49:06,385 INFO L226 Difference]: Without dead ends: 507 [2023-11-24 21:49:06,386 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 [2023-11-24 21:49:06,386 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 [2023-11-24 21:49:06,387 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] [2023-11-24 21:49:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-24 21:49:06,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 463. [2023-11-24 21:49:06,400 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) [2023-11-24 21:49:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 597 transitions. [2023-11-24 21:49:06,403 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 597 transitions. Word has length 29 [2023-11-24 21:49:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:06,405 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 597 transitions. [2023-11-24 21:49:06,405 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) [2023-11-24 21:49:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 597 transitions. [2023-11-24 21:49:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:49:06,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:06,406 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] [2023-11-24 21:49:06,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:06,612 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)] === [2023-11-24 21:49:06,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1854582443, now seen corresponding path program 1 times [2023-11-24 21:49:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724356896] [2023-11-24 21:49:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:06,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:06,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724356896] [2023-11-24 21:49:06,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724356896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:06,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573103774] [2023-11-24 21:49:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:06,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:06,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:49:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:07,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:49:07,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:07,381 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 [2023-11-24 21:49:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:07,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:07,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573103774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:07,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2023-11-24 21:49:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765823753] [2023-11-24 21:49:07,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 21:49:07,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 21:49:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:49:07,782 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) [2023-11-24 21:49:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:08,562 INFO L93 Difference]: Finished difference Result 547 states and 665 transitions. [2023-11-24 21:49:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:49:08,563 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 [2023-11-24 21:49:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:08,566 INFO L225 Difference]: With dead ends: 547 [2023-11-24 21:49:08,566 INFO L226 Difference]: Without dead ends: 547 [2023-11-24 21:49:08,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:49:08,567 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 [2023-11-24 21:49:08,568 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] [2023-11-24 21:49:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-24 21:49:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 460. [2023-11-24 21:49:08,596 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) [2023-11-24 21:49:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 576 transitions. [2023-11-24 21:49:08,599 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 576 transitions. Word has length 33 [2023-11-24 21:49:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:08,600 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 576 transitions. [2023-11-24 21:49:08,600 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) [2023-11-24 21:49:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 576 transitions. [2023-11-24 21:49:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 21:49:08,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:08,601 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] [2023-11-24 21:49:08,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:08,807 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)] === [2023-11-24 21:49:08,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2145365376, now seen corresponding path program 1 times [2023-11-24 21:49:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341061396] [2023-11-24 21:49:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:09,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341061396] [2023-11-24 21:49:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341061396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829747056] [2023-11-24 21:49:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:09,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:09,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:09,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:49:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:09,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:49:09,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:09,347 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:49:09,348 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 [2023-11-24 21:49:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:49:09,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:09,460 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 [2023-11-24 21:49:09,662 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 [2023-11-24 21:49:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:49:09,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829747056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:09,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-24 21:49:09,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588418372] [2023-11-24 21:49:09,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:49:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:09,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:49:09,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:49:09,691 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) [2023-11-24 21:49:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:10,208 INFO L93 Difference]: Finished difference Result 499 states and 602 transitions. [2023-11-24 21:49:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:49:10,209 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 [2023-11-24 21:49:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:10,212 INFO L225 Difference]: With dead ends: 499 [2023-11-24 21:49:10,212 INFO L226 Difference]: Without dead ends: 499 [2023-11-24 21:49:10,213 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 [2023-11-24 21:49:10,213 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 [2023-11-24 21:49:10,214 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] [2023-11-24 21:49:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-24 21:49:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 463. [2023-11-24 21:49:10,228 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) [2023-11-24 21:49:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 578 transitions. [2023-11-24 21:49:10,232 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 578 transitions. Word has length 34 [2023-11-24 21:49:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:10,233 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 578 transitions. [2023-11-24 21:49:10,233 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) [2023-11-24 21:49:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 578 transitions. [2023-11-24 21:49:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:49:10,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:10,234 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] [2023-11-24 21:49:10,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:10,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 21:49:10,440 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)] === [2023-11-24 21:49:10,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2081817197, now seen corresponding path program 1 times [2023-11-24 21:49:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:10,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491475359] [2023-11-24 21:49:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:10,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491475359] [2023-11-24 21:49:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491475359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133084863] [2023-11-24 21:49:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:11,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:11,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:11,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:11,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:49:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:11,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:49:11,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:11,646 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 [2023-11-24 21:49:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:11,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:11,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133084863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:11,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:11,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-24 21:49:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284967265] [2023-11-24 21:49:11,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:49:11,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:11,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:49:11,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:49:11,857 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) [2023-11-24 21:49:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:13,014 INFO L93 Difference]: Finished difference Result 566 states and 667 transitions. [2023-11-24 21:49:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:49:13,021 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 [2023-11-24 21:49:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:13,024 INFO L225 Difference]: With dead ends: 566 [2023-11-24 21:49:13,024 INFO L226 Difference]: Without dead ends: 566 [2023-11-24 21:49:13,025 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 [2023-11-24 21:49:13,027 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 [2023-11-24 21:49:13,027 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] [2023-11-24 21:49:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-11-24 21:49:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 428. [2023-11-24 21:49:13,040 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) [2023-11-24 21:49:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 530 transitions. [2023-11-24 21:49:13,043 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 530 transitions. Word has length 35 [2023-11-24 21:49:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:13,043 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 530 transitions. [2023-11-24 21:49:13,043 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) [2023-11-24 21:49:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 530 transitions. [2023-11-24 21:49:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:49:13,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:13,044 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] [2023-11-24 21:49:13,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-24 21:49:13,250 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)] === [2023-11-24 21:49:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -828432177, now seen corresponding path program 1 times [2023-11-24 21:49:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126968194] [2023-11-24 21:49:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126968194] [2023-11-24 21:49:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126968194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678356886] [2023-11-24 21:49:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:13,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:13,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:49:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:49:13,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:13,699 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 [2023-11-24 21:49:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:13,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:14,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678356886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:14,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:14,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-24 21:49:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204286830] [2023-11-24 21:49:14,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:49:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:49:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:49:14,023 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) [2023-11-24 21:49:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:14,726 INFO L93 Difference]: Finished difference Result 465 states and 549 transitions. [2023-11-24 21:49:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-24 21:49:14,727 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 [2023-11-24 21:49:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:14,729 INFO L225 Difference]: With dead ends: 465 [2023-11-24 21:49:14,729 INFO L226 Difference]: Without dead ends: 465 [2023-11-24 21:49:14,730 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 [2023-11-24 21:49:14,731 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 [2023-11-24 21:49:14,731 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] [2023-11-24 21:49:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-24 21:49:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 428. [2023-11-24 21:49:14,742 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) [2023-11-24 21:49:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 529 transitions. [2023-11-24 21:49:14,745 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 529 transitions. Word has length 37 [2023-11-24 21:49:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:14,746 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 529 transitions. [2023-11-24 21:49:14,746 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) [2023-11-24 21:49:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 529 transitions. [2023-11-24 21:49:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 21:49:14,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:14,747 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] [2023-11-24 21:49:14,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 21:49:14,954 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)] === [2023-11-24 21:49:14,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash 49098310, now seen corresponding path program 2 times [2023-11-24 21:49:14,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:14,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294519070] [2023-11-24 21:49:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:14,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294519070] [2023-11-24 21:49:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294519070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471853761] [2023-11-24 21:49:15,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:49:15,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:15,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:15,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:49:15,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:49:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:15,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:49:15,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:15,761 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 [2023-11-24 21:49:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:15,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471853761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:16,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:16,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2023-11-24 21:49:16,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730472332] [2023-11-24 21:49:16,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:16,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:49:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:16,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:49:16,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:49:16,111 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) [2023-11-24 21:49:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:17,328 INFO L93 Difference]: Finished difference Result 518 states and 608 transitions. [2023-11-24 21:49:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 21:49:17,328 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 [2023-11-24 21:49:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:17,331 INFO L225 Difference]: With dead ends: 518 [2023-11-24 21:49:17,331 INFO L226 Difference]: Without dead ends: 518 [2023-11-24 21:49:17,332 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 [2023-11-24 21:49:17,333 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 [2023-11-24 21:49:17,333 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] [2023-11-24 21:49:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-11-24 21:49:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2023-11-24 21:49:17,344 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) [2023-11-24 21:49:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 477 transitions. [2023-11-24 21:49:17,347 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 477 transitions. Word has length 43 [2023-11-24 21:49:17,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:17,347 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 477 transitions. [2023-11-24 21:49:17,348 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) [2023-11-24 21:49:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 477 transitions. [2023-11-24 21:49:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 21:49:17,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:17,349 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] [2023-11-24 21:49:17,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:17,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 21:49:17,560 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)] === [2023-11-24 21:49:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash 558007675, now seen corresponding path program 1 times [2023-11-24 21:49:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:17,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222097185] [2023-11-24 21:49:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:17,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:17,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222097185] [2023-11-24 21:49:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222097185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:17,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635420852] [2023-11-24 21:49:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:17,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:17,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:17,677 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:49:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:17,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:49:17,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:49:17,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:17,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635420852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:17,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:49:17,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-24 21:49:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037743931] [2023-11-24 21:49:17,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:17,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:49:17,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:49:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:49:17,850 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) [2023-11-24 21:49:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:17,884 INFO L93 Difference]: Finished difference Result 444 states and 520 transitions. [2023-11-24 21:49:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:49:17,885 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 [2023-11-24 21:49:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:17,887 INFO L225 Difference]: With dead ends: 444 [2023-11-24 21:49:17,887 INFO L226 Difference]: Without dead ends: 444 [2023-11-24 21:49:17,887 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 [2023-11-24 21:49:17,888 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 [2023-11-24 21:49:17,889 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] [2023-11-24 21:49:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-24 21:49:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 378. [2023-11-24 21:49:17,904 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) [2023-11-24 21:49:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 451 transitions. [2023-11-24 21:49:17,906 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 451 transitions. Word has length 43 [2023-11-24 21:49:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:17,907 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 451 transitions. [2023-11-24 21:49:17,908 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) [2023-11-24 21:49:17,908 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 451 transitions. [2023-11-24 21:49:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:49:17,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:17,909 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] [2023-11-24 21:49:17,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:18,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 21:49:18,115 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)] === [2023-11-24 21:49:18,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 977756381, now seen corresponding path program 1 times [2023-11-24 21:49:18,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:18,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220503212] [2023-11-24 21:49:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:18,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220503212] [2023-11-24 21:49:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220503212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594541080] [2023-11-24 21:49:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:18,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:18,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:18,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:49:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:49:18,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:18,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594541080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:18,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:49:18,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-24 21:49:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006070208] [2023-11-24 21:49:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:18,372 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) [2023-11-24 21:49:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:18,397 INFO L93 Difference]: Finished difference Result 377 states and 448 transitions. [2023-11-24 21:49:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:18,397 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 [2023-11-24 21:49:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:18,399 INFO L225 Difference]: With dead ends: 377 [2023-11-24 21:49:18,399 INFO L226 Difference]: Without dead ends: 377 [2023-11-24 21:49:18,400 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 [2023-11-24 21:49:18,400 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 [2023-11-24 21:49:18,402 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] [2023-11-24 21:49:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-24 21:49:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2023-11-24 21:49:18,414 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) [2023-11-24 21:49:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 448 transitions. [2023-11-24 21:49:18,417 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 448 transitions. Word has length 44 [2023-11-24 21:49:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:18,417 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 448 transitions. [2023-11-24 21:49:18,418 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) [2023-11-24 21:49:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 448 transitions. [2023-11-24 21:49:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:49:18,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:18,419 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] [2023-11-24 21:49:18,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:18,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:49:18,626 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)] === [2023-11-24 21:49:18,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash 245676811, now seen corresponding path program 1 times [2023-11-24 21:49:18,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:18,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010576459] [2023-11-24 21:49:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:18,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010576459] [2023-11-24 21:49:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010576459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736659175] [2023-11-24 21:49:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:18,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:18,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:18,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 21:49:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:18,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:49:18,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:18,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736659175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:49:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-24 21:49:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110599156] [2023-11-24 21:49:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:18,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:18,934 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) [2023-11-24 21:49:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:18,985 INFO L93 Difference]: Finished difference Result 376 states and 444 transitions. [2023-11-24 21:49:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:49:18,986 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 [2023-11-24 21:49:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:18,988 INFO L225 Difference]: With dead ends: 376 [2023-11-24 21:49:18,989 INFO L226 Difference]: Without dead ends: 376 [2023-11-24 21:49:18,989 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 [2023-11-24 21:49:18,990 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 [2023-11-24 21:49:18,990 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] [2023-11-24 21:49:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-24 21:49:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2023-11-24 21:49:19,005 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) [2023-11-24 21:49:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 444 transitions. [2023-11-24 21:49:19,008 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 444 transitions. Word has length 45 [2023-11-24 21:49:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:19,009 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 444 transitions. [2023-11-24 21:49:19,009 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) [2023-11-24 21:49:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 444 transitions. [2023-11-24 21:49:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-24 21:49:19,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:19,010 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] [2023-11-24 21:49:19,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:19,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:49:19,217 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)] === [2023-11-24 21:49:19,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash -973953377, now seen corresponding path program 1 times [2023-11-24 21:49:19,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:19,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543299196] [2023-11-24 21:49:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:19,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543299196] [2023-11-24 21:49:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543299196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750642373] [2023-11-24 21:49:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:19,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:19,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:19,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 21:49:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:19,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:49:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:19,457 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 [2023-11-24 21:49:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:49:19,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:49:19,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750642373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:19,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:49:19,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-11-24 21:49:19,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484781417] [2023-11-24 21:49:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:19,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:49:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:49:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:19,513 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) [2023-11-24 21:49:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:19,602 INFO L93 Difference]: Finished difference Result 389 states and 451 transitions. [2023-11-24 21:49:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:49:19,604 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 [2023-11-24 21:49:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:19,609 INFO L225 Difference]: With dead ends: 389 [2023-11-24 21:49:19,609 INFO L226 Difference]: Without dead ends: 389 [2023-11-24 21:49:19,609 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 [2023-11-24 21:49:19,615 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 [2023-11-24 21:49:19,616 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] [2023-11-24 21:49:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-24 21:49:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 376. [2023-11-24 21:49:19,627 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) [2023-11-24 21:49:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 441 transitions. [2023-11-24 21:49:19,631 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 441 transitions. Word has length 46 [2023-11-24 21:49:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:19,631 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 441 transitions. [2023-11-24 21:49:19,631 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) [2023-11-24 21:49:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 441 transitions. [2023-11-24 21:49:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-24 21:49:19,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:19,633 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] [2023-11-24 21:49:19,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:19,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:49:19,839 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)] === [2023-11-24 21:49:19,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash -169332805, now seen corresponding path program 1 times [2023-11-24 21:49:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:19,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95254761] [2023-11-24 21:49:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:19,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:49:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-24 21:49:20,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95254761] [2023-11-24 21:49:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95254761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36094481] [2023-11-24 21:49:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:20,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:20,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:20,171 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:20,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 21:49:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:20,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:49:20,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:20,390 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:49:20,391 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 [2023-11-24 21:49:20,470 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:49:20,471 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 [2023-11-24 21:49:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-24 21:49:20,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:20,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36094481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:20,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:20,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2023-11-24 21:49:20,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580195617] [2023-11-24 21:49:20,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:20,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:49:20,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:49:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:49:20,588 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) [2023-11-24 21:49:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:21,107 INFO L93 Difference]: Finished difference Result 444 states and 512 transitions. [2023-11-24 21:49:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:49:21,108 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 [2023-11-24 21:49:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:21,109 INFO L225 Difference]: With dead ends: 444 [2023-11-24 21:49:21,110 INFO L226 Difference]: Without dead ends: 444 [2023-11-24 21:49:21,110 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 [2023-11-24 21:49:21,111 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 [2023-11-24 21:49:21,111 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] [2023-11-24 21:49:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-24 21:49:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 414. [2023-11-24 21:49:21,121 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) [2023-11-24 21:49:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 485 transitions. [2023-11-24 21:49:21,124 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 485 transitions. Word has length 48 [2023-11-24 21:49:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:21,124 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 485 transitions. [2023-11-24 21:49:21,124 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) [2023-11-24 21:49:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 485 transitions. [2023-11-24 21:49:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 21:49:21,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:21,126 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] [2023-11-24 21:49:21,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:21,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-24 21:49:21,332 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)] === [2023-11-24 21:49:21,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash -954349610, now seen corresponding path program 1 times [2023-11-24 21:49:21,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:21,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705286946] [2023-11-24 21:49:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:21,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:49:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:49:21,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705286946] [2023-11-24 21:49:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705286946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562992595] [2023-11-24 21:49:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:21,793 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:21,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-24 21:49:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 21:49:21,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:22,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:22,099 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 [2023-11-24 21:49:22,115 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:49:22,115 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 [2023-11-24 21:49:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:22,239 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 [2023-11-24 21:49:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 21:49:22,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562992595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:22,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:22,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2023-11-24 21:49:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086956338] [2023-11-24 21:49:22,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:49:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:49:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:49:22,502 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) [2023-11-24 21:49:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:23,664 INFO L93 Difference]: Finished difference Result 446 states and 501 transitions. [2023-11-24 21:49:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:49:23,665 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 [2023-11-24 21:49:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:23,667 INFO L225 Difference]: With dead ends: 446 [2023-11-24 21:49:23,667 INFO L226 Difference]: Without dead ends: 446 [2023-11-24 21:49:23,668 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 [2023-11-24 21:49:23,669 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:23,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 259 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:49:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-24 21:49:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 416. [2023-11-24 21:49:23,679 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) [2023-11-24 21:49:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 475 transitions. [2023-11-24 21:49:23,682 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 475 transitions. Word has length 49 [2023-11-24 21:49:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:23,682 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 475 transitions. [2023-11-24 21:49:23,683 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) [2023-11-24 21:49:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 475 transitions. [2023-11-24 21:49:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 21:49:23,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:23,684 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] [2023-11-24 21:49:23,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:23,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:23,899 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)] === [2023-11-24 21:49:23,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 139291547, now seen corresponding path program 1 times [2023-11-24 21:49:23,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:23,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929368952] [2023-11-24 21:49:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:23,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:49:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:49:24,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929368952] [2023-11-24 21:49:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929368952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432111248] [2023-11-24 21:49:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:24,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:24,120 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:24,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-24 21:49:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:49:24,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:24,380 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:49:24,380 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 [2023-11-24 21:49:24,604 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:49:24,605 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 [2023-11-24 21:49:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:49:24,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:24,707 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 [2023-11-24 21:49:24,845 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 [2023-11-24 21:49:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:49:25,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432111248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:25,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:25,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2023-11-24 21:49:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13027992] [2023-11-24 21:49:25,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:25,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:49:25,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:49:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:49:25,035 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) [2023-11-24 21:49:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:25,299 INFO L93 Difference]: Finished difference Result 433 states and 492 transitions. [2023-11-24 21:49:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:49:25,300 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 [2023-11-24 21:49:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:25,302 INFO L225 Difference]: With dead ends: 433 [2023-11-24 21:49:25,302 INFO L226 Difference]: Without dead ends: 433 [2023-11-24 21:49:25,303 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 [2023-11-24 21:49:25,303 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 [2023-11-24 21:49:25,304 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] [2023-11-24 21:49:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-24 21:49:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 415. [2023-11-24 21:49:25,314 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) [2023-11-24 21:49:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 474 transitions. [2023-11-24 21:49:25,316 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 474 transitions. Word has length 54 [2023-11-24 21:49:25,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:25,317 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 474 transitions. [2023-11-24 21:49:25,317 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) [2023-11-24 21:49:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 474 transitions. [2023-11-24 21:49:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 21:49:25,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:25,318 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] [2023-11-24 21:49:25,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:25,525 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)] === [2023-11-24 21:49:25,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 23070642, now seen corresponding path program 1 times [2023-11-24 21:49:25,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:25,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908827913] [2023-11-24 21:49:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:25,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:26,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:49:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 21:49:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908827913] [2023-11-24 21:49:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908827913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385451878] [2023-11-24 21:49:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:26,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:26,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-24 21:49:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:26,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:49:26,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:26,636 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:49:26,637 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 [2023-11-24 21:49:27,030 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:49:27,030 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 [2023-11-24 21:49:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:49:27,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:27,307 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 [2023-11-24 21:49:27,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:49:27,565 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 [2023-11-24 21:49:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:49:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385451878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:27,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:27,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 39 [2023-11-24 21:49:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044533932] [2023-11-24 21:49:27,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:27,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-24 21:49:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-24 21:49:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:49:27,943 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) [2023-11-24 21:49:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:28,947 INFO L93 Difference]: Finished difference Result 496 states and 559 transitions. [2023-11-24 21:49:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:49:28,947 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 [2023-11-24 21:49:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:28,950 INFO L225 Difference]: With dead ends: 496 [2023-11-24 21:49:28,950 INFO L226 Difference]: Without dead ends: 496 [2023-11-24 21:49:28,953 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 [2023-11-24 21:49:28,953 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 [2023-11-24 21:49:28,954 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] [2023-11-24 21:49:28,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-24 21:49:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 415. [2023-11-24 21:49:28,968 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) [2023-11-24 21:49:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 473 transitions. [2023-11-24 21:49:28,971 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 473 transitions. Word has length 55 [2023-11-24 21:49:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:28,971 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 473 transitions. [2023-11-24 21:49:28,972 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) [2023-11-24 21:49:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 473 transitions. [2023-11-24 21:49:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 21:49:28,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:28,979 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] [2023-11-24 21:49:28,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:29,185 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)] === [2023-11-24 21:49:29,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash 861481531, now seen corresponding path program 1 times [2023-11-24 21:49:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122107454] [2023-11-24 21:49:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:29,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:49:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:49:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:49:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122107454] [2023-11-24 21:49:29,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122107454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534802729] [2023-11-24 21:49:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:29,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:29,927 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:29,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f067b103-e2b2-452a-8b2f-3cb4ceb0f12d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-24 21:49:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:30,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-24 21:49:30,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:30,712 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 [2023-11-24 21:49:30,739 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:49:30,740 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 [2023-11-24 21:49:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:31,167 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 [2023-11-24 21:49:31,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:49:31,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:49:31,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:49:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:49:31,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:31,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534802729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:31,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:49:31,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2023-11-24 21:49:31,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321588849] [2023-11-24 21:49:31,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:31,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:49:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:49:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:49:31,862 INFO L87 Difference]: Start difference. First operand 415 states and 473 transitions. Second operand has 26 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 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)