./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.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_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:59:57,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:59:57,509 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:59:57,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:59:57,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:59:57,543 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:59:57,544 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:59:57,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:59:57,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:59:57,546 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:59:57,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:59:57,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:59:57,548 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:59:57,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:59:57,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:59:57,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:59:57,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:59:57,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:59:57,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:59:57,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:59:57,553 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:59:57,554 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:59:57,555 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:59:57,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:59:57,556 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:59:57,556 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:59:57,557 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:59:57,558 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:59:57,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:59:57,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:59:57,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:59:57,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:59:57,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:59:57,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:59:57,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:59:57,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:59:57,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:59:57,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:59:57,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:59:57,563 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:59:57,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:59:57,564 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_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2023-11-26 11:59:57,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:59:57,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:59:57,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:59:57,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:59:57,855 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:59:57,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-11-26 12:00:01,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:00:01,532 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:00:01,533 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-11-26 12:00:01,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/data/b01b6282a/4c01f06f675c4cbe8811fd03920ee133/FLAG1a36d9fc9 [2023-11-26 12:00:01,580 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/data/b01b6282a/4c01f06f675c4cbe8811fd03920ee133 [2023-11-26 12:00:01,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:00:01,584 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:00:01,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:01,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:00:01,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:00:01,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:01" (1/1) ... [2023-11-26 12:00:01,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ce9447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:01, skipping insertion in model container [2023-11-26 12:00:01,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:00:01" (1/1) ... [2023-11-26 12:00:01,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:00:02,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:02,102 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:00:02,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:00:02,224 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:00:02,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02 WrapperNode [2023-11-26 12:00:02,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:00:02,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:02,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:00:02,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:00:02,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,309 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 219 [2023-11-26 12:00:02,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:00:02,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:00:02,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:00:02,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:00:02,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,366 INFO L175 MemorySlicer]: Split 27 memory accesses to 3 slices as follows [2, 7, 18]. 67 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 2]. The 11 writes are split as follows [0, 5, 6]. [2023-11-26 12:00:02,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:00:02,395 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:00:02,395 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:00:02,395 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:00:02,396 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (1/1) ... [2023-11-26 12:00:02,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:00:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:02,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:00:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:00:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-11-26 12:00:02,482 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-11-26 12:00:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:00:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:00:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:00:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:00:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:00:02,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 12:00:02,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 12:00:02,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 12:00:02,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 12:00:02,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 12:00:02,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 12:00:02,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:00:02,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:00:02,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:00:02,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:00:02,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:00:02,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:00:02,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:00:02,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:00:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:00:02,650 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:00:02,653 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:00:03,257 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:00:03,316 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:00:03,317 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 12:00:03,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:03 BoogieIcfgContainer [2023-11-26 12:00:03,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:00:03,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:00:03,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:00:03,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:00:03,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:00:01" (1/3) ... [2023-11-26 12:00:03,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667b9b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:03, skipping insertion in model container [2023-11-26 12:00:03,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:00:02" (2/3) ... [2023-11-26 12:00:03,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@667b9b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:00:03, skipping insertion in model container [2023-11-26 12:00:03,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:00:03" (3/3) ... [2023-11-26 12:00:03,328 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2023-11-26 12:00:03,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:00:03,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-11-26 12:00:03,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:00:03,404 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;@66cd7a64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:00:03,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-11-26 12:00:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 72 states have (on average 2.125) internal successors, (153), 129 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 12:00:03,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:03,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:00:03,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:03,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash 296113697, now seen corresponding path program 1 times [2023-11-26 12:00:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:03,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385345209] [2023-11-26 12:00:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:03,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385345209] [2023-11-26 12:00:03,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385345209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:03,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:03,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:03,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296156859] [2023-11-26 12:00:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:03,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:00:03,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:00:03,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:03,705 INFO L87 Difference]: Start difference. First operand has 133 states, 72 states have (on average 2.125) internal successors, (153), 129 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:03,798 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2023-11-26 12:00:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:00:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 12:00:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:03,813 INFO L225 Difference]: With dead ends: 133 [2023-11-26 12:00:03,813 INFO L226 Difference]: Without dead ends: 131 [2023-11-26 12:00:03,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:00:03,820 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:03,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-26 12:00:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-26 12:00:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2023-11-26 12:00:03,872 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 5 [2023-11-26 12:00:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2023-11-26 12:00:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2023-11-26 12:00:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 12:00:03,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:03,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:00:03,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:03,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1024117322, now seen corresponding path program 1 times [2023-11-26 12:00:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552665672] [2023-11-26 12:00:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:03,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:03,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552665672] [2023-11-26 12:00:03,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552665672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:03,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:03,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:03,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027890417] [2023-11-26 12:00:03,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:03,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:03,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:03,985 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:04,144 INFO L93 Difference]: Finished difference Result 261 states and 296 transitions. [2023-11-26 12:00:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 12:00:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:04,152 INFO L225 Difference]: With dead ends: 261 [2023-11-26 12:00:04,153 INFO L226 Difference]: Without dead ends: 261 [2023-11-26 12:00:04,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:04,154 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 146 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:04,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 388 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-26 12:00:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 133. [2023-11-26 12:00:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 129 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2023-11-26 12:00:04,171 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 7 [2023-11-26 12:00:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:04,171 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2023-11-26 12:00:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2023-11-26 12:00:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 12:00:04,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:04,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:00:04,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:04,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1025964364, now seen corresponding path program 1 times [2023-11-26 12:00:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:04,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404873483] [2023-11-26 12:00:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404873483] [2023-11-26 12:00:04,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404873483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:04,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:04,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:04,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387352043] [2023-11-26 12:00:04,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:04,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:04,350 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:04,530 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2023-11-26 12:00:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 12:00:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:04,533 INFO L225 Difference]: With dead ends: 242 [2023-11-26 12:00:04,533 INFO L226 Difference]: Without dead ends: 242 [2023-11-26 12:00:04,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:04,535 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 131 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:04,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 280 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-26 12:00:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 179. [2023-11-26 12:00:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 2.0) internal successors, (232), 173 states have internal predecessors, (232), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 12:00:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 240 transitions. [2023-11-26 12:00:04,555 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 240 transitions. Word has length 7 [2023-11-26 12:00:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:04,556 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 240 transitions. [2023-11-26 12:00:04,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 240 transitions. [2023-11-26 12:00:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 12:00:04,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:04,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:04,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:00:04,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:04,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:04,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1025964365, now seen corresponding path program 1 times [2023-11-26 12:00:04,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:04,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319888807] [2023-11-26 12:00:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:04,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319888807] [2023-11-26 12:00:04,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319888807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:04,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:04,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:00:04,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038096040] [2023-11-26 12:00:04,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:04,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:04,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:04,633 INFO L87 Difference]: Start difference. First operand 179 states and 240 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:04,842 INFO L93 Difference]: Finished difference Result 346 states and 463 transitions. [2023-11-26 12:00:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:04,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 12:00:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:04,848 INFO L225 Difference]: With dead ends: 346 [2023-11-26 12:00:04,848 INFO L226 Difference]: Without dead ends: 346 [2023-11-26 12:00:04,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:04,856 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 131 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:04,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 178 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-26 12:00:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 251. [2023-11-26 12:00:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 182 states have (on average 1.934065934065934) internal successors, (352), 240 states have internal predecessors, (352), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 368 transitions. [2023-11-26 12:00:04,879 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 368 transitions. Word has length 7 [2023-11-26 12:00:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:04,880 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 368 transitions. [2023-11-26 12:00:04,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 368 transitions. [2023-11-26 12:00:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 12:00:04,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:04,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:00:04,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:04,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1025964302, now seen corresponding path program 1 times [2023-11-26 12:00:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529180915] [2023-11-26 12:00:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:05,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529180915] [2023-11-26 12:00:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529180915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:05,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:05,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764788077] [2023-11-26 12:00:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:05,069 INFO L87 Difference]: Start difference. First operand 251 states and 368 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,239 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2023-11-26 12:00:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 12:00:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,241 INFO L225 Difference]: With dead ends: 316 [2023-11-26 12:00:05,242 INFO L226 Difference]: Without dead ends: 316 [2023-11-26 12:00:05,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:05,244 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 115 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 292 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-26 12:00:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 251. [2023-11-26 12:00:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 182 states have (on average 1.934065934065934) internal successors, (352), 240 states have internal predecessors, (352), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 368 transitions. [2023-11-26 12:00:05,277 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 368 transitions. Word has length 7 [2023-11-26 12:00:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,277 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 368 transitions. [2023-11-26 12:00:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 368 transitions. [2023-11-26 12:00:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-26 12:00:05,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:00:05,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:05,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1890770718, now seen corresponding path program 1 times [2023-11-26 12:00:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092344445] [2023-11-26 12:00:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092344445] [2023-11-26 12:00:05,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092344445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:05,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:05,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566005774] [2023-11-26 12:00:05,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:05,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:05,354 INFO L87 Difference]: Start difference. First operand 251 states and 368 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,421 INFO L93 Difference]: Finished difference Result 345 states and 459 transitions. [2023-11-26 12:00:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-26 12:00:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,425 INFO L225 Difference]: With dead ends: 345 [2023-11-26 12:00:05,425 INFO L226 Difference]: Without dead ends: 345 [2023-11-26 12:00:05,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:05,426 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 123 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 263 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-26 12:00:05,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 252. [2023-11-26 12:00:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 183 states have (on average 1.9180327868852458) internal successors, (351), 241 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 367 transitions. [2023-11-26 12:00:05,437 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 367 transitions. Word has length 9 [2023-11-26 12:00:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,437 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 367 transitions. [2023-11-26 12:00:05,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 367 transitions. [2023-11-26 12:00:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 12:00:05,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:00:05,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:05,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1515651170, now seen corresponding path program 1 times [2023-11-26 12:00:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275049284] [2023-11-26 12:00:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:05,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275049284] [2023-11-26 12:00:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275049284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:05,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:00:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211421328] [2023-11-26 12:00:05,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:05,503 INFO L87 Difference]: Start difference. First operand 252 states and 367 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,631 INFO L93 Difference]: Finished difference Result 303 states and 414 transitions. [2023-11-26 12:00:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-26 12:00:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,634 INFO L225 Difference]: With dead ends: 303 [2023-11-26 12:00:05,634 INFO L226 Difference]: Without dead ends: 297 [2023-11-26 12:00:05,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:05,636 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 69 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 203 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-26 12:00:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 249. [2023-11-26 12:00:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 180 states have (on average 1.9222222222222223) internal successors, (346), 238 states have internal predecessors, (346), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 362 transitions. [2023-11-26 12:00:05,645 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 362 transitions. Word has length 10 [2023-11-26 12:00:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,646 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 362 transitions. [2023-11-26 12:00:05,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:00:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 362 transitions. [2023-11-26 12:00:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 12:00:05,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 12:00:05,648 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:05,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 502972840, now seen corresponding path program 1 times [2023-11-26 12:00:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817762625] [2023-11-26 12:00:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:05,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:05,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817762625] [2023-11-26 12:00:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817762625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:05,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:00:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402363378] [2023-11-26 12:00:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:05,701 INFO L87 Difference]: Start difference. First operand 249 states and 362 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:05,784 INFO L93 Difference]: Finished difference Result 392 states and 555 transitions. [2023-11-26 12:00:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 12:00:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:05,788 INFO L225 Difference]: With dead ends: 392 [2023-11-26 12:00:05,788 INFO L226 Difference]: Without dead ends: 392 [2023-11-26 12:00:05,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:05,790 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 136 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:05,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 374 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-26 12:00:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 253. [2023-11-26 12:00:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 184 states have (on average 1.891304347826087) internal successors, (348), 242 states have internal predecessors, (348), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 364 transitions. [2023-11-26 12:00:05,803 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 364 transitions. Word has length 13 [2023-11-26 12:00:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:05,804 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 364 transitions. [2023-11-26 12:00:05,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 364 transitions. [2023-11-26 12:00:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 12:00:05,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:05,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:05,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 12:00:05,806 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:05,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1312319466, now seen corresponding path program 1 times [2023-11-26 12:00:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157090509] [2023-11-26 12:00:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:05,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:05,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:05,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157090509] [2023-11-26 12:00:05,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157090509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:05,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:05,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385371664] [2023-11-26 12:00:05,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:05,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:05,918 INFO L87 Difference]: Start difference. First operand 253 states and 364 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:06,173 INFO L93 Difference]: Finished difference Result 342 states and 453 transitions. [2023-11-26 12:00:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 12:00:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:06,176 INFO L225 Difference]: With dead ends: 342 [2023-11-26 12:00:06,176 INFO L226 Difference]: Without dead ends: 342 [2023-11-26 12:00:06,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:06,177 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 159 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:06,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 254 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-26 12:00:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 253. [2023-11-26 12:00:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 184 states have (on average 1.858695652173913) internal successors, (342), 242 states have internal predecessors, (342), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 358 transitions. [2023-11-26 12:00:06,189 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 358 transitions. Word has length 13 [2023-11-26 12:00:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:06,189 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 358 transitions. [2023-11-26 12:00:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 358 transitions. [2023-11-26 12:00:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 12:00:06,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:06,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 12:00:06,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:06,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1312319467, now seen corresponding path program 1 times [2023-11-26 12:00:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:06,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34982447] [2023-11-26 12:00:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:06,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:06,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34982447] [2023-11-26 12:00:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34982447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:06,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:06,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:00:06,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937806757] [2023-11-26 12:00:06,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:06,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:00:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:00:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:06,359 INFO L87 Difference]: Start difference. First operand 253 states and 358 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:06,645 INFO L93 Difference]: Finished difference Result 340 states and 432 transitions. [2023-11-26 12:00:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:06,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-26 12:00:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:06,648 INFO L225 Difference]: With dead ends: 340 [2023-11-26 12:00:06,648 INFO L226 Difference]: Without dead ends: 340 [2023-11-26 12:00:06,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:06,649 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 122 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:06,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 456 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-26 12:00:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 291. [2023-11-26 12:00:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 222 states have (on average 1.8558558558558558) internal successors, (412), 278 states have internal predecessors, (412), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 428 transitions. [2023-11-26 12:00:06,659 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 428 transitions. Word has length 13 [2023-11-26 12:00:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:06,660 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 428 transitions. [2023-11-26 12:00:06,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 428 transitions. [2023-11-26 12:00:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 12:00:06,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:06,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:06,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 12:00:06,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:06,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2036887780, now seen corresponding path program 1 times [2023-11-26 12:00:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856263427] [2023-11-26 12:00:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:06,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:00:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:06,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:06,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856263427] [2023-11-26 12:00:06,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856263427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:06,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759617065] [2023-11-26 12:00:06,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:06,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:06,743 INFO L87 Difference]: Start difference. First operand 291 states and 428 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:06,964 INFO L93 Difference]: Finished difference Result 377 states and 517 transitions. [2023-11-26 12:00:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-26 12:00:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:06,967 INFO L225 Difference]: With dead ends: 377 [2023-11-26 12:00:06,967 INFO L226 Difference]: Without dead ends: 377 [2023-11-26 12:00:06,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:06,968 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 127 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:06,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 262 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-26 12:00:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 297. [2023-11-26 12:00:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 228 states have (on average 1.8333333333333333) internal successors, (418), 284 states have internal predecessors, (418), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 434 transitions. [2023-11-26 12:00:06,978 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 434 transitions. Word has length 16 [2023-11-26 12:00:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:06,978 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 434 transitions. [2023-11-26 12:00:06,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 434 transitions. [2023-11-26 12:00:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 12:00:06,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:06,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:06,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 12:00:06,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:06,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2036887779, now seen corresponding path program 1 times [2023-11-26 12:00:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:06,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65267403] [2023-11-26 12:00:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:06,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:00:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:07,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:07,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65267403] [2023-11-26 12:00:07,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65267403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:07,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:07,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:07,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603523020] [2023-11-26 12:00:07,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:07,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:07,122 INFO L87 Difference]: Start difference. First operand 297 states and 434 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:07,321 INFO L93 Difference]: Finished difference Result 328 states and 430 transitions. [2023-11-26 12:00:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-26 12:00:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:07,325 INFO L225 Difference]: With dead ends: 328 [2023-11-26 12:00:07,325 INFO L226 Difference]: Without dead ends: 328 [2023-11-26 12:00:07,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:07,326 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:07,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 308 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-26 12:00:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 297. [2023-11-26 12:00:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 228 states have (on average 1.8070175438596492) internal successors, (412), 284 states have internal predecessors, (412), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 428 transitions. [2023-11-26 12:00:07,337 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 428 transitions. Word has length 16 [2023-11-26 12:00:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:07,337 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 428 transitions. [2023-11-26 12:00:07,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 428 transitions. [2023-11-26 12:00:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 12:00:07,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:07,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:07,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 12:00:07,340 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:07,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash 947621635, now seen corresponding path program 1 times [2023-11-26 12:00:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:07,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474111440] [2023-11-26 12:00:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:07,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:07,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474111440] [2023-11-26 12:00:07,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474111440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:07,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:07,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:00:07,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275362980] [2023-11-26 12:00:07,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:07,395 INFO L87 Difference]: Start difference. First operand 297 states and 428 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:07,485 INFO L93 Difference]: Finished difference Result 294 states and 416 transitions. [2023-11-26 12:00:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-26 12:00:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:07,489 INFO L225 Difference]: With dead ends: 294 [2023-11-26 12:00:07,489 INFO L226 Difference]: Without dead ends: 294 [2023-11-26 12:00:07,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:07,490 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:07,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-26 12:00:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2023-11-26 12:00:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 228 states have (on average 1.7543859649122806) internal successors, (400), 281 states have internal predecessors, (400), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 416 transitions. [2023-11-26 12:00:07,503 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 416 transitions. Word has length 17 [2023-11-26 12:00:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:07,504 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 416 transitions. [2023-11-26 12:00:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 416 transitions. [2023-11-26 12:00:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 12:00:07,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:07,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 12:00:07,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:07,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 947621636, now seen corresponding path program 1 times [2023-11-26 12:00:07,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:07,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902834640] [2023-11-26 12:00:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:07,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:07,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902834640] [2023-11-26 12:00:07,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902834640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:07,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:07,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346468320] [2023-11-26 12:00:07,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:07,625 INFO L87 Difference]: Start difference. First operand 294 states and 416 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:07,753 INFO L93 Difference]: Finished difference Result 324 states and 456 transitions. [2023-11-26 12:00:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:07,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-26 12:00:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:07,756 INFO L225 Difference]: With dead ends: 324 [2023-11-26 12:00:07,756 INFO L226 Difference]: Without dead ends: 324 [2023-11-26 12:00:07,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:07,757 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 23 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:07,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 310 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-26 12:00:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 301. [2023-11-26 12:00:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 236 states have (on average 1.7118644067796611) internal successors, (404), 288 states have internal predecessors, (404), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 420 transitions. [2023-11-26 12:00:07,767 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 420 transitions. Word has length 17 [2023-11-26 12:00:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:07,768 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 420 transitions. [2023-11-26 12:00:07,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 420 transitions. [2023-11-26 12:00:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:00:07,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:07,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:07,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 12:00:07,769 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:07,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:07,770 INFO L85 PathProgramCache]: Analyzing trace with hash -688500347, now seen corresponding path program 1 times [2023-11-26 12:00:07,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961175908] [2023-11-26 12:00:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961175908] [2023-11-26 12:00:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961175908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:00:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553425563] [2023-11-26 12:00:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 12:00:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 12:00:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:07,868 INFO L87 Difference]: Start difference. First operand 301 states and 420 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:07,936 INFO L93 Difference]: Finished difference Result 323 states and 452 transitions. [2023-11-26 12:00:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:00:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-26 12:00:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:07,938 INFO L225 Difference]: With dead ends: 323 [2023-11-26 12:00:07,939 INFO L226 Difference]: Without dead ends: 323 [2023-11-26 12:00:07,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:07,940 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 36 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:07,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 256 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-26 12:00:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 305. [2023-11-26 12:00:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 240 states have (on average 1.7) internal successors, (408), 292 states have internal predecessors, (408), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 424 transitions. [2023-11-26 12:00:07,950 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 424 transitions. Word has length 18 [2023-11-26 12:00:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:07,950 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 424 transitions. [2023-11-26 12:00:07,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 424 transitions. [2023-11-26 12:00:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 12:00:07,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:07,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 12:00:07,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:07,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash -688444643, now seen corresponding path program 1 times [2023-11-26 12:00:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:07,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077604699] [2023-11-26 12:00:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077604699] [2023-11-26 12:00:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077604699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:00:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334793008] [2023-11-26 12:00:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:08,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:08,038 INFO L87 Difference]: Start difference. First operand 305 states and 424 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:08,120 INFO L93 Difference]: Finished difference Result 287 states and 392 transitions. [2023-11-26 12:00:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:00:08,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-26 12:00:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:08,123 INFO L225 Difference]: With dead ends: 287 [2023-11-26 12:00:08,123 INFO L226 Difference]: Without dead ends: 287 [2023-11-26 12:00:08,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:08,124 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 81 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:08,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 666 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-26 12:00:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-26 12:00:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 224 states have (on average 1.6785714285714286) internal successors, (376), 274 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 12:00:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 392 transitions. [2023-11-26 12:00:08,133 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 392 transitions. Word has length 18 [2023-11-26 12:00:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:08,133 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 392 transitions. [2023-11-26 12:00:08,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 392 transitions. [2023-11-26 12:00:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 12:00:08,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:08,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:08,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 12:00:08,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:08,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1281251556, now seen corresponding path program 1 times [2023-11-26 12:00:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:08,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252792553] [2023-11-26 12:00:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:08,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:00:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252792553] [2023-11-26 12:00:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252792553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:08,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:00:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506499252] [2023-11-26 12:00:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:00:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:00:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:00:08,411 INFO L87 Difference]: Start difference. First operand 287 states and 392 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:08,694 INFO L93 Difference]: Finished difference Result 373 states and 489 transitions. [2023-11-26 12:00:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-26 12:00:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:08,697 INFO L225 Difference]: With dead ends: 373 [2023-11-26 12:00:08,697 INFO L226 Difference]: Without dead ends: 373 [2023-11-26 12:00:08,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:00:08,698 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 74 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:08,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 429 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-26 12:00:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 332. [2023-11-26 12:00:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 264 states have (on average 1.6590909090909092) internal successors, (438), 315 states have internal predecessors, (438), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:00:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 460 transitions. [2023-11-26 12:00:08,708 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 460 transitions. Word has length 20 [2023-11-26 12:00:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:08,709 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 460 transitions. [2023-11-26 12:00:08,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 460 transitions. [2023-11-26 12:00:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 12:00:08,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:08,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:08,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 12:00:08,710 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:08,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1064459312, now seen corresponding path program 1 times [2023-11-26 12:00:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238019669] [2023-11-26 12:00:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:08,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:00:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:08,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238019669] [2023-11-26 12:00:08,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238019669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:08,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:08,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:08,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72689133] [2023-11-26 12:00:08,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:08,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:00:08,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:08,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:00:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:00:08,791 INFO L87 Difference]: Start difference. First operand 332 states and 460 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:08,998 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2023-11-26 12:00:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:00:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 12:00:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:09,001 INFO L225 Difference]: With dead ends: 408 [2023-11-26 12:00:09,001 INFO L226 Difference]: Without dead ends: 408 [2023-11-26 12:00:09,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:00:09,002 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 139 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:09,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 251 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-26 12:00:09,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 352. [2023-11-26 12:00:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 284 states have (on average 1.6971830985915493) internal successors, (482), 335 states have internal predecessors, (482), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-26 12:00:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 504 transitions. [2023-11-26 12:00:09,019 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 504 transitions. Word has length 21 [2023-11-26 12:00:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:09,019 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 504 transitions. [2023-11-26 12:00:09,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 504 transitions. [2023-11-26 12:00:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 12:00:09,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:09,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 12:00:09,022 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:09,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1064459313, now seen corresponding path program 1 times [2023-11-26 12:00:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:09,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22239906] [2023-11-26 12:00:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:09,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-26 12:00:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:09,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:09,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22239906] [2023-11-26 12:00:09,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22239906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:09,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:09,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:00:09,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911412240] [2023-11-26 12:00:09,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:09,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:09,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:09,217 INFO L87 Difference]: Start difference. First operand 352 states and 504 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:09,442 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2023-11-26 12:00:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 12:00:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:09,445 INFO L225 Difference]: With dead ends: 310 [2023-11-26 12:00:09,445 INFO L226 Difference]: Without dead ends: 310 [2023-11-26 12:00:09,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:09,446 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 61 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:09,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 687 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-26 12:00:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 298. [2023-11-26 12:00:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 232 states have (on average 1.5991379310344827) internal successors, (371), 283 states have internal predecessors, (371), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:00:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 391 transitions. [2023-11-26 12:00:09,455 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 391 transitions. Word has length 21 [2023-11-26 12:00:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:09,456 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 391 transitions. [2023-11-26 12:00:09,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 391 transitions. [2023-11-26 12:00:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 12:00:09,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:09,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:09,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 12:00:09,457 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:09,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1650176371, now seen corresponding path program 1 times [2023-11-26 12:00:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:09,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289570016] [2023-11-26 12:00:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:09,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289570016] [2023-11-26 12:00:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289570016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:09,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:00:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433377057] [2023-11-26 12:00:09,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:09,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:09,722 INFO L87 Difference]: Start difference. First operand 298 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:09,977 INFO L93 Difference]: Finished difference Result 308 states and 387 transitions. [2023-11-26 12:00:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:00:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-11-26 12:00:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:09,979 INFO L225 Difference]: With dead ends: 308 [2023-11-26 12:00:09,979 INFO L226 Difference]: Without dead ends: 308 [2023-11-26 12:00:09,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:09,980 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 61 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 704 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-26 12:00:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 296. [2023-11-26 12:00:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 230 states have (on average 1.5782608695652174) internal successors, (363), 281 states have internal predecessors, (363), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:00:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 383 transitions. [2023-11-26 12:00:09,989 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 383 transitions. Word has length 21 [2023-11-26 12:00:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:09,990 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 383 transitions. [2023-11-26 12:00:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 383 transitions. [2023-11-26 12:00:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 12:00:09,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:09,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:09,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 12:00:09,991 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:09,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash 697659121, now seen corresponding path program 1 times [2023-11-26 12:00:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877781372] [2023-11-26 12:00:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:09,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:00:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:00:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:10,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877781372] [2023-11-26 12:00:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877781372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575256799] [2023-11-26 12:00:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:10,021 INFO L87 Difference]: Start difference. First operand 296 states and 383 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:10,072 INFO L93 Difference]: Finished difference Result 300 states and 386 transitions. [2023-11-26 12:00:10,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:10,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-26 12:00:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:10,074 INFO L225 Difference]: With dead ends: 300 [2023-11-26 12:00:10,074 INFO L226 Difference]: Without dead ends: 299 [2023-11-26 12:00:10,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:10,075 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:10,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 248 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-26 12:00:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2023-11-26 12:00:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 233 states have (on average 1.5665236051502145) internal successors, (365), 284 states have internal predecessors, (365), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-26 12:00:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 385 transitions. [2023-11-26 12:00:10,084 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 385 transitions. Word has length 30 [2023-11-26 12:00:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:10,085 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 385 transitions. [2023-11-26 12:00:10,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 385 transitions. [2023-11-26 12:00:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 12:00:10,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:10,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 12:00:10,086 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:10,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1603163469, now seen corresponding path program 1 times [2023-11-26 12:00:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188575053] [2023-11-26 12:00:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:00:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:10,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:10,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188575053] [2023-11-26 12:00:10,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188575053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:10,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:10,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 12:00:10,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745428542] [2023-11-26 12:00:10,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:10,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:10,481 INFO L87 Difference]: Start difference. First operand 299 states and 385 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:10,768 INFO L93 Difference]: Finished difference Result 248 states and 311 transitions. [2023-11-26 12:00:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:10,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-26 12:00:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:10,773 INFO L225 Difference]: With dead ends: 248 [2023-11-26 12:00:10,773 INFO L226 Difference]: Without dead ends: 248 [2023-11-26 12:00:10,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:00:10,774 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 32 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:10,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 552 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:10,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-26 12:00:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2023-11-26 12:00:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 166 states have (on average 1.644578313253012) internal successors, (273), 216 states have internal predecessors, (273), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:00:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2023-11-26 12:00:10,792 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 30 [2023-11-26 12:00:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:10,793 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2023-11-26 12:00:10,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2023-11-26 12:00:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 12:00:10,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:10,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 12:00:10,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:10,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1548019960, now seen corresponding path program 1 times [2023-11-26 12:00:10,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:10,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804798244] [2023-11-26 12:00:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:10,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 12:00:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:00:10,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:10,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804798244] [2023-11-26 12:00:10,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804798244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:00:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841342484] [2023-11-26 12:00:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:00:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:00:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:10,871 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:10,903 INFO L93 Difference]: Finished difference Result 228 states and 287 transitions. [2023-11-26 12:00:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:00:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-11-26 12:00:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:10,906 INFO L225 Difference]: With dead ends: 228 [2023-11-26 12:00:10,906 INFO L226 Difference]: Without dead ends: 228 [2023-11-26 12:00:10,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:00:10,907 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:10,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 249 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:00:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-26 12:00:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2023-11-26 12:00:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 168 states have (on average 1.6369047619047619) internal successors, (275), 218 states have internal predecessors, (275), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:00:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 287 transitions. [2023-11-26 12:00:10,914 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 287 transitions. Word has length 36 [2023-11-26 12:00:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:10,915 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 287 transitions. [2023-11-26 12:00:10,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 287 transitions. [2023-11-26 12:00:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 12:00:10,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:10,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:10,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-26 12:00:10,916 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:10,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:10,917 INFO L85 PathProgramCache]: Analyzing trace with hash -738673334, now seen corresponding path program 1 times [2023-11-26 12:00:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:10,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187104917] [2023-11-26 12:00:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:10,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:11,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-26 12:00:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:11,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:11,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187104917] [2023-11-26 12:00:11,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187104917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326815337] [2023-11-26 12:00:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:11,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:11,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:11,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:11,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:00:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:11,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 12:00:11,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:11,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:12,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:12,148 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 19 treesize of output 23 [2023-11-26 12:00:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:00:12,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326815337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:12,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:12,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2023-11-26 12:00:12,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447943807] [2023-11-26 12:00:12,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:12,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:00:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:00:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:00:12,388 INFO L87 Difference]: Start difference. First operand 228 states and 287 transitions. Second operand has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:00:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:12,671 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2023-11-26 12:00:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:00:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-11-26 12:00:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:12,673 INFO L225 Difference]: With dead ends: 222 [2023-11-26 12:00:12,673 INFO L226 Difference]: Without dead ends: 222 [2023-11-26 12:00:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:00:12,675 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 404 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:12,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 590 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-26 12:00:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2023-11-26 12:00:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 160 states have (on average 1.58125) internal successors, (253), 204 states have internal predecessors, (253), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:00:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2023-11-26 12:00:12,682 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 36 [2023-11-26 12:00:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:12,682 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2023-11-26 12:00:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 12:00:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2023-11-26 12:00:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 12:00:12,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:12,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:12,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:12,890 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:12,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2037362400, now seen corresponding path program 1 times [2023-11-26 12:00:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:12,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534979042] [2023-11-26 12:00:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 12:00:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534979042] [2023-11-26 12:00:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534979042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790749460] [2023-11-26 12:00:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:13,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:13,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:00:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:00:13,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:13,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790749460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:13,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:13,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-26 12:00:13,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387789490] [2023-11-26 12:00:13,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:13,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:00:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:00:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:00:13,303 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 12:00:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:13,479 INFO L93 Difference]: Finished difference Result 770 states and 981 transitions. [2023-11-26 12:00:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:00:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2023-11-26 12:00:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:13,484 INFO L225 Difference]: With dead ends: 770 [2023-11-26 12:00:13,484 INFO L226 Difference]: Without dead ends: 770 [2023-11-26 12:00:13,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:13,485 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 570 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:13,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 856 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-26 12:00:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 352. [2023-11-26 12:00:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 292 states have (on average 1.5034246575342465) internal successors, (439), 336 states have internal predecessors, (439), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 12:00:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 463 transitions. [2023-11-26 12:00:13,501 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 463 transitions. Word has length 39 [2023-11-26 12:00:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:13,502 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 463 transitions. [2023-11-26 12:00:13,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-26 12:00:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 463 transitions. [2023-11-26 12:00:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 12:00:13,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:13,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:13,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 12:00:13,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:13,709 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:13,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1336297822, now seen corresponding path program 1 times [2023-11-26 12:00:13,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:13,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049804469] [2023-11-26 12:00:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:13,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-26 12:00:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:13,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:13,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049804469] [2023-11-26 12:00:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049804469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:13,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829577903] [2023-11-26 12:00:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:13,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:13,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:13,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:14,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:00:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:14,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 12:00:14,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:14,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:14,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829577903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-11-26 12:00:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729008701] [2023-11-26 12:00:14,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:14,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:14,456 INFO L87 Difference]: Start difference. First operand 352 states and 463 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:14,643 INFO L93 Difference]: Finished difference Result 349 states and 457 transitions. [2023-11-26 12:00:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:00:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-11-26 12:00:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:14,646 INFO L225 Difference]: With dead ends: 349 [2023-11-26 12:00:14,646 INFO L226 Difference]: Without dead ends: 349 [2023-11-26 12:00:14,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:14,647 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 153 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:14,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 274 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-26 12:00:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2023-11-26 12:00:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 292 states have (on average 1.4828767123287672) internal successors, (433), 333 states have internal predecessors, (433), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 12:00:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 457 transitions. [2023-11-26 12:00:14,658 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 457 transitions. Word has length 39 [2023-11-26 12:00:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:14,659 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 457 transitions. [2023-11-26 12:00:14,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 457 transitions. [2023-11-26 12:00:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:00:14,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:14,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:14,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:14,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 12:00:14,866 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:14,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1707168410, now seen corresponding path program 1 times [2023-11-26 12:00:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771360595] [2023-11-26 12:00:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:14,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771360595] [2023-11-26 12:00:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771360595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315148585] [2023-11-26 12:00:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:14,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:14,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:00:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:15,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:00:15,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:15,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:00:15,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315148585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:00:15,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:00:15,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2023-11-26 12:00:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118160940] [2023-11-26 12:00:15,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:00:15,233 INFO L87 Difference]: Start difference. First operand 349 states and 457 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:00:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:15,415 INFO L93 Difference]: Finished difference Result 1245 states and 1614 transitions. [2023-11-26 12:00:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:00:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-11-26 12:00:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:15,423 INFO L225 Difference]: With dead ends: 1245 [2023-11-26 12:00:15,423 INFO L226 Difference]: Without dead ends: 1245 [2023-11-26 12:00:15,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:00:15,424 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 542 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:15,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 655 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2023-11-26 12:00:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 819. [2023-11-26 12:00:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 737 states have (on average 1.4640434192673) internal successors, (1079), 778 states have internal predecessors, (1079), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-26 12:00:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1141 transitions. [2023-11-26 12:00:15,464 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1141 transitions. Word has length 40 [2023-11-26 12:00:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:15,465 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1141 transitions. [2023-11-26 12:00:15,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:00:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1141 transitions. [2023-11-26 12:00:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:00:15,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:15,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:15,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 12:00:15,673 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:15,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1709015452, now seen corresponding path program 1 times [2023-11-26 12:00:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890242221] [2023-11-26 12:00:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:15,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:15,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890242221] [2023-11-26 12:00:15,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890242221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:15,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416863303] [2023-11-26 12:00:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:15,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:15,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:15,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:15,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:00:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:16,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:00:16,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:16,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416863303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:16,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-26 12:00:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140359255] [2023-11-26 12:00:16,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:16,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:00:16,369 INFO L87 Difference]: Start difference. First operand 819 states and 1141 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:16,532 INFO L93 Difference]: Finished difference Result 835 states and 1157 transitions. [2023-11-26 12:00:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:00:16,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-11-26 12:00:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:16,537 INFO L225 Difference]: With dead ends: 835 [2023-11-26 12:00:16,538 INFO L226 Difference]: Without dead ends: 835 [2023-11-26 12:00:16,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:16,539 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 186 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:16,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 231 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:00:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-11-26 12:00:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 821. [2023-11-26 12:00:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 739 states have (on average 1.4641407307171854) internal successors, (1082), 780 states have internal predecessors, (1082), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-26 12:00:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1144 transitions. [2023-11-26 12:00:16,562 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1144 transitions. Word has length 40 [2023-11-26 12:00:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1144 transitions. [2023-11-26 12:00:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1144 transitions. [2023-11-26 12:00:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:00:16,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:16,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:16,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:16,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 12:00:16,770 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:16,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1709015390, now seen corresponding path program 1 times [2023-11-26 12:00:16,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:16,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041098570] [2023-11-26 12:00:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:16,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:17,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041098570] [2023-11-26 12:00:17,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041098570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:17,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626112704] [2023-11-26 12:00:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:17,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:17,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:00:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:17,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:00:17,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:17,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:00:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626112704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:17,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:00:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-26 12:00:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102110666] [2023-11-26 12:00:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:00:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:00:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:00:17,467 INFO L87 Difference]: Start difference. First operand 821 states and 1144 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:17,655 INFO L93 Difference]: Finished difference Result 834 states and 1155 transitions. [2023-11-26 12:00:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:00:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-11-26 12:00:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:17,661 INFO L225 Difference]: With dead ends: 834 [2023-11-26 12:00:17,661 INFO L226 Difference]: Without dead ends: 834 [2023-11-26 12:00:17,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:00:17,663 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 247 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:17,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 334 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-26 12:00:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 818. [2023-11-26 12:00:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 737 states have (on average 1.4613297150610582) internal successors, (1077), 777 states have internal predecessors, (1077), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-26 12:00:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1139 transitions. [2023-11-26 12:00:17,693 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1139 transitions. Word has length 40 [2023-11-26 12:00:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:17,694 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1139 transitions. [2023-11-26 12:00:17,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1139 transitions. [2023-11-26 12:00:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-26 12:00:17,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:17,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:17,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:17,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 12:00:17,909 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:17,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1686295858, now seen corresponding path program 1 times [2023-11-26 12:00:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:17,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070625027] [2023-11-26 12:00:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:19,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070625027] [2023-11-26 12:00:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070625027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:19,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:19,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-26 12:00:19,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759378914] [2023-11-26 12:00:19,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:19,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:00:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:00:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:00:19,090 INFO L87 Difference]: Start difference. First operand 818 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:19,948 INFO L93 Difference]: Finished difference Result 837 states and 1160 transitions. [2023-11-26 12:00:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:00:19,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-26 12:00:19,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:19,954 INFO L225 Difference]: With dead ends: 837 [2023-11-26 12:00:19,954 INFO L226 Difference]: Without dead ends: 837 [2023-11-26 12:00:19,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:00:19,955 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 49 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:19,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1021 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:00:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2023-11-26 12:00:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 832. [2023-11-26 12:00:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 751 states have (on average 1.455392809587217) internal successors, (1093), 791 states have internal predecessors, (1093), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-26 12:00:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1155 transitions. [2023-11-26 12:00:19,986 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1155 transitions. Word has length 42 [2023-11-26 12:00:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:19,987 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1155 transitions. [2023-11-26 12:00:19,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1155 transitions. [2023-11-26 12:00:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:19,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:19,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:19,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-26 12:00:19,989 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:19,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash -987579494, now seen corresponding path program 1 times [2023-11-26 12:00:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763643938] [2023-11-26 12:00:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:19,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:21,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:21,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:21,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763643938] [2023-11-26 12:00:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763643938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:00:21,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:00:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-26 12:00:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74450408] [2023-11-26 12:00:21,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:00:21,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 12:00:21,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 12:00:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:00:21,145 INFO L87 Difference]: Start difference. First operand 832 states and 1155 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:21,659 INFO L93 Difference]: Finished difference Result 840 states and 1162 transitions. [2023-11-26 12:00:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:00:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-11-26 12:00:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:21,665 INFO L225 Difference]: With dead ends: 840 [2023-11-26 12:00:21,665 INFO L226 Difference]: Without dead ends: 840 [2023-11-26 12:00:21,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-11-26 12:00:21,666 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 50 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:21,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 538 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:00:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-26 12:00:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 832. [2023-11-26 12:00:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 751 states have (on average 1.4540612516644473) internal successors, (1092), 791 states have internal predecessors, (1092), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-26 12:00:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1154 transitions. [2023-11-26 12:00:21,693 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1154 transitions. Word has length 43 [2023-11-26 12:00:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:21,693 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1154 transitions. [2023-11-26 12:00:21,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 12:00:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1154 transitions. [2023-11-26 12:00:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:21,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:21,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-26 12:00:21,695 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:21,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1317263214, now seen corresponding path program 1 times [2023-11-26 12:00:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125907398] [2023-11-26 12:00:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:23,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125907398] [2023-11-26 12:00:23,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125907398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:23,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325122535] [2023-11-26 12:00:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:23,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:23,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:23,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:23,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:00:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:23,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-26 12:00:23,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:23,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 12:00:23,904 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-26 12:00:23,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-11-26 12:00:23,927 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-26 12:00:23,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-26 12:00:24,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-11-26 12:00:24,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2023-11-26 12:00:24,598 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 28 treesize of output 12 [2023-11-26 12:00:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:24,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:25,503 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 77 treesize of output 54 [2023-11-26 12:00:25,517 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 77 treesize of output 54 [2023-11-26 12:00:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325122535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:25,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:00:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2023-11-26 12:00:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014222167] [2023-11-26 12:00:25,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:00:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 12:00:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:00:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 12:00:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2023-11-26 12:00:25,782 INFO L87 Difference]: Start difference. First operand 832 states and 1154 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:00:27,742 INFO L93 Difference]: Finished difference Result 1052 states and 1440 transitions. [2023-11-26 12:00:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:00:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-11-26 12:00:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:00:27,753 INFO L225 Difference]: With dead ends: 1052 [2023-11-26 12:00:27,754 INFO L226 Difference]: Without dead ends: 1052 [2023-11-26 12:00:27,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2023-11-26 12:00:27,757 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 271 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:00:27,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1398 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 12:00:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-26 12:00:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 913. [2023-11-26 12:00:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 823 states have (on average 1.4434993924665858) internal successors, (1188), 866 states have internal predecessors, (1188), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-26 12:00:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1264 transitions. [2023-11-26 12:00:27,789 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1264 transitions. Word has length 43 [2023-11-26 12:00:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:00:27,789 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1264 transitions. [2023-11-26 12:00:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:00:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1264 transitions. [2023-11-26 12:00:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 12:00:27,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:00:27,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:00:27,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:00:27,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-26 12:00:27,997 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-26 12:00:27,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:00:27,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1317263213, now seen corresponding path program 1 times [2023-11-26 12:00:27,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:00:27,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468730007] [2023-11-26 12:00:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:27,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:00:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-26 12:00:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:00:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468730007] [2023-11-26 12:00:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468730007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:00:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931660168] [2023-11-26 12:00:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:00:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:00:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:00:29,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:00:29,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72e795ab-7c12-49d8-8593-1172031089f7/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:00:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:00:30,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-26 12:00:30,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:00:30,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 12:00:30,708 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-26 12:00:30,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-11-26 12:00:30,725 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 12:00:30,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-11-26 12:00:31,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-26 12:00:31,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-26 12:00:31,588 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 36 treesize of output 16 [2023-11-26 12:00:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:00:31,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:00:33,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:00:33,624 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 365 treesize of output 370