./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.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_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya --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 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:14:35,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:14:35,780 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:14:35,784 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:14:35,785 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:14:35,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:14:35,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:14:35,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:14:35,814 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:14:35,814 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:14:35,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:14:35,815 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:14:35,816 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:14:35,817 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:14:35,817 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:14:35,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:14:35,818 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:14:35,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:14:35,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:14:35,820 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:14:35,821 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:14:35,821 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:14:35,822 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:14:35,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:14:35,823 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:14:35,823 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:14:35,824 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:14:35,824 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:14:35,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:14:35,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:14:35,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:14:35,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:14:35,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:14:35,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:14:35,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:14:35,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:14:35,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:14:35,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:14:35,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:14:35,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:14:35,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:14:35,828 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_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2023-11-29 00:14:36,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:14:36,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:14:36,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:14:36,076 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:14:36,076 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:14:36,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2023-11-29 00:14:38,831 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:14:39,033 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:14:39,034 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2023-11-29 00:14:39,048 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/data/100c66b93/665eaea01623424ba54c4d76b91dfbea/FLAGb09bad8cd [2023-11-29 00:14:39,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/data/100c66b93/665eaea01623424ba54c4d76b91dfbea [2023-11-29 00:14:39,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:14:39,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:14:39,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:14:39,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:14:39,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:14:39,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0a1961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39, skipping insertion in model container [2023-11-29 00:14:39,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:14:39,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:14:39,365 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:14:39,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:14:39,425 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:14:39,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39 WrapperNode [2023-11-29 00:14:39,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:14:39,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:14:39,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:14:39,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:14:39,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,466 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2023-11-29 00:14:39,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:14:39,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:14:39,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:14:39,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:14:39,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,494 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [3, 5]. 63 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [2, 4]. [2023-11-29 00:14:39,494 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:14:39,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:14:39,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:14:39,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:14:39,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (1/1) ... [2023-11-29 00:14:39,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:14:39,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:39,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:14:39,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:14:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:14:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:14:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:14:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:14:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:14:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:14:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:14:39,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:14:39,699 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:14:39,701 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:14:39,884 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:14:39,920 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:14:39,920 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 00:14:39,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:14:39 BoogieIcfgContainer [2023-11-29 00:14:39,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:14:39,924 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:14:39,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:14:39,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:14:39,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:14:39" (1/3) ... [2023-11-29 00:14:39,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a877c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:14:39, skipping insertion in model container [2023-11-29 00:14:39,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:14:39" (2/3) ... [2023-11-29 00:14:39,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a877c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:14:39, skipping insertion in model container [2023-11-29 00:14:39,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:14:39" (3/3) ... [2023-11-29 00:14:39,930 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2023-11-29 00:14:39,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:14:39,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-29 00:14:39,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:14:39,998 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;@1ba5345b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:14:39,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-29 00:14:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 41 states have internal predecessors, (55), 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) [2023-11-29 00:14:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:14:40,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:40,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:14:40,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 376546795, now seen corresponding path program 1 times [2023-11-29 00:14:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419143388] [2023-11-29 00:14:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:40,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:40,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419143388] [2023-11-29 00:14:40,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419143388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:40,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:40,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:14:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940201111] [2023-11-29 00:14:40,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:40,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:14:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:14:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:14:40,217 INFO L87 Difference]: Start difference. First operand has 42 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 41 states have internal predecessors, (55), 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-29 00:14:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:40,275 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-11-29 00:14:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:14:40,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-29 00:14:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:40,284 INFO L225 Difference]: With dead ends: 43 [2023-11-29 00:14:40,284 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 00:14:40,286 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 [2023-11-29 00:14:40,289 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:40,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 00:14:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-29 00:14:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 40 states have internal predecessors, (49), 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) [2023-11-29 00:14:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-29 00:14:40,317 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 6 [2023-11-29 00:14:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:40,318 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-29 00:14:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-29 00:14:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-29 00:14:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:14:40,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:40,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:40,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:14:40,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:40,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1211952045, now seen corresponding path program 1 times [2023-11-29 00:14:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:40,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882922808] [2023-11-29 00:14:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:40,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:40,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882922808] [2023-11-29 00:14:40,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882922808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:40,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:40,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:14:40,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810694951] [2023-11-29 00:14:40,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:40,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:40,446 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-29 00:14:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:40,539 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-11-29 00:14:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2023-11-29 00:14:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:40,541 INFO L225 Difference]: With dead ends: 44 [2023-11-29 00:14:40,541 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 00:14:40,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:40,543 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 00:14:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-29 00:14:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 2.0) internal successors, (48), 40 states have internal predecessors, (48), 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) [2023-11-29 00:14:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-29 00:14:40,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 7 [2023-11-29 00:14:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:40,550 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-29 00:14:40,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-29 00:14:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-29 00:14:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:14:40,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:40,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:40,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:14:40,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:40,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1154693743, now seen corresponding path program 1 times [2023-11-29 00:14:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:40,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871525507] [2023-11-29 00:14:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:40,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871525507] [2023-11-29 00:14:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871525507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:40,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:40,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:14:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50553048] [2023-11-29 00:14:40,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:40,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:14:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:14:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:14:40,688 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2023-11-29 00:14:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:40,723 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-29 00:14:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:14:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2023-11-29 00:14:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:40,725 INFO L225 Difference]: With dead ends: 39 [2023-11-29 00:14:40,725 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 00:14:40,725 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 [2023-11-29 00:14:40,727 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:40,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 00:14:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 00:14:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 38 states have internal predecessors, (46), 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) [2023-11-29 00:14:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-11-29 00:14:40,733 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 7 [2023-11-29 00:14:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:40,734 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-11-29 00:14:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2023-11-29 00:14:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-11-29 00:14:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:14:40,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:40,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:14:40,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:40,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1154693742, now seen corresponding path program 1 times [2023-11-29 00:14:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297344299] [2023-11-29 00:14:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:41,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:41,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297344299] [2023-11-29 00:14:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297344299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:14:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564531034] [2023-11-29 00:14:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:14:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:14:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:41,030 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2023-11-29 00:14:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:41,185 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2023-11-29 00:14:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:14:41,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 [2023-11-29 00:14:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:41,186 INFO L225 Difference]: With dead ends: 42 [2023-11-29 00:14:41,187 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 00:14:41,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:14:41,188 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:41,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 70 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 00:14:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-11-29 00:14:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 40 states have internal predecessors, (49), 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) [2023-11-29 00:14:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-29 00:14:41,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 7 [2023-11-29 00:14:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-29 00:14:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2023-11-29 00:14:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-29 00:14:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:14:41,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:41,196 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:14:41,196 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:41,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:41,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1559034223, now seen corresponding path program 1 times [2023-11-29 00:14:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:41,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513579497] [2023-11-29 00:14:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:41,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:41,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513579497] [2023-11-29 00:14:41,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513579497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246452671] [2023-11-29 00:14:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:41,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:41,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:41,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:14:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:41,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:14:41,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:41,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:14:41,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 00:14:41,618 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 10 treesize of output 8 [2023-11-29 00:14:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:41,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:14:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:41,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246452671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:41,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:41,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-29 00:14:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821258578] [2023-11-29 00:14:41,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:14:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:14:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:14:41,986 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2023-11-29 00:14:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:42,215 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-11-29 00:14:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:14:42,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2023-11-29 00:14:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:42,218 INFO L225 Difference]: With dead ends: 43 [2023-11-29 00:14:42,218 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 00:14:42,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:14:42,220 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:42,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 100 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 00:14:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-29 00:14:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.875) internal successors, (45), 37 states have internal predecessors, (45), 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) [2023-11-29 00:14:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-29 00:14:42,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2023-11-29 00:14:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:42,225 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-29 00:14:42,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2023-11-29 00:14:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-29 00:14:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:14:42,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:42,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:42,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 00:14:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:42,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:42,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1559174915, now seen corresponding path program 1 times [2023-11-29 00:14:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714667237] [2023-11-29 00:14:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:42,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:42,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714667237] [2023-11-29 00:14:42,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714667237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:42,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:42,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684471091] [2023-11-29 00:14:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:14:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:14:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:42,470 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2023-11-29 00:14:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:42,512 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-11-29 00:14:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:14:42,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2023-11-29 00:14:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:42,513 INFO L225 Difference]: With dead ends: 70 [2023-11-29 00:14:42,513 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 00:14:42,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:42,515 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:42,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 00:14:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2023-11-29 00:14:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 43 states have internal predecessors, (53), 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) [2023-11-29 00:14:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-11-29 00:14:42,520 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 9 [2023-11-29 00:14:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:42,520 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-11-29 00:14:42,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2023-11-29 00:14:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-11-29 00:14:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:14:42,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:42,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:42,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:14:42,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:42,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 215832447, now seen corresponding path program 1 times [2023-11-29 00:14:42,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694334551] [2023-11-29 00:14:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:42,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:42,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694334551] [2023-11-29 00:14:42,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694334551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:42,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:42,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:14:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134758608] [2023-11-29 00:14:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:42,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:14:42,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:14:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:14:42,558 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-29 00:14:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:42,587 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-11-29 00:14:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:14:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-11-29 00:14:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:42,588 INFO L225 Difference]: With dead ends: 42 [2023-11-29 00:14:42,588 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 00:14:42,589 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 [2023-11-29 00:14:42,589 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:42,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 00:14:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-29 00:14:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.7) internal successors, (51), 41 states have internal predecessors, (51), 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) [2023-11-29 00:14:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2023-11-29 00:14:42,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 9 [2023-11-29 00:14:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:42,594 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2023-11-29 00:14:42,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-29 00:14:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2023-11-29 00:14:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 00:14:42,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:42,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:42,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:14:42,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:42,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash 215832448, now seen corresponding path program 1 times [2023-11-29 00:14:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:42,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504523619] [2023-11-29 00:14:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:42,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:42,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504523619] [2023-11-29 00:14:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504523619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:42,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:42,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:14:42,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495603684] [2023-11-29 00:14:42,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:42,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:42,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:42,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:42,647 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2023-11-29 00:14:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:42,702 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-11-29 00:14:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:42,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 [2023-11-29 00:14:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:42,704 INFO L225 Difference]: With dead ends: 46 [2023-11-29 00:14:42,704 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 00:14:42,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:42,705 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:42,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 57 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 00:14:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-11-29 00:14:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.65625) internal successors, (53), 43 states have internal predecessors, (53), 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) [2023-11-29 00:14:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-11-29 00:14:42,709 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 9 [2023-11-29 00:14:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:42,709 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-11-29 00:14:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2023-11-29 00:14:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-11-29 00:14:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 00:14:42,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:42,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:14:42,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1391705151, now seen corresponding path program 1 times [2023-11-29 00:14:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008438510] [2023-11-29 00:14:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:42,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008438510] [2023-11-29 00:14:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008438510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589284543] [2023-11-29 00:14:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:42,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:42,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:42,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:42,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:14:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:42,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:14:42,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:42,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589284543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 00:14:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069174964] [2023-11-29 00:14:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:43,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:14:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:14:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:14:43,010 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-11-29 00:14:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:43,221 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-11-29 00:14:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:14:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 11 [2023-11-29 00:14:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:43,222 INFO L225 Difference]: With dead ends: 78 [2023-11-29 00:14:43,222 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 00:14:43,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:14:43,223 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:43,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 195 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 00:14:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2023-11-29 00:14:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 45 states have internal predecessors, (56), 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) [2023-11-29 00:14:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-11-29 00:14:43,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 11 [2023-11-29 00:14:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:43,228 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-11-29 00:14:43,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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) [2023-11-29 00:14:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-11-29 00:14:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:14:43,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:43,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:43,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:14:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:43,434 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 586212090, now seen corresponding path program 1 times [2023-11-29 00:14:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544674879] [2023-11-29 00:14:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:43,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544674879] [2023-11-29 00:14:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544674879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134283372] [2023-11-29 00:14:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:43,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:43,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:43,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:14:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:43,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:14:43,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:43,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:14:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134283372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:14:43,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2023-11-29 00:14:43,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938678076] [2023-11-29 00:14:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:14:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:14:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:14:43,783 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-11-29 00:14:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:43,890 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2023-11-29 00:14:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:14:43,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2023-11-29 00:14:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:43,891 INFO L225 Difference]: With dead ends: 45 [2023-11-29 00:14:43,891 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 00:14:43,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:14:43,892 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:43,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:43,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 00:14:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 00:14:43,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 44 states have internal predecessors, (55), 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) [2023-11-29 00:14:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-11-29 00:14:43,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2023-11-29 00:14:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:43,897 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-11-29 00:14:43,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-11-29 00:14:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-11-29 00:14:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:14:43,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:43,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:43,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:14:44,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:14:44,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:44,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 992705611, now seen corresponding path program 1 times [2023-11-29 00:14:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:44,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109865759] [2023-11-29 00:14:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:44,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:44,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109865759] [2023-11-29 00:14:44,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109865759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:44,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:44,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:14:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224384819] [2023-11-29 00:14:44,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:14:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:44,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:14:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:44,237 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-29 00:14:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:44,281 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-11-29 00:14:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:14:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2023-11-29 00:14:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:44,282 INFO L225 Difference]: With dead ends: 70 [2023-11-29 00:14:44,282 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 00:14:44,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:44,283 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:44,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 00:14:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2023-11-29 00:14:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 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) [2023-11-29 00:14:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-11-29 00:14:44,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 13 [2023-11-29 00:14:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:44,287 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-11-29 00:14:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-29 00:14:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-11-29 00:14:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:14:44,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:44,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:44,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:14:44,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:44,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:44,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1828973886, now seen corresponding path program 2 times [2023-11-29 00:14:44,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:44,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546123859] [2023-11-29 00:14:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:44,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546123859] [2023-11-29 00:14:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546123859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:44,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881129490] [2023-11-29 00:14:44,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:14:44,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:44,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:44,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:44,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:14:44,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 00:14:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:14:44,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:14:44,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:44,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:14:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:14:44,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:14:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881129490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:44,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:14:44,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-11-29 00:14:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922056414] [2023-11-29 00:14:44,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:44,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:14:44,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:14:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:14:44,839 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-29 00:14:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:44,918 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-11-29 00:14:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:14:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2023-11-29 00:14:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:44,919 INFO L225 Difference]: With dead ends: 49 [2023-11-29 00:14:44,919 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 00:14:44,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:14:44,920 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:44,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 56 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 00:14:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 00:14:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 48 states have internal predecessors, (59), 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) [2023-11-29 00:14:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-29 00:14:44,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2023-11-29 00:14:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:44,924 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-29 00:14:44,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2023-11-29 00:14:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-29 00:14:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:14:44,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:44,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:44,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:14:45,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:45,130 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:45,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:45,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1693770189, now seen corresponding path program 1 times [2023-11-29 00:14:45,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:45,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184428386] [2023-11-29 00:14:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:45,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184428386] [2023-11-29 00:14:45,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184428386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:45,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:45,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:14:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701165912] [2023-11-29 00:14:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:45,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:45,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:45,283 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-29 00:14:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:45,318 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-29 00:14:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2023-11-29 00:14:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:45,320 INFO L225 Difference]: With dead ends: 48 [2023-11-29 00:14:45,320 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 00:14:45,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:45,321 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:45,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 00:14:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-11-29 00:14:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 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) [2023-11-29 00:14:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2023-11-29 00:14:45,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 13 [2023-11-29 00:14:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:45,324 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2023-11-29 00:14:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-29 00:14:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2023-11-29 00:14:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 00:14:45,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:45,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:14:45,326 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:45,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash 507414319, now seen corresponding path program 1 times [2023-11-29 00:14:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:45,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392986998] [2023-11-29 00:14:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392986998] [2023-11-29 00:14:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392986998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:45,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:45,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185783746] [2023-11-29 00:14:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:45,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:45,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:45,410 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-29 00:14:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:45,467 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-11-29 00:14:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-29 00:14:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:45,469 INFO L225 Difference]: With dead ends: 40 [2023-11-29 00:14:45,469 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 00:14:45,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:45,470 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:45,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 00:14:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-29 00:14:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 39 states have internal predecessors, (50), 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) [2023-11-29 00:14:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-29 00:14:45,473 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2023-11-29 00:14:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:45,473 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-29 00:14:45,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-29 00:14:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-29 00:14:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 00:14:45,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:45,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:14:45,474 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:45,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 507414320, now seen corresponding path program 1 times [2023-11-29 00:14:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:45,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548192040] [2023-11-29 00:14:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548192040] [2023-11-29 00:14:45,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548192040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317188356] [2023-11-29 00:14:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:45,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:45,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:14:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:45,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:14:45,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:45,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:45,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:14:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:45,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317188356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:45,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:45,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 00:14:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570614864] [2023-11-29 00:14:45,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:45,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:14:45,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:14:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:14:45,841 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-11-29 00:14:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:45,980 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-11-29 00:14:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:14:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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 15 [2023-11-29 00:14:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:45,981 INFO L225 Difference]: With dead ends: 56 [2023-11-29 00:14:45,981 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 00:14:45,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:14:45,982 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:45,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 81 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 00:14:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2023-11-29 00:14:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 44 states have internal predecessors, (57), 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) [2023-11-29 00:14:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-11-29 00:14:45,985 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 15 [2023-11-29 00:14:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:45,985 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-11-29 00:14:45,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-11-29 00:14:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-11-29 00:14:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:14:45,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:45,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:45,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:14:46,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:14:46,192 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:46,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1449980409, now seen corresponding path program 1 times [2023-11-29 00:14:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:46,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729911650] [2023-11-29 00:14:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729911650] [2023-11-29 00:14:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729911650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224903426] [2023-11-29 00:14:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:46,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:14:46,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:14:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:46,264 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 00:14:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:46,305 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-11-29 00:14:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:14:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2023-11-29 00:14:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:46,306 INFO L225 Difference]: With dead ends: 90 [2023-11-29 00:14:46,306 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 00:14:46,307 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 [2023-11-29 00:14:46,307 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:46,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 87 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 00:14:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 64. [2023-11-29 00:14:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 63 states have internal predecessors, (80), 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) [2023-11-29 00:14:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-11-29 00:14:46,311 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 16 [2023-11-29 00:14:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:46,311 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-11-29 00:14:46,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 00:14:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-11-29 00:14:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:14:46,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:46,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 00:14:46,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:46,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2036786423, now seen corresponding path program 1 times [2023-11-29 00:14:46,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:46,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529950758] [2023-11-29 00:14:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:46,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529950758] [2023-11-29 00:14:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529950758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:46,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:46,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:46,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229904673] [2023-11-29 00:14:46,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:46,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:46,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:46,391 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 00:14:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:46,423 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-11-29 00:14:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2023-11-29 00:14:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:46,424 INFO L225 Difference]: With dead ends: 69 [2023-11-29 00:14:46,424 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 00:14:46,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:14:46,425 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:46,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 00:14:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2023-11-29 00:14:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.435897435897436) internal successors, (56), 44 states have internal predecessors, (56), 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) [2023-11-29 00:14:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-11-29 00:14:46,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 16 [2023-11-29 00:14:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:46,428 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-11-29 00:14:46,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 00:14:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-11-29 00:14:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 00:14:46,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:46,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:46,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 00:14:46,429 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:46,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2001109495, now seen corresponding path program 1 times [2023-11-29 00:14:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560131753] [2023-11-29 00:14:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:46,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560131753] [2023-11-29 00:14:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560131753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868142859] [2023-11-29 00:14:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:46,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:46,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:46,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:14:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:46,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:14:46,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:47,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:14:47,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:14:47,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:14:47,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-11-29 00:14:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:47,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:47,478 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 16 treesize of output 14 [2023-11-29 00:14:47,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 00:14:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:47,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868142859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:47,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2023-11-29 00:14:47,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364488598] [2023-11-29 00:14:47,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:47,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:14:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:14:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:14:47,820 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 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) [2023-11-29 00:14:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:49,158 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2023-11-29 00:14:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:14:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 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 17 [2023-11-29 00:14:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:49,159 INFO L225 Difference]: With dead ends: 109 [2023-11-29 00:14:49,159 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 00:14:49,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=404, Invalid=1488, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:14:49,161 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 645 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:49,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 252 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:14:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 00:14:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2023-11-29 00:14:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 61 states have internal predecessors, (79), 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) [2023-11-29 00:14:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-29 00:14:49,164 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 17 [2023-11-29 00:14:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:49,165 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-29 00:14:49,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 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) [2023-11-29 00:14:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-29 00:14:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 00:14:49,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:49,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:49,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:14:49,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:14:49,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:49,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1904853691, now seen corresponding path program 1 times [2023-11-29 00:14:49,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:49,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476874836] [2023-11-29 00:14:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:49,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:49,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476874836] [2023-11-29 00:14:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476874836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:49,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:49,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:14:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886149821] [2023-11-29 00:14:49,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:49,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:49,427 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-11-29 00:14:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:49,470 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2023-11-29 00:14:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2023-11-29 00:14:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:49,471 INFO L225 Difference]: With dead ends: 61 [2023-11-29 00:14:49,472 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 00:14:49,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:49,472 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:49,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 00:14:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 00:14:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 60 states have internal predecessors, (76), 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) [2023-11-29 00:14:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2023-11-29 00:14:49,475 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 18 [2023-11-29 00:14:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:49,475 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2023-11-29 00:14:49,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-11-29 00:14:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2023-11-29 00:14:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 00:14:49,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:49,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:49,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 00:14:49,477 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:49,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:49,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1904853690, now seen corresponding path program 1 times [2023-11-29 00:14:49,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:49,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113911252] [2023-11-29 00:14:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:49,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113911252] [2023-11-29 00:14:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113911252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:49,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:14:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091857539] [2023-11-29 00:14:49,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:14:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:14:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:49,672 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-11-29 00:14:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:49,783 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2023-11-29 00:14:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:14:49,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2023-11-29 00:14:49,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:49,784 INFO L225 Difference]: With dead ends: 65 [2023-11-29 00:14:49,784 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 00:14:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:14:49,785 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:49,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:14:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 00:14:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-29 00:14:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 62 states have internal predecessors, (77), 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) [2023-11-29 00:14:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2023-11-29 00:14:49,788 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 18 [2023-11-29 00:14:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:49,788 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2023-11-29 00:14:49,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-11-29 00:14:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2023-11-29 00:14:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 00:14:49,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:49,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:49,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 00:14:49,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:49,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -715399903, now seen corresponding path program 2 times [2023-11-29 00:14:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091756754] [2023-11-29 00:14:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:49,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:50,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091756754] [2023-11-29 00:14:50,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091756754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752338263] [2023-11-29 00:14:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:14:50,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:50,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:50,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:14:50,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:14:50,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:14:50,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:14:50,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:50,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:14:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:14:50,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:14:50,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-11-29 00:14:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:50,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:50,870 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 18 treesize of output 16 [2023-11-29 00:14:50,873 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 26 treesize of output 22 [2023-11-29 00:14:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:51,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752338263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:51,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:51,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2023-11-29 00:14:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836092538] [2023-11-29 00:14:51,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 00:14:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 00:14:51,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:14:51,163 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2023-11-29 00:14:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:53,300 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2023-11-29 00:14:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:14:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 21 [2023-11-29 00:14:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:53,303 INFO L225 Difference]: With dead ends: 265 [2023-11-29 00:14:53,303 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 00:14:53,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=511, Invalid=3779, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 00:14:53,306 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 533 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:53,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 972 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:14:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 00:14:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 95. [2023-11-29 00:14:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 94 states have internal predecessors, (119), 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) [2023-11-29 00:14:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2023-11-29 00:14:53,311 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 21 [2023-11-29 00:14:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:53,311 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2023-11-29 00:14:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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) [2023-11-29 00:14:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2023-11-29 00:14:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:14:53,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:53,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:53,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:14:53,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:14:53,515 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:53,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1673626827, now seen corresponding path program 1 times [2023-11-29 00:14:53,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:53,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989399900] [2023-11-29 00:14:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:53,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:53,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989399900] [2023-11-29 00:14:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989399900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:14:53,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862138551] [2023-11-29 00:14:53,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:53,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:14:53,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:14:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:53,653 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-29 00:14:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:53,677 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2023-11-29 00:14:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:14:53,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2023-11-29 00:14:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:53,678 INFO L225 Difference]: With dead ends: 94 [2023-11-29 00:14:53,678 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 00:14:53,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:14:53,679 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:53,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 00:14:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-29 00:14:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.264367816091954) internal successors, (110), 90 states have internal predecessors, (110), 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) [2023-11-29 00:14:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2023-11-29 00:14:53,683 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 23 [2023-11-29 00:14:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:53,683 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2023-11-29 00:14:53,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-29 00:14:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2023-11-29 00:14:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:14:53,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:53,684 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 00:14:53,684 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:53,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1672577631, now seen corresponding path program 1 times [2023-11-29 00:14:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937610139] [2023-11-29 00:14:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:53,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937610139] [2023-11-29 00:14:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937610139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:14:53,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:14:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:14:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334694439] [2023-11-29 00:14:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:14:53,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:14:53,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:14:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:14:53,787 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-11-29 00:14:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:53,831 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2023-11-29 00:14:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:14:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2023-11-29 00:14:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:53,832 INFO L225 Difference]: With dead ends: 137 [2023-11-29 00:14:53,832 INFO L226 Difference]: Without dead ends: 108 [2023-11-29 00:14:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:14:53,833 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:53,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 94 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:14:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-29 00:14:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2023-11-29 00:14:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 104 states have internal predecessors, (123), 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) [2023-11-29 00:14:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2023-11-29 00:14:53,837 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 23 [2023-11-29 00:14:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:53,837 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2023-11-29 00:14:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2023-11-29 00:14:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2023-11-29 00:14:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:14:53,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:53,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:53,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 00:14:53,838 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1122187144, now seen corresponding path program 1 times [2023-11-29 00:14:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:53,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848154719] [2023-11-29 00:14:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:54,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848154719] [2023-11-29 00:14:54,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848154719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:54,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937172765] [2023-11-29 00:14:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:54,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:54,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:14:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:54,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:14:54,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:54,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:14:54,919 INFO L349 Elim1Store]: treesize reduction 14, result has 46.2 percent of original size [2023-11-29 00:14:54,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 22 [2023-11-29 00:14:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:54,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:55,145 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 35 treesize of output 31 [2023-11-29 00:14:55,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-11-29 00:14:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937172765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:55,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-11-29 00:14:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695415679] [2023-11-29 00:14:55,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:14:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:14:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:14:55,547 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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) [2023-11-29 00:14:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:56,333 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2023-11-29 00:14:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:14:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 23 [2023-11-29 00:14:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:56,334 INFO L225 Difference]: With dead ends: 154 [2023-11-29 00:14:56,334 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 00:14:56,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 00:14:56,336 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 276 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:56,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 294 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:14:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 00:14:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2023-11-29 00:14:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 119 states have internal predecessors, (142), 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) [2023-11-29 00:14:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2023-11-29 00:14:56,340 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 23 [2023-11-29 00:14:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:56,341 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2023-11-29 00:14:56,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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) [2023-11-29 00:14:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2023-11-29 00:14:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 00:14:56,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:56,342 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:56,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:14:56,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:14:56,542 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:56,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1804741215, now seen corresponding path program 1 times [2023-11-29 00:14:56,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:56,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232139927] [2023-11-29 00:14:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:56,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:56,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232139927] [2023-11-29 00:14:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232139927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880039891] [2023-11-29 00:14:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:56,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:56,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:14:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:56,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 00:14:56,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:56,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:14:56,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:14:56,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2023-11-29 00:14:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:57,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:57,385 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 13 treesize of output 11 [2023-11-29 00:14:57,390 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 15 treesize of output 11 [2023-11-29 00:14:57,396 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 22 treesize of output 20 [2023-11-29 00:14:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:14:57,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880039891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:57,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-29 00:14:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107130856] [2023-11-29 00:14:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:14:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:14:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:14:57,415 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2023-11-29 00:14:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:14:58,478 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2023-11-29 00:14:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:14:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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 23 [2023-11-29 00:14:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:14:58,479 INFO L225 Difference]: With dead ends: 146 [2023-11-29 00:14:58,479 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 00:14:58,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:14:58,480 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 184 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:14:58,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 181 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:14:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 00:14:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2023-11-29 00:14:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.2) internal successors, (144), 123 states have internal predecessors, (144), 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) [2023-11-29 00:14:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2023-11-29 00:14:58,484 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 23 [2023-11-29 00:14:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:14:58,484 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2023-11-29 00:14:58,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 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) [2023-11-29 00:14:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2023-11-29 00:14:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 00:14:58,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:14:58,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:14:58,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:14:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:58,693 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:14:58,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:14:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash 443776697, now seen corresponding path program 3 times [2023-11-29 00:14:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:14:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769529188] [2023-11-29 00:14:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:14:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:14:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:14:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:59,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:14:59,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769529188] [2023-11-29 00:14:59,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769529188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:14:59,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787678722] [2023-11-29 00:14:59,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:14:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:14:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:14:59,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:14:59,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:14:59,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:14:59,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:14:59,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 00:14:59,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:14:59,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:14:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:59,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:14:59,535 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 18 treesize of output 16 [2023-11-29 00:14:59,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:14:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:14:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787678722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:14:59,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:14:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 33 [2023-11-29 00:14:59,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115858346] [2023-11-29 00:14:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:14:59,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:14:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:14:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:14:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:14:59,692 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2023-11-29 00:15:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:01,628 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2023-11-29 00:15:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 00:15:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 25 [2023-11-29 00:15:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:01,630 INFO L225 Difference]: With dead ends: 221 [2023-11-29 00:15:01,630 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 00:15:01,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=550, Invalid=4280, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 00:15:01,632 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 243 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:01,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 897 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:15:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 00:15:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2023-11-29 00:15:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 143 states have internal predecessors, (166), 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) [2023-11-29 00:15:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2023-11-29 00:15:01,636 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 25 [2023-11-29 00:15:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2023-11-29 00:15:01,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2023-11-29 00:15:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2023-11-29 00:15:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:15:01,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:01,637 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:01,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:15:01,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:01,838 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:01,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1133630736, now seen corresponding path program 2 times [2023-11-29 00:15:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249010156] [2023-11-29 00:15:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249010156] [2023-11-29 00:15:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249010156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943271293] [2023-11-29 00:15:02,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:15:02,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:02,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:02,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:02,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:15:02,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:15:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:02,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:15:02,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:02,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:15:04,131 INFO L349 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2023-11-29 00:15:04,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 35 [2023-11-29 00:15:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:04,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:04,485 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 53 treesize of output 47 [2023-11-29 00:15:04,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2023-11-29 00:15:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943271293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:04,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:04,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2023-11-29 00:15:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720452943] [2023-11-29 00:15:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:15:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:15:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1560, Unknown=1, NotChecked=0, Total=1722 [2023-11-29 00:15:04,960 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 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) [2023-11-29 00:15:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:06,616 INFO L93 Difference]: Finished difference Result 214 states and 243 transitions. [2023-11-29 00:15:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:15:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 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 27 [2023-11-29 00:15:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:06,618 INFO L225 Difference]: With dead ends: 214 [2023-11-29 00:15:06,618 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 00:15:06,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=562, Invalid=2977, Unknown=1, NotChecked=0, Total=3540 [2023-11-29 00:15:06,620 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 374 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:06,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 402 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:15:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 00:15:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 159. [2023-11-29 00:15:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 158 states have internal predecessors, (185), 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) [2023-11-29 00:15:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2023-11-29 00:15:06,623 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 27 [2023-11-29 00:15:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:06,624 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2023-11-29 00:15:06,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 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) [2023-11-29 00:15:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2023-11-29 00:15:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 00:15:06,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:06,625 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:06,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:15:06,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:06,830 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:06,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash 238125777, now seen corresponding path program 4 times [2023-11-29 00:15:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:06,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701526572] [2023-11-29 00:15:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:06,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:07,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701526572] [2023-11-29 00:15:07,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701526572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:07,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948786623] [2023-11-29 00:15:07,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:15:07,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:07,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:07,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:07,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:15:07,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:15:07,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:07,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:15:07,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:07,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:15:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:07,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:07,898 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 18 treesize of output 16 [2023-11-29 00:15:07,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:15:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948786623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:08,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:08,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2023-11-29 00:15:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888727323] [2023-11-29 00:15:08,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:15:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:15:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:15:08,114 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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) [2023-11-29 00:15:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:10,459 INFO L93 Difference]: Finished difference Result 271 states and 301 transitions. [2023-11-29 00:15:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 00:15:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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 29 [2023-11-29 00:15:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:10,461 INFO L225 Difference]: With dead ends: 271 [2023-11-29 00:15:10,461 INFO L226 Difference]: Without dead ends: 241 [2023-11-29 00:15:10,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 00:15:10,464 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 412 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:10,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 958 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:15:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-29 00:15:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 179. [2023-11-29 00:15:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.1828571428571428) internal successors, (207), 178 states have internal predecessors, (207), 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) [2023-11-29 00:15:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2023-11-29 00:15:10,468 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 29 [2023-11-29 00:15:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:10,469 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2023-11-29 00:15:10,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 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) [2023-11-29 00:15:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2023-11-29 00:15:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:15:10,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:10,469 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:10,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:15:10,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:15:10,670 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:10,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1262486537, now seen corresponding path program 2 times [2023-11-29 00:15:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:10,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216555937] [2023-11-29 00:15:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:15:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216555937] [2023-11-29 00:15:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216555937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837680945] [2023-11-29 00:15:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:15:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:11,069 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:15:11,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:15:11,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:11,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:15:11,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:11,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:15:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:15:11,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:15:11,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837680945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:11,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:15:11,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-29 00:15:11,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783932463] [2023-11-29 00:15:11,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:11,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:15:11,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:15:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:15:11,346 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2023-11-29 00:15:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:11,471 INFO L93 Difference]: Finished difference Result 248 states and 279 transitions. [2023-11-29 00:15:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:15:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 30 [2023-11-29 00:15:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:11,472 INFO L225 Difference]: With dead ends: 248 [2023-11-29 00:15:11,473 INFO L226 Difference]: Without dead ends: 206 [2023-11-29 00:15:11,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:15:11,474 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:11,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 144 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:15:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-29 00:15:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 179. [2023-11-29 00:15:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.1714285714285715) internal successors, (205), 178 states have internal predecessors, (205), 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) [2023-11-29 00:15:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2023-11-29 00:15:11,480 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 30 [2023-11-29 00:15:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:11,480 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2023-11-29 00:15:11,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2023-11-29 00:15:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2023-11-29 00:15:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:15:11,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:11,481 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:11,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:15:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:15:11,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:11,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash 753013447, now seen corresponding path program 1 times [2023-11-29 00:15:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:11,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912535538] [2023-11-29 00:15:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:11,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:11,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912535538] [2023-11-29 00:15:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912535538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756707952] [2023-11-29 00:15:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:11,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:11,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:11,961 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:11,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:15:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:12,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:15:12,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:12,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:15:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:15:12,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:15:12,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2023-11-29 00:15:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:15:12,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:15:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756707952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:12,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:15:12,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 19 [2023-11-29 00:15:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583398789] [2023-11-29 00:15:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:15:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:15:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:15:12,305 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-11-29 00:15:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:12,514 INFO L93 Difference]: Finished difference Result 256 states and 289 transitions. [2023-11-29 00:15:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:15:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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 30 [2023-11-29 00:15:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:12,515 INFO L225 Difference]: With dead ends: 256 [2023-11-29 00:15:12,515 INFO L226 Difference]: Without dead ends: 218 [2023-11-29 00:15:12,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:15:12,516 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:12,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 131 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:15:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-29 00:15:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2023-11-29 00:15:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 182 states have internal predecessors, (211), 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) [2023-11-29 00:15:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 211 transitions. [2023-11-29 00:15:12,522 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 211 transitions. Word has length 30 [2023-11-29 00:15:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:12,523 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 211 transitions. [2023-11-29 00:15:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 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) [2023-11-29 00:15:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 211 transitions. [2023-11-29 00:15:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 00:15:12,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:12,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:12,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:15:12,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:12,727 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 696132648, now seen corresponding path program 3 times [2023-11-29 00:15:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597930597] [2023-11-29 00:15:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:12,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:13,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597930597] [2023-11-29 00:15:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597930597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:13,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847376999] [2023-11-29 00:15:13,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:15:13,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:13,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:13,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:15:13,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:15:13,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:13,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 00:15:13,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:14,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:15:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:14,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:14,754 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 71 treesize of output 63 [2023-11-29 00:15:14,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:15:14,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 61 [2023-11-29 00:15:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847376999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:15,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:15,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 44 [2023-11-29 00:15:15,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100797107] [2023-11-29 00:15:15,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:15,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 00:15:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:15,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 00:15:15,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:15:15,189 INFO L87 Difference]: Start difference. First operand 183 states and 211 transitions. Second operand has 44 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 44 states have internal predecessors, (72), 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) [2023-11-29 00:15:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:17,151 INFO L93 Difference]: Finished difference Result 299 states and 337 transitions. [2023-11-29 00:15:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:15:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 44 states have internal predecessors, (72), 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 31 [2023-11-29 00:15:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:17,153 INFO L225 Difference]: With dead ends: 299 [2023-11-29 00:15:17,153 INFO L226 Difference]: Without dead ends: 285 [2023-11-29 00:15:17,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=714, Invalid=3708, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:15:17,155 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 336 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:17,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 298 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:15:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-29 00:15:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 194. [2023-11-29 00:15:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.1842105263157894) internal successors, (225), 193 states have internal predecessors, (225), 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) [2023-11-29 00:15:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 225 transitions. [2023-11-29 00:15:17,160 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 225 transitions. Word has length 31 [2023-11-29 00:15:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:17,160 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 225 transitions. [2023-11-29 00:15:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 44 states have internal predecessors, (72), 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) [2023-11-29 00:15:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 225 transitions. [2023-11-29 00:15:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:15:17,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:17,160 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:17,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:15:17,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:17,361 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:17,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1464104213, now seen corresponding path program 1 times [2023-11-29 00:15:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:17,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228974880] [2023-11-29 00:15:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:15:17,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228974880] [2023-11-29 00:15:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228974880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530378521] [2023-11-29 00:15:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:17,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:17,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:15:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:17,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:15:17,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:17,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:15:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:15:18,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:15:18,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-11-29 00:15:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:18,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:18,264 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 15 treesize of output 13 [2023-11-29 00:15:18,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:15:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:18,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530378521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:18,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:18,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2023-11-29 00:15:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761524722] [2023-11-29 00:15:18,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:15:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:15:18,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:15:18,536 INFO L87 Difference]: Start difference. First operand 194 states and 225 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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) [2023-11-29 00:15:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:19,473 INFO L93 Difference]: Finished difference Result 242 states and 271 transitions. [2023-11-29 00:15:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 00:15:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 32 [2023-11-29 00:15:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:19,475 INFO L225 Difference]: With dead ends: 242 [2023-11-29 00:15:19,475 INFO L226 Difference]: Without dead ends: 220 [2023-11-29 00:15:19,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 00:15:19,476 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:19,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 386 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:15:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-29 00:15:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 186. [2023-11-29 00:15:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.1813186813186813) internal successors, (215), 185 states have internal predecessors, (215), 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) [2023-11-29 00:15:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 215 transitions. [2023-11-29 00:15:19,481 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 215 transitions. Word has length 32 [2023-11-29 00:15:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:19,481 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 215 transitions. [2023-11-29 00:15:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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) [2023-11-29 00:15:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 215 transitions. [2023-11-29 00:15:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:15:19,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:19,481 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:19,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:15:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:15:19,682 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:19,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 488573289, now seen corresponding path program 5 times [2023-11-29 00:15:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765453215] [2023-11-29 00:15:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:20,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765453215] [2023-11-29 00:15:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765453215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858394610] [2023-11-29 00:15:20,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:15:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:20,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:20,292 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:20,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:15:20,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 00:15:20,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:20,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 00:15:20,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:20,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:15:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:20,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:20,828 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 18 treesize of output 16 [2023-11-29 00:15:20,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:15:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:21,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858394610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:21,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:21,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 43 [2023-11-29 00:15:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111848044] [2023-11-29 00:15:21,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:15:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:15:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:15:21,088 INFO L87 Difference]: Start difference. First operand 186 states and 215 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 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) [2023-11-29 00:15:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:24,243 INFO L93 Difference]: Finished difference Result 363 states and 398 transitions. [2023-11-29 00:15:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 00:15:24,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 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 33 [2023-11-29 00:15:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:24,245 INFO L225 Difference]: With dead ends: 363 [2023-11-29 00:15:24,245 INFO L226 Difference]: Without dead ends: 316 [2023-11-29 00:15:24,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=757, Invalid=7615, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 00:15:24,248 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 559 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:24,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1052 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:15:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-29 00:15:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 209. [2023-11-29 00:15:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.170731707317073) internal successors, (240), 208 states have internal predecessors, (240), 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) [2023-11-29 00:15:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 240 transitions. [2023-11-29 00:15:24,253 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 240 transitions. Word has length 33 [2023-11-29 00:15:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:24,253 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 240 transitions. [2023-11-29 00:15:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 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) [2023-11-29 00:15:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 240 transitions. [2023-11-29 00:15:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:15:24,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:24,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:24,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:15:24,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:24,455 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:24,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:24,455 INFO L85 PathProgramCache]: Analyzing trace with hash 278458614, now seen corresponding path program 2 times [2023-11-29 00:15:24,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:24,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640005609] [2023-11-29 00:15:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:24,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640005609] [2023-11-29 00:15:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640005609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826419821] [2023-11-29 00:15:24,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:15:24,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:24,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:24,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:15:24,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:15:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:24,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:15:24,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:24,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:15:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:15:25,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:25,050 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 15 treesize of output 13 [2023-11-29 00:15:25,051 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 16 treesize of output 12 [2023-11-29 00:15:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 00:15:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826419821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:25,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 26 [2023-11-29 00:15:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737802956] [2023-11-29 00:15:25,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:15:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:25,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:15:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:15:25,097 INFO L87 Difference]: Start difference. First operand 209 states and 240 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 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) [2023-11-29 00:15:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:26,053 INFO L93 Difference]: Finished difference Result 441 states and 477 transitions. [2023-11-29 00:15:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:15:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 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 34 [2023-11-29 00:15:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:26,055 INFO L225 Difference]: With dead ends: 441 [2023-11-29 00:15:26,055 INFO L226 Difference]: Without dead ends: 327 [2023-11-29 00:15:26,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=562, Invalid=3728, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 00:15:26,057 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:26,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 417 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:15:26,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-29 00:15:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 251. [2023-11-29 00:15:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.1578947368421053) internal successors, (286), 250 states have internal predecessors, (286), 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) [2023-11-29 00:15:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 286 transitions. [2023-11-29 00:15:26,062 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 286 transitions. Word has length 34 [2023-11-29 00:15:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:26,062 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 286 transitions. [2023-11-29 00:15:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 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) [2023-11-29 00:15:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 286 transitions. [2023-11-29 00:15:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 00:15:26,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:26,063 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:26,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:15:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:26,264 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:26,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1642255808, now seen corresponding path program 4 times [2023-11-29 00:15:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:26,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719829029] [2023-11-29 00:15:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:27,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:27,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719829029] [2023-11-29 00:15:27,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719829029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700674191] [2023-11-29 00:15:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:15:27,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:27,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:27,452 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:27,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:15:27,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:15:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:27,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 00:15:27,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:27,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:15:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:28,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:28,640 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 89 treesize of output 79 [2023-11-29 00:15:28,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2023-11-29 00:15:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:29,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700674191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:29,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:29,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2023-11-29 00:15:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550501579] [2023-11-29 00:15:29,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:29,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:15:29,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:15:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:15:29,194 INFO L87 Difference]: Start difference. First operand 251 states and 286 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 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) [2023-11-29 00:15:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:30,501 INFO L93 Difference]: Finished difference Result 399 states and 445 transitions. [2023-11-29 00:15:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:15:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 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 35 [2023-11-29 00:15:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:30,503 INFO L225 Difference]: With dead ends: 399 [2023-11-29 00:15:30,503 INFO L226 Difference]: Without dead ends: 369 [2023-11-29 00:15:30,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=633, Invalid=4479, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 00:15:30,504 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 327 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:30,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 338 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:15:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-29 00:15:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2023-11-29 00:15:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1615384615384616) internal successors, (302), 263 states have internal predecessors, (302), 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) [2023-11-29 00:15:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 302 transitions. [2023-11-29 00:15:30,508 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 302 transitions. Word has length 35 [2023-11-29 00:15:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:30,508 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 302 transitions. [2023-11-29 00:15:30,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 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) [2023-11-29 00:15:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 302 transitions. [2023-11-29 00:15:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 00:15:30,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:30,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:30,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:15:30,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 00:15:30,710 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:30,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 605893249, now seen corresponding path program 6 times [2023-11-29 00:15:30,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:30,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127556937] [2023-11-29 00:15:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127556937] [2023-11-29 00:15:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127556937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269421033] [2023-11-29 00:15:31,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:15:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:31,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:31,284 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:31,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:15:31,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 00:15:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:31,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:15:31,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:31,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:15:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:31,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:31,923 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 18 treesize of output 16 [2023-11-29 00:15:31,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:15:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:32,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269421033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:32,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 48 [2023-11-29 00:15:32,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237568533] [2023-11-29 00:15:32,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:32,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 00:15:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 00:15:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 00:15:32,220 INFO L87 Difference]: Start difference. First operand 264 states and 302 transitions. Second operand has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 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) [2023-11-29 00:15:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:35,646 INFO L93 Difference]: Finished difference Result 482 states and 528 transitions. [2023-11-29 00:15:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:15:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 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 37 [2023-11-29 00:15:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:35,649 INFO L225 Difference]: With dead ends: 482 [2023-11-29 00:15:35,649 INFO L226 Difference]: Without dead ends: 423 [2023-11-29 00:15:35,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=871, Invalid=9635, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 00:15:35,650 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 701 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:35,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1312 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:15:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-29 00:15:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 289. [2023-11-29 00:15:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 285 states have (on average 1.1543859649122807) internal successors, (329), 288 states have internal predecessors, (329), 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) [2023-11-29 00:15:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2023-11-29 00:15:35,658 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 37 [2023-11-29 00:15:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:35,658 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2023-11-29 00:15:35,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 48 states have internal predecessors, (89), 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) [2023-11-29 00:15:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2023-11-29 00:15:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 00:15:35,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:35,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:35,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:15:35,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 00:15:35,859 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:35,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash -373414171, now seen corresponding path program 3 times [2023-11-29 00:15:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814287180] [2023-11-29 00:15:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:15:36,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:36,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814287180] [2023-11-29 00:15:36,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814287180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:36,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642438536] [2023-11-29 00:15:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:15:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:36,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:36,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:15:36,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:15:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:36,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 00:15:36,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:15:36,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:15:36,559 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 5 treesize of output 3 [2023-11-29 00:15:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:15:36,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642438536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:15:36,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:15:36,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-11-29 00:15:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000869358] [2023-11-29 00:15:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:15:36,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:15:36,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:15:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:15:36,594 INFO L87 Difference]: Start difference. First operand 289 states and 329 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 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) [2023-11-29 00:15:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:15:37,033 INFO L93 Difference]: Finished difference Result 365 states and 403 transitions. [2023-11-29 00:15:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:15:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 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 38 [2023-11-29 00:15:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:15:37,036 INFO L225 Difference]: With dead ends: 365 [2023-11-29 00:15:37,036 INFO L226 Difference]: Without dead ends: 365 [2023-11-29 00:15:37,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:15:37,036 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 121 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:15:37,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 226 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:15:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-29 00:15:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 315. [2023-11-29 00:15:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.144694533762058) internal successors, (356), 314 states have internal predecessors, (356), 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) [2023-11-29 00:15:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 356 transitions. [2023-11-29 00:15:37,041 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 356 transitions. Word has length 38 [2023-11-29 00:15:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:15:37,041 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 356 transitions. [2023-11-29 00:15:37,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 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) [2023-11-29 00:15:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 356 transitions. [2023-11-29 00:15:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:15:37,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:15:37,042 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:15:37,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:15:37,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 00:15:37,243 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:15:37,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:37,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2048461272, now seen corresponding path program 5 times [2023-11-29 00:15:37,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:37,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576616276] [2023-11-29 00:15:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:15:38,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:38,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576616276] [2023-11-29 00:15:38,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576616276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:15:38,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139625388] [2023-11-29 00:15:38,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:15:38,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:15:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:38,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:15:38,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:15:38,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 00:15:38,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:15:38,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 00:15:38,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:15:39,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:16:02,578 INFO L349 Elim1Store]: treesize reduction 27, result has 55.7 percent of original size [2023-11-29 00:16:02,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2023-11-29 00:16:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 41 refuted. 16 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:02,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:04,833 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 107 treesize of output 95 [2023-11-29 00:16:04,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:16:04,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 113 treesize of output 91 [2023-11-29 00:16:05,675 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 00:16:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139625388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:05,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:05,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2023-11-29 00:16:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661248888] [2023-11-29 00:16:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 00:16:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 00:16:05,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3150, Unknown=26, NotChecked=0, Total=3540 [2023-11-29 00:16:05,750 INFO L87 Difference]: Start difference. First operand 315 states and 356 transitions. Second operand has 60 states, 60 states have (on average 1.55) internal successors, (93), 60 states have internal predecessors, (93), 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) [2023-11-29 00:16:11,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:11,803 INFO L93 Difference]: Finished difference Result 531 states and 588 transitions. [2023-11-29 00:16:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:16:11,805 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.55) internal successors, (93), 60 states have internal predecessors, (93), 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 39 [2023-11-29 00:16:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:11,807 INFO L225 Difference]: With dead ends: 531 [2023-11-29 00:16:11,807 INFO L226 Difference]: Without dead ends: 497 [2023-11-29 00:16:11,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1338, Invalid=7008, Unknown=26, NotChecked=0, Total=8372 [2023-11-29 00:16:11,808 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 319 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:11,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 306 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:16:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-11-29 00:16:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 328. [2023-11-29 00:16:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 324 states have (on average 1.1481481481481481) internal successors, (372), 327 states have internal predecessors, (372), 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) [2023-11-29 00:16:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 372 transitions. [2023-11-29 00:16:11,816 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 372 transitions. Word has length 39 [2023-11-29 00:16:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:11,816 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 372 transitions. [2023-11-29 00:16:11,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.55) internal successors, (93), 60 states have internal predecessors, (93), 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) [2023-11-29 00:16:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 372 transitions. [2023-11-29 00:16:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:16:11,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:11,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:11,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:16:12,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:16:12,018 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:12,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1243887396, now seen corresponding path program 1 times [2023-11-29 00:16:12,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:12,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160916304] [2023-11-29 00:16:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:12,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:16:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160916304] [2023-11-29 00:16:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160916304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344948161] [2023-11-29 00:16:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:12,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:12,243 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:12,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:16:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:12,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:16:12,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:16:12,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:16:12,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344948161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:12,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:12,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-11-29 00:16:12,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932382067] [2023-11-29 00:16:12,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:12,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:16:12,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:16:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:16:12,786 INFO L87 Difference]: Start difference. First operand 328 states and 372 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 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) [2023-11-29 00:16:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:13,350 INFO L93 Difference]: Finished difference Result 393 states and 436 transitions. [2023-11-29 00:16:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:16:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 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 39 [2023-11-29 00:16:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:13,352 INFO L225 Difference]: With dead ends: 393 [2023-11-29 00:16:13,352 INFO L226 Difference]: Without dead ends: 367 [2023-11-29 00:16:13,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 00:16:13,352 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 261 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:13,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 334 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:16:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-29 00:16:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 307. [2023-11-29 00:16:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 303 states have (on average 1.1518151815181519) internal successors, (349), 306 states have internal predecessors, (349), 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) [2023-11-29 00:16:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 349 transitions. [2023-11-29 00:16:13,359 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 349 transitions. Word has length 39 [2023-11-29 00:16:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:13,359 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 349 transitions. [2023-11-29 00:16:13,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 32 states have internal predecessors, (80), 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) [2023-11-29 00:16:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 349 transitions. [2023-11-29 00:16:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 00:16:13,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:13,360 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:13,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:16:13,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:16:13,561 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:13,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1436213735, now seen corresponding path program 7 times [2023-11-29 00:16:13,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:13,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040364890] [2023-11-29 00:16:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040364890] [2023-11-29 00:16:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040364890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587821300] [2023-11-29 00:16:14,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:16:14,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:14,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:14,269 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:14,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:16:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:14,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 00:16:14,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:14,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:16:15,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:16:15,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:16:15,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-11-29 00:16:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:15,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:15,840 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 18 treesize of output 16 [2023-11-29 00:16:15,844 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 26 treesize of output 22 [2023-11-29 00:16:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:16,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587821300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:16,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 64 [2023-11-29 00:16:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64844050] [2023-11-29 00:16:16,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 00:16:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 00:16:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 00:16:16,623 INFO L87 Difference]: Start difference. First operand 307 states and 349 transitions. Second operand has 64 states, 64 states have (on average 1.78125) internal successors, (114), 64 states have internal predecessors, (114), 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) [2023-11-29 00:16:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:22,233 INFO L93 Difference]: Finished difference Result 571 states and 623 transitions. [2023-11-29 00:16:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 00:16:22,234 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.78125) internal successors, (114), 64 states have internal predecessors, (114), 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 41 [2023-11-29 00:16:22,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:22,236 INFO L225 Difference]: With dead ends: 571 [2023-11-29 00:16:22,236 INFO L226 Difference]: Without dead ends: 508 [2023-11-29 00:16:22,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1054, Invalid=14446, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 00:16:22,237 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 652 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 4134 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 4150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:22,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 2016 Invalid, 4150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4134 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:16:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-29 00:16:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 337. [2023-11-29 00:16:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 333 states have (on average 1.1441441441441442) internal successors, (381), 336 states have internal predecessors, (381), 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) [2023-11-29 00:16:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 381 transitions. [2023-11-29 00:16:22,242 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 381 transitions. Word has length 41 [2023-11-29 00:16:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:22,242 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 381 transitions. [2023-11-29 00:16:22,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.78125) internal successors, (114), 64 states have internal predecessors, (114), 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) [2023-11-29 00:16:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 381 transitions. [2023-11-29 00:16:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:16:22,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:22,243 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:22,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 00:16:22,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 00:16:22,444 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:22,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1406263408, now seen corresponding path program 6 times [2023-11-29 00:16:22,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:22,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218647378] [2023-11-29 00:16:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 41 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218647378] [2023-11-29 00:16:24,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218647378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461689996] [2023-11-29 00:16:24,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:16:24,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:24,277 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:16:24,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 00:16:24,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:24,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 00:16:24,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:24,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:16:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:25,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:26,376 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 125 treesize of output 111 [2023-11-29 00:16:26,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:16:26,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 106 [2023-11-29 00:16:27,457 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:16:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461689996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:27,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:27,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 67 [2023-11-29 00:16:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393152208] [2023-11-29 00:16:27,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:27,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 00:16:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 00:16:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=4021, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:16:27,543 INFO L87 Difference]: Start difference. First operand 337 states and 381 transitions. Second operand has 67 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 67 states have internal predecessors, (105), 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) [2023-11-29 00:16:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:32,327 INFO L93 Difference]: Finished difference Result 657 states and 726 transitions. [2023-11-29 00:16:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:16:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 67 states have internal predecessors, (105), 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 43 [2023-11-29 00:16:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:32,330 INFO L225 Difference]: With dead ends: 657 [2023-11-29 00:16:32,330 INFO L226 Difference]: Without dead ends: 619 [2023-11-29 00:16:32,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3813 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1961, Invalid=11845, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 00:16:32,332 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 950 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:32,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 656 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:16:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-11-29 00:16:32,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 350. [2023-11-29 00:16:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 346 states have (on average 1.1473988439306357) internal successors, (397), 349 states have internal predecessors, (397), 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) [2023-11-29 00:16:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 397 transitions. [2023-11-29 00:16:32,341 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 397 transitions. Word has length 43 [2023-11-29 00:16:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:32,342 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 397 transitions. [2023-11-29 00:16:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 67 states have internal predecessors, (105), 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) [2023-11-29 00:16:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 397 transitions. [2023-11-29 00:16:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:16:32,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:32,343 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:32,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:16:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 00:16:32,543 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash -572342430, now seen corresponding path program 4 times [2023-11-29 00:16:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119322159] [2023-11-29 00:16:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:16:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:32,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119322159] [2023-11-29 00:16:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119322159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:32,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321544384] [2023-11-29 00:16:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:16:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:32,841 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:32,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:16:33,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:16:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:33,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:16:33,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:33,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:16:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:16:33,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:33,226 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 15 treesize of output 13 [2023-11-29 00:16:33,228 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 16 treesize of output 12 [2023-11-29 00:16:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:16:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321544384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:33,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:33,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 29 [2023-11-29 00:16:33,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855010184] [2023-11-29 00:16:33,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 00:16:33,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 00:16:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:16:33,275 INFO L87 Difference]: Start difference. First operand 350 states and 397 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 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) [2023-11-29 00:16:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:34,497 INFO L93 Difference]: Finished difference Result 733 states and 794 transitions. [2023-11-29 00:16:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 00:16:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 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 43 [2023-11-29 00:16:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:34,500 INFO L225 Difference]: With dead ends: 733 [2023-11-29 00:16:34,500 INFO L226 Difference]: Without dead ends: 589 [2023-11-29 00:16:34,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=692, Invalid=5950, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 00:16:34,501 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 313 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:34,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 415 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:16:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-29 00:16:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 431. [2023-11-29 00:16:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 427 states have (on average 1.1405152224824355) internal successors, (487), 430 states have internal predecessors, (487), 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) [2023-11-29 00:16:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 487 transitions. [2023-11-29 00:16:34,507 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 487 transitions. Word has length 43 [2023-11-29 00:16:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:34,507 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 487 transitions. [2023-11-29 00:16:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 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) [2023-11-29 00:16:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 487 transitions. [2023-11-29 00:16:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:16:34,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:34,508 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:34,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 00:16:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:34,708 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:34,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2021344068, now seen corresponding path program 2 times [2023-11-29 00:16:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008845991] [2023-11-29 00:16:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:35,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:35,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008845991] [2023-11-29 00:16:35,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008845991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:35,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473652599] [2023-11-29 00:16:35,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:16:35,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:35,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:35,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:16:35,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:16:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:35,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 00:16:35,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:35,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:16:36,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:16:36,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2023-11-29 00:16:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:36,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:36,506 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 18 treesize of output 16 [2023-11-29 00:16:36,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:16:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473652599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:37,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2023-11-29 00:16:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183859345] [2023-11-29 00:16:37,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 00:16:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 00:16:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:16:37,102 INFO L87 Difference]: Start difference. First operand 431 states and 487 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 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) [2023-11-29 00:16:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:40,084 INFO L93 Difference]: Finished difference Result 497 states and 552 transitions. [2023-11-29 00:16:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:16:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 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 43 [2023-11-29 00:16:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:40,087 INFO L225 Difference]: With dead ends: 497 [2023-11-29 00:16:40,087 INFO L226 Difference]: Without dead ends: 474 [2023-11-29 00:16:40,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1440, Invalid=8262, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 00:16:40,088 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 368 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:40,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 480 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:16:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-29 00:16:40,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 408. [2023-11-29 00:16:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 404 states have (on average 1.1435643564356435) internal successors, (462), 407 states have internal predecessors, (462), 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) [2023-11-29 00:16:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 462 transitions. [2023-11-29 00:16:40,093 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 462 transitions. Word has length 43 [2023-11-29 00:16:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:40,094 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 462 transitions. [2023-11-29 00:16:40,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 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) [2023-11-29 00:16:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 462 transitions. [2023-11-29 00:16:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 00:16:40,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:40,095 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:40,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:16:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:40,295 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:40,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1685590991, now seen corresponding path program 8 times [2023-11-29 00:16:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:40,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460408780] [2023-11-29 00:16:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460408780] [2023-11-29 00:16:41,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460408780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966042651] [2023-11-29 00:16:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:16:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:41,095 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:41,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:16:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:16:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:16:41,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 00:16:41,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:41,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:16:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:16:42,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:16:42,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-11-29 00:16:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:42,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:16:42,897 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 18 treesize of output 16 [2023-11-29 00:16:42,899 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 26 treesize of output 22 [2023-11-29 00:16:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966042651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:16:43,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:16:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 70 [2023-11-29 00:16:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403221696] [2023-11-29 00:16:43,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:16:43,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 00:16:43,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 00:16:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4624, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 00:16:43,747 INFO L87 Difference]: Start difference. First operand 408 states and 462 transitions. Second operand has 70 states, 70 states have (on average 1.8) internal successors, (126), 70 states have internal predecessors, (126), 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) [2023-11-29 00:16:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:16:50,434 INFO L93 Difference]: Finished difference Result 726 states and 794 transitions. [2023-11-29 00:16:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:16:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.8) internal successors, (126), 70 states have internal predecessors, (126), 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 45 [2023-11-29 00:16:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:16:50,436 INFO L225 Difference]: With dead ends: 726 [2023-11-29 00:16:50,436 INFO L226 Difference]: Without dead ends: 654 [2023-11-29 00:16:50,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1184, Invalid=17448, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 00:16:50,437 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 915 mSDsluCounter, 1889 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1945 SdHoareTripleChecker+Invalid, 4317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:16:50,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1945 Invalid, 4317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:16:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2023-11-29 00:16:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 440. [2023-11-29 00:16:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 436 states have (on average 1.1376146788990826) internal successors, (496), 439 states have internal predecessors, (496), 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) [2023-11-29 00:16:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 496 transitions. [2023-11-29 00:16:50,443 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 496 transitions. Word has length 45 [2023-11-29 00:16:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:16:50,443 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 496 transitions. [2023-11-29 00:16:50,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.8) internal successors, (126), 70 states have internal predecessors, (126), 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) [2023-11-29 00:16:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 496 transitions. [2023-11-29 00:16:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:16:50,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:16:50,444 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:50,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:16:50,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 00:16:50,645 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:16:50,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1595308424, now seen corresponding path program 7 times [2023-11-29 00:16:50,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:50,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126107797] [2023-11-29 00:16:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:50,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:52,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126107797] [2023-11-29 00:16:52,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126107797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:16:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605731923] [2023-11-29 00:16:52,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:16:52,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:16:52,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:16:52,772 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:16:52,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:16:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:52,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 00:16:52,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:16:53,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:17:44,413 INFO L349 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2023-11-29 00:17:44,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2023-11-29 00:17:44,417 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-11-29 00:17:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 31 proven. 71 refuted. 42 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:17:44,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:17:48,401 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 143 treesize of output 127 [2023-11-29 00:17:48,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:17:48,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 121 [2023-11-29 00:17:50,120 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-11-29 00:17:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 80 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:17:50,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605731923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:17:50,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:17:50,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2023-11-29 00:17:50,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677007502] [2023-11-29 00:17:50,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:17:50,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 00:17:50,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 00:17:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=5061, Unknown=70, NotChecked=0, Total=5700 [2023-11-29 00:17:50,252 INFO L87 Difference]: Start difference. First operand 440 states and 496 transitions. Second operand has 76 states, 76 states have (on average 1.513157894736842) internal successors, (115), 76 states have internal predecessors, (115), 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) [2023-11-29 00:18:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:18:21,508 INFO L93 Difference]: Finished difference Result 888 states and 977 transitions. [2023-11-29 00:18:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 00:18:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.513157894736842) internal successors, (115), 76 states have internal predecessors, (115), 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 47 [2023-11-29 00:18:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:18:21,512 INFO L225 Difference]: With dead ends: 888 [2023-11-29 00:18:21,512 INFO L226 Difference]: Without dead ends: 846 [2023-11-29 00:18:21,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=2759, Invalid=14993, Unknown=70, NotChecked=0, Total=17822 [2023-11-29 00:18:21,513 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 859 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:18:21,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 520 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 00:18:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-11-29 00:18:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 461. [2023-11-29 00:18:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 457 states have (on average 1.140043763676149) internal successors, (521), 460 states have internal predecessors, (521), 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) [2023-11-29 00:18:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 521 transitions. [2023-11-29 00:18:21,523 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 521 transitions. Word has length 47 [2023-11-29 00:18:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:18:21,523 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 521 transitions. [2023-11-29 00:18:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.513157894736842) internal successors, (115), 76 states have internal predecessors, (115), 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) [2023-11-29 00:18:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 521 transitions. [2023-11-29 00:18:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:18:21,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:18:21,524 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:21,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 00:18:21,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:21,725 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-29 00:18:21,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:21,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1899920172, now seen corresponding path program 3 times [2023-11-29 00:18:21,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:21,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757267396] [2023-11-29 00:18:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:21,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:18:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757267396] [2023-11-29 00:18:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757267396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:18:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599046006] [2023-11-29 00:18:24,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:18:24,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:18:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:18:24,381 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:18:24,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39f27868-9204-42ac-ae9b-c02de96e31d3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:18:24,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 00:18:24,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:18:24,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 00:18:24,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:18:24,787 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 [2023-11-29 00:18:24,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 00:18:24,813 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 10 treesize of output 8 [2023-11-29 00:18:25,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:18:25,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:18:33,671 INFO L349 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2023-11-29 00:18:33,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 47 [2023-11-29 00:18:35,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:18:35,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-11-29 00:18:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:18:36,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:18:38,014 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 15 treesize of output 13 [2023-11-29 00:18:38,016 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 16 treesize of output 12 [2023-11-29 00:18:38,170 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 33 treesize of output 29 [2023-11-29 00:18:38,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:18:38,182 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 47 treesize of output 51 [2023-11-29 00:18:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:18:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:18:40,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599046006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:18:40,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:18:40,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 71 [2023-11-29 00:18:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248738395] [2023-11-29 00:18:40,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:18:40,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 00:18:40,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 00:18:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=4645, Unknown=1, NotChecked=0, Total=4970 [2023-11-29 00:18:40,129 INFO L87 Difference]: Start difference. First operand 461 states and 521 transitions. Second operand has 71 states, 71 states have (on average 1.7887323943661972) internal successors, (127), 71 states have internal predecessors, (127), 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) [2023-11-29 00:19:30,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:10,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:18,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:21:35,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:22:35,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:23:57,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]