./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:58:46,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:58:46,641 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:58:46,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:58:46,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:58:46,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:58:46,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:58:46,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:58:46,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:58:46,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:58:46,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:58:46,706 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:58:46,706 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:58:46,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:58:46,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:58:46,709 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:58:46,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:58:46,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:58:46,711 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:58:46,711 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:58:46,712 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:58:46,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:58:46,713 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:58:46,714 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:58:46,715 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:58:46,716 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:58:46,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:58:46,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:58:46,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:58:46,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:46,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:58:46,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:58:46,720 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:58:46,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:58:46,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:58:46,721 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:58:46,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:58:46,722 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:58:46,722 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_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2023-11-06 21:58:47,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:58:47,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:58:47,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:58:47,068 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:58:47,069 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:58:47,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-11-06 21:58:50,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:58:50,474 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:58:50,474 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2023-11-06 21:58:50,492 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/data/dfd9162b5/f40df47c09cd49f3889eaf9b6d19c1b8/FLAGe44464fcf [2023-11-06 21:58:50,514 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/data/dfd9162b5/f40df47c09cd49f3889eaf9b6d19c1b8 [2023-11-06 21:58:50,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:58:50,519 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:58:50,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:50,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:58:50,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:58:50,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:50" (1/1) ... [2023-11-06 21:58:50,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798a7506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:50, skipping insertion in model container [2023-11-06 21:58:50,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:50" (1/1) ... [2023-11-06 21:58:50,573 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:58:50,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:50,918 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:58:50,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:50,999 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:58:51,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51 WrapperNode [2023-11-06 21:58:51,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:51,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:51,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:58:51,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:58:51,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,054 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 192 [2023-11-06 21:58:51,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:51,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:58:51,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:58:51,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:58:51,065 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:58:51,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:58:51,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:58:51,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:58:51,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (1/1) ... [2023-11-06 21:58:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:51,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:58:51,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:58:51,188 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-06 21:58:51,188 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-06 21:58:51,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:58:51,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:58:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:58:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:58:51,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:58:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:58:51,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 21:58:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:58:51,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:58:51,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:58:51,355 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:58:51,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:51,398 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-06 21:58:51,776 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:51,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:51,788 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-06 21:58:51,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:51 BoogieIcfgContainer [2023-11-06 21:58:51,791 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:51,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:51,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:51,798 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:51,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:50" (1/3) ... [2023-11-06 21:58:51,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f7d6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:51, skipping insertion in model container [2023-11-06 21:58:51,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:51" (2/3) ... [2023-11-06 21:58:51,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f7d6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:51, skipping insertion in model container [2023-11-06 21:58:51,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:51" (3/3) ... [2023-11-06 21:58:51,804 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2023-11-06 21:58:51,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:51,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-11-06 21:58:51,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:51,892 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;@7d34edc7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:51,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2023-11-06 21:58:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 119 states have internal predecessors, (145), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:58:51,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:51,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:51,908 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:51,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1083078, now seen corresponding path program 1 times [2023-11-06 21:58:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317402652] [2023-11-06 21:58:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:52,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317402652] [2023-11-06 21:58:52,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317402652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:52,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:52,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:52,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739498689] [2023-11-06 21:58:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:52,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:58:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:58:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:58:52,215 INFO L87 Difference]: Start difference. First operand has 121 states, 76 states have (on average 1.9078947368421053) internal successors, (145), 119 states have internal predecessors, (145), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:52,241 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2023-11-06 21:58:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:58:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-06 21:58:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:52,250 INFO L225 Difference]: With dead ends: 120 [2023-11-06 21:58:52,250 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 21:58:52,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:58:52,255 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:52,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 21:58:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-06 21:58:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 72 states have (on average 1.7638888888888888) internal successors, (127), 113 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) [2023-11-06 21:58:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2023-11-06 21:58:52,296 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 4 [2023-11-06 21:58:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:52,297 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2023-11-06 21:58:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2023-11-06 21:58:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:58:52,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:52,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:58:52,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:52,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1079730, now seen corresponding path program 1 times [2023-11-06 21:58:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362188097] [2023-11-06 21:58:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:52,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362188097] [2023-11-06 21:58:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362188097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:52,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016539140] [2023-11-06 21:58:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:52,428 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:52,527 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2023-11-06 21:58:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-06 21:58:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:52,530 INFO L225 Difference]: With dead ends: 139 [2023-11-06 21:58:52,530 INFO L226 Difference]: Without dead ends: 139 [2023-11-06 21:58:52,531 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 [2023-11-06 21:58:52,532 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 116 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 102 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 [2023-11-06 21:58:52,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 102 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-06 21:58:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2023-11-06 21:58:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.7361111111111112) internal successors, (125), 111 states have internal predecessors, (125), 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) [2023-11-06 21:58:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2023-11-06 21:58:52,548 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 4 [2023-11-06 21:58:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:52,549 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2023-11-06 21:58:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2023-11-06 21:58:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:58:52,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:52,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:58:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:58:52,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:52,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1079731, now seen corresponding path program 1 times [2023-11-06 21:58:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908067365] [2023-11-06 21:58:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908067365] [2023-11-06 21:58:52,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908067365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:52,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:52,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139385587] [2023-11-06 21:58:52,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:52,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:52,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:52,646 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:52,680 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2023-11-06 21:58:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-06 21:58:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:52,683 INFO L225 Difference]: With dead ends: 160 [2023-11-06 21:58:52,683 INFO L226 Difference]: Without dead ends: 160 [2023-11-06 21:58:52,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:52,685 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 52 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:52,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 232 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-06 21:58:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 113. [2023-11-06 21:58:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.726027397260274) internal successors, (126), 112 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) [2023-11-06 21:58:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2023-11-06 21:58:52,697 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 4 [2023-11-06 21:58:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:52,697 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2023-11-06 21:58:52,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-06 21:58:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2023-11-06 21:58:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:58:52,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:52,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:58:52,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:52,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash -336207078, now seen corresponding path program 1 times [2023-11-06 21:58:52,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:52,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312674658] [2023-11-06 21:58:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312674658] [2023-11-06 21:58:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312674658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788234080] [2023-11-06 21:58:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:52,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:52,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:52,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:58:52,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:53,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788234080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:53,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:53,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 21:58:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043565660] [2023-11-06 21:58:53,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:53,051 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2023-11-06 21:58:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:53,193 INFO L93 Difference]: Finished difference Result 249 states and 273 transitions. [2023-11-06 21:58:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 9 [2023-11-06 21:58:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:53,197 INFO L225 Difference]: With dead ends: 249 [2023-11-06 21:58:53,197 INFO L226 Difference]: Without dead ends: 249 [2023-11-06 21:58:53,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:53,199 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 406 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:53,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 515 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-06 21:58:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2023-11-06 21:58:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 136 states have (on average 1.7352941176470589) internal successors, (236), 175 states have internal predecessors, (236), 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) [2023-11-06 21:58:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 236 transitions. [2023-11-06 21:58:53,228 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 236 transitions. Word has length 9 [2023-11-06 21:58:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:53,228 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 236 transitions. [2023-11-06 21:58:53,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2023-11-06 21:58:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 236 transitions. [2023-11-06 21:58:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:58:53,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:53,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:53,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:53,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:53,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:53,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash -991177183, now seen corresponding path program 1 times [2023-11-06 21:58:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:53,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121494259] [2023-11-06 21:58:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:53,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:53,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121494259] [2023-11-06 21:58:53,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121494259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:53,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:53,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31380643] [2023-11-06 21:58:53,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:53,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:53,538 INFO L87 Difference]: Start difference. First operand 176 states and 236 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-06 21:58:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:53,622 INFO L93 Difference]: Finished difference Result 175 states and 233 transitions. [2023-11-06 21:58:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 11 [2023-11-06 21:58:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:53,624 INFO L225 Difference]: With dead ends: 175 [2023-11-06 21:58:53,625 INFO L226 Difference]: Without dead ends: 175 [2023-11-06 21:58:53,625 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 [2023-11-06 21:58:53,626 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:53,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 198 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-06 21:58:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-06 21:58:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.713235294117647) internal successors, (233), 174 states have internal predecessors, (233), 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) [2023-11-06 21:58:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 233 transitions. [2023-11-06 21:58:53,637 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 233 transitions. Word has length 11 [2023-11-06 21:58:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:53,638 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 233 transitions. [2023-11-06 21:58:53,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-06 21:58:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 233 transitions. [2023-11-06 21:58:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:58:53,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:53,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:53,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:58:53,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:53,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash -991177182, now seen corresponding path program 1 times [2023-11-06 21:58:53,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:53,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258389470] [2023-11-06 21:58:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:53,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:53,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258389470] [2023-11-06 21:58:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258389470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:53,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113403768] [2023-11-06 21:58:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:53,851 INFO L87 Difference]: Start difference. First operand 175 states and 233 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-06 21:58:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:53,916 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2023-11-06 21:58:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:53,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 11 [2023-11-06 21:58:53,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:53,918 INFO L225 Difference]: With dead ends: 174 [2023-11-06 21:58:53,918 INFO L226 Difference]: Without dead ends: 174 [2023-11-06 21:58:53,919 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 [2023-11-06 21:58:53,920 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:53,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 202 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-06 21:58:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-11-06 21:58:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 136 states have (on average 1.6911764705882353) internal successors, (230), 173 states have internal predecessors, (230), 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) [2023-11-06 21:58:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 230 transitions. [2023-11-06 21:58:53,935 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 230 transitions. Word has length 11 [2023-11-06 21:58:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:53,935 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 230 transitions. [2023-11-06 21:58:53,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2023-11-06 21:58:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 230 transitions. [2023-11-06 21:58:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:58:53,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:53,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:58:53,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:53,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -661772220, now seen corresponding path program 1 times [2023-11-06 21:58:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:53,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893625071] [2023-11-06 21:58:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893625071] [2023-11-06 21:58:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893625071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:54,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111838972] [2023-11-06 21:58:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:54,026 INFO L87 Difference]: Start difference. First operand 174 states and 230 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-11-06 21:58:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:54,104 INFO L93 Difference]: Finished difference Result 172 states and 224 transitions. [2023-11-06 21:58:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:54,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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 [2023-11-06 21:58:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:54,106 INFO L225 Difference]: With dead ends: 172 [2023-11-06 21:58:54,107 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 21:58:54,107 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 [2023-11-06 21:58:54,110 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 9 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:54,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 183 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 21:58:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-11-06 21:58:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 136 states have (on average 1.6470588235294117) internal successors, (224), 171 states have internal predecessors, (224), 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) [2023-11-06 21:58:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 224 transitions. [2023-11-06 21:58:54,127 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 224 transitions. Word has length 12 [2023-11-06 21:58:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:54,128 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 224 transitions. [2023-11-06 21:58:54,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 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) [2023-11-06 21:58:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 224 transitions. [2023-11-06 21:58:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:58:54,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:54,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:54,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:58:54,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:54,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash -661772219, now seen corresponding path program 1 times [2023-11-06 21:58:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631763852] [2023-11-06 21:58:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631763852] [2023-11-06 21:58:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631763852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:54,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:54,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274168807] [2023-11-06 21:58:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:54,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:54,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:54,276 INFO L87 Difference]: Start difference. First operand 172 states and 224 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2023-11-06 21:58:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:54,363 INFO L93 Difference]: Finished difference Result 246 states and 306 transitions. [2023-11-06 21:58:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2023-11-06 21:58:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:54,365 INFO L225 Difference]: With dead ends: 246 [2023-11-06 21:58:54,365 INFO L226 Difference]: Without dead ends: 246 [2023-11-06 21:58:54,366 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 [2023-11-06 21:58:54,367 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 137 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:54,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 556 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-06 21:58:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 175. [2023-11-06 21:58:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 139 states have (on average 1.6330935251798562) internal successors, (227), 174 states have internal predecessors, (227), 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) [2023-11-06 21:58:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 227 transitions. [2023-11-06 21:58:54,382 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 227 transitions. Word has length 12 [2023-11-06 21:58:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 227 transitions. [2023-11-06 21:58:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2023-11-06 21:58:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 227 transitions. [2023-11-06 21:58:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:58:54,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:54,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:58:54,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:54,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash -51661170, now seen corresponding path program 1 times [2023-11-06 21:58:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:54,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324011198] [2023-11-06 21:58:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:54,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324011198] [2023-11-06 21:58:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324011198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684843734] [2023-11-06 21:58:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:54,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:54,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:54,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:58:54,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684843734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:54,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-11-06 21:58:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641239120] [2023-11-06 21:58:54,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:54,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:58:54,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:58:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:54,744 INFO L87 Difference]: Start difference. First operand 175 states and 227 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-06 21:58:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:54,859 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2023-11-06 21:58:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:58:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 [2023-11-06 21:58:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:54,862 INFO L225 Difference]: With dead ends: 261 [2023-11-06 21:58:54,862 INFO L226 Difference]: Without dead ends: 261 [2023-11-06 21:58:54,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:54,865 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 291 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:54,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 558 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-06 21:58:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 199. [2023-11-06 21:58:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 163 states have (on average 1.539877300613497) internal successors, (251), 198 states have internal predecessors, (251), 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) [2023-11-06 21:58:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2023-11-06 21:58:54,872 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 16 [2023-11-06 21:58:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:54,873 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2023-11-06 21:58:54,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-06 21:58:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2023-11-06 21:58:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 21:58:54,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:54,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-06 21:58:54,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:55,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:55,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:55,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:55,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1254577850, now seen corresponding path program 2 times [2023-11-06 21:58:55,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:55,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541854013] [2023-11-06 21:58:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:55,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:58:55,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:55,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541854013] [2023-11-06 21:58:55,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541854013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:55,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:55,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:58:55,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747267965] [2023-11-06 21:58:55,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:55,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:58:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:55,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:58:55,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:58:55,167 INFO L87 Difference]: Start difference. First operand 199 states and 251 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) [2023-11-06 21:58:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:55,229 INFO L93 Difference]: Finished difference Result 197 states and 249 transitions. [2023-11-06 21:58:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:58:55,229 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 19 [2023-11-06 21:58:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:55,231 INFO L225 Difference]: With dead ends: 197 [2023-11-06 21:58:55,231 INFO L226 Difference]: Without dead ends: 197 [2023-11-06 21:58:55,232 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 [2023-11-06 21:58:55,232 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 107 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:55,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 86 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-06 21:58:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-06 21:58:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 163 states have (on average 1.5276073619631902) internal successors, (249), 196 states have internal predecessors, (249), 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) [2023-11-06 21:58:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 249 transitions. [2023-11-06 21:58:55,240 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 249 transitions. Word has length 19 [2023-11-06 21:58:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:55,240 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 249 transitions. [2023-11-06 21:58:55,240 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) [2023-11-06 21:58:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 249 transitions. [2023-11-06 21:58:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 21:58:55,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:55,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:55,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:58:55,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:55,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1535685581, now seen corresponding path program 1 times [2023-11-06 21:58:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299408839] [2023-11-06 21:58:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:55,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:58:55,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:55,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299408839] [2023-11-06 21:58:55,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299408839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:55,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:55,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548144716] [2023-11-06 21:58:55,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:55,373 INFO L87 Difference]: Start difference. First operand 197 states and 249 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-06 21:58:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:55,469 INFO L93 Difference]: Finished difference Result 261 states and 322 transitions. [2023-11-06 21:58:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 24 [2023-11-06 21:58:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:55,471 INFO L225 Difference]: With dead ends: 261 [2023-11-06 21:58:55,472 INFO L226 Difference]: Without dead ends: 261 [2023-11-06 21:58:55,472 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 [2023-11-06 21:58:55,473 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 104 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:55,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 387 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-06 21:58:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 216. [2023-11-06 21:58:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.510989010989011) internal successors, (275), 215 states have internal predecessors, (275), 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) [2023-11-06 21:58:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2023-11-06 21:58:55,484 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 24 [2023-11-06 21:58:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:55,484 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2023-11-06 21:58:55,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-06 21:58:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2023-11-06 21:58:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 21:58:55,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:55,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:58:55,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:55,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash 877276576, now seen corresponding path program 2 times [2023-11-06 21:58:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250872155] [2023-11-06 21:58:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:58:55,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:55,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250872155] [2023-11-06 21:58:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250872155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:55,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849180639] [2023-11-06 21:58:55,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:55,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:55,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:55,791 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:55,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:58:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:55,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:58:55,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:55,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:58:55,984 INFO L351 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 [2023-11-06 21:58:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:56,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:56,051 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 21:58:56,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-06 21:58:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:56,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:56,112 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 21:58:56,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 21:58:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:56,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:56,234 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-06 21:58:56,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-06 21:58:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:56,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:57,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849180639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:57,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:57,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-06 21:58:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42910615] [2023-11-06 21:58:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:58:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:58:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:58:57,079 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 11 states, 10 states have (on average 5.8) internal successors, (58), 11 states have internal predecessors, (58), 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) [2023-11-06 21:58:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:57,330 INFO L93 Difference]: Finished difference Result 214 states and 269 transitions. [2023-11-06 21:58:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:58:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 11 states have internal predecessors, (58), 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 24 [2023-11-06 21:58:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:57,332 INFO L225 Difference]: With dead ends: 214 [2023-11-06 21:58:57,332 INFO L226 Difference]: Without dead ends: 214 [2023-11-06 21:58:57,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:57,333 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 21 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 373 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:58:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-06 21:58:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-06 21:58:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 182 states have (on average 1.478021978021978) internal successors, (269), 213 states have internal predecessors, (269), 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) [2023-11-06 21:58:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 269 transitions. [2023-11-06 21:58:57,339 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 269 transitions. Word has length 24 [2023-11-06 21:58:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:57,340 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 269 transitions. [2023-11-06 21:58:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.8) internal successors, (58), 11 states have internal predecessors, (58), 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) [2023-11-06 21:58:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 269 transitions. [2023-11-06 21:58:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:58:57,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:57,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:57,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:57,547 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:57,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 361637955, now seen corresponding path program 1 times [2023-11-06 21:58:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:57,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934318680] [2023-11-06 21:58:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:58:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:57,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934318680] [2023-11-06 21:58:57,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934318680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:57,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155239612] [2023-11-06 21:58:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:57,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:57,680 INFO L87 Difference]: Start difference. First operand 214 states and 269 transitions. Second operand has 5 states, 5 states have (on average 3.0) 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) [2023-11-06 21:58:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:57,774 INFO L93 Difference]: Finished difference Result 234 states and 289 transitions. [2023-11-06 21:58:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) 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 25 [2023-11-06 21:58:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:57,776 INFO L225 Difference]: With dead ends: 234 [2023-11-06 21:58:57,776 INFO L226 Difference]: Without dead ends: 234 [2023-11-06 21:58:57,776 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 [2023-11-06 21:58:57,777 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 12 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:57,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 414 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-06 21:58:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2023-11-06 21:58:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 186 states have (on average 1.467741935483871) internal successors, (273), 217 states have internal predecessors, (273), 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) [2023-11-06 21:58:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 273 transitions. [2023-11-06 21:58:57,784 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 273 transitions. Word has length 25 [2023-11-06 21:58:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:57,784 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 273 transitions. [2023-11-06 21:58:57,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) 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) [2023-11-06 21:58:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 273 transitions. [2023-11-06 21:58:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:58:57,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:57,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:58:57,786 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:57,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1674125762, now seen corresponding path program 1 times [2023-11-06 21:58:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558396921] [2023-11-06 21:58:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:58:57,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:57,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558396921] [2023-11-06 21:58:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558396921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:57,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:57,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:58:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062932146] [2023-11-06 21:58:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:57,867 INFO L87 Difference]: Start difference. First operand 218 states and 273 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) 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) [2023-11-06 21:58:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:57,949 INFO L93 Difference]: Finished difference Result 220 states and 274 transitions. [2023-11-06 21:58:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:57,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) 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 26 [2023-11-06 21:58:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:57,952 INFO L225 Difference]: With dead ends: 220 [2023-11-06 21:58:57,952 INFO L226 Difference]: Without dead ends: 212 [2023-11-06 21:58:57,952 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 [2023-11-06 21:58:57,953 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:57,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 269 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-06 21:58:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2023-11-06 21:58:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 178 states have (on average 1.4831460674157304) internal successors, (264), 209 states have internal predecessors, (264), 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) [2023-11-06 21:58:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 264 transitions. [2023-11-06 21:58:57,959 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 264 transitions. Word has length 26 [2023-11-06 21:58:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:57,959 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 264 transitions. [2023-11-06 21:58:57,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) 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) [2023-11-06 21:58:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 264 transitions. [2023-11-06 21:58:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 21:58:57,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:57,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:57,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 21:58:57,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:57,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash -981051253, now seen corresponding path program 1 times [2023-11-06 21:58:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009318219] [2023-11-06 21:58:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:58:58,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:58,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009318219] [2023-11-06 21:58:58,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009318219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:58,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:58,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:58,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835333236] [2023-11-06 21:58:58,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:58,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:58,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:58,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:58,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:58,052 INFO L87 Difference]: Start difference. First operand 210 states and 264 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-11-06 21:58:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:58,175 INFO L93 Difference]: Finished difference Result 236 states and 290 transitions. [2023-11-06 21:58:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 [2023-11-06 21:58:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:58,177 INFO L225 Difference]: With dead ends: 236 [2023-11-06 21:58:58,177 INFO L226 Difference]: Without dead ends: 236 [2023-11-06 21:58:58,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:58:58,178 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 128 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:58,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 256 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-06 21:58:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2023-11-06 21:58:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 178 states have (on average 1.4662921348314606) internal successors, (261), 208 states have internal predecessors, (261), 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) [2023-11-06 21:58:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 261 transitions. [2023-11-06 21:58:58,183 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 261 transitions. Word has length 29 [2023-11-06 21:58:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 261 transitions. [2023-11-06 21:58:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2023-11-06 21:58:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 261 transitions. [2023-11-06 21:58:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 21:58:58,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:58,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 21:58:58,185 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:58,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -981051252, now seen corresponding path program 1 times [2023-11-06 21:58:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859291843] [2023-11-06 21:58:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:58:58,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859291843] [2023-11-06 21:58:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859291843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:58,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:58,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100284488] [2023-11-06 21:58:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:58,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:58,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:58,360 INFO L87 Difference]: Start difference. First operand 209 states and 261 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-06 21:58:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:58,473 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2023-11-06 21:58:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 [2023-11-06 21:58:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:58,476 INFO L225 Difference]: With dead ends: 208 [2023-11-06 21:58:58,476 INFO L226 Difference]: Without dead ends: 208 [2023-11-06 21:58:58,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:58,477 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 131 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:58,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 257 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-06 21:58:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-06 21:58:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 178 states have (on average 1.449438202247191) internal successors, (258), 207 states have internal predecessors, (258), 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) [2023-11-06 21:58:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2023-11-06 21:58:58,484 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 29 [2023-11-06 21:58:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:58,485 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2023-11-06 21:58:58,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-06 21:58:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2023-11-06 21:58:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:58:58,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:58,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:58,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 21:58:58,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:58:58,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash -347817722, now seen corresponding path program 1 times [2023-11-06 21:58:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:58,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850410233] [2023-11-06 21:58:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:58:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:59,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850410233] [2023-11-06 21:58:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850410233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:59,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312039352] [2023-11-06 21:58:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:59,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:59,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:59,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:58:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:58:59,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:59,269 INFO L351 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 [2023-11-06 21:58:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:59,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:59,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:59,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:59,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:58:59,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-06 21:58:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:58:59,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:59:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312039352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-11-06 21:59:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296827575] [2023-11-06 21:59:06,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:06,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:59:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:59:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:59:06,150 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 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) [2023-11-06 21:59:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:06,381 INFO L93 Difference]: Finished difference Result 233 states and 281 transitions. [2023-11-06 21:59:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:59:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 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 30 [2023-11-06 21:59:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:06,383 INFO L225 Difference]: With dead ends: 233 [2023-11-06 21:59:06,383 INFO L226 Difference]: Without dead ends: 233 [2023-11-06 21:59:06,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:59:06,384 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 426 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:06,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 261 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:59:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-06 21:59:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 206. [2023-11-06 21:59:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 178 states have (on average 1.4157303370786516) internal successors, (252), 205 states have internal predecessors, (252), 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) [2023-11-06 21:59:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 252 transitions. [2023-11-06 21:59:06,389 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 252 transitions. Word has length 30 [2023-11-06 21:59:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:06,390 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 252 transitions. [2023-11-06 21:59:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.666666666666667) internal successors, (80), 13 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) [2023-11-06 21:59:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 252 transitions. [2023-11-06 21:59:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:59:06,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:06,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:06,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:59:06,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:06,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -347817723, now seen corresponding path program 1 times [2023-11-06 21:59:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637077691] [2023-11-06 21:59:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:59:06,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637077691] [2023-11-06 21:59:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637077691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749247120] [2023-11-06 21:59:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:06,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:06,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:07,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:59:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:07,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:59:07,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:07,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:07,163 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 21:59:07,164 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-06 21:59:07,217 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 21:59:07,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-06 21:59:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:07,327 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-06 21:59:07,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-06 21:59:07,373 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 21:59:07,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-06 21:59:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:07,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749247120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:07,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2023-11-06 21:59:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140970376] [2023-11-06 21:59:07,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:59:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:59:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:59:07,804 INFO L87 Difference]: Start difference. First operand 206 states and 252 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 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) [2023-11-06 21:59:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:07,981 INFO L93 Difference]: Finished difference Result 231 states and 275 transitions. [2023-11-06 21:59:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:59:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 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 [2023-11-06 21:59:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:07,983 INFO L225 Difference]: With dead ends: 231 [2023-11-06 21:59:07,983 INFO L226 Difference]: Without dead ends: 231 [2023-11-06 21:59:07,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:59:07,984 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 296 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:07,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 241 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-06 21:59:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-11-06 21:59:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 178 states have (on average 1.3820224719101124) internal successors, (246), 203 states have internal predecessors, (246), 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) [2023-11-06 21:59:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 246 transitions. [2023-11-06 21:59:07,993 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 246 transitions. Word has length 30 [2023-11-06 21:59:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:07,993 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 246 transitions. [2023-11-06 21:59:07,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 13 states have internal predecessors, (65), 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) [2023-11-06 21:59:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 246 transitions. [2023-11-06 21:59:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 21:59:07,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:07,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:08,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:08,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:59:08,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:08,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1918350099, now seen corresponding path program 1 times [2023-11-06 21:59:08,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:08,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520920303] [2023-11-06 21:59:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:59:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520920303] [2023-11-06 21:59:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520920303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246809531] [2023-11-06 21:59:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:09,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:09,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:09,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:59:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:09,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 21:59:09,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:09,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 21:59:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:59:09,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:09,988 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~new_last~0#1.base| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)) (forall ((v_ArrVal_503 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~new_last~0#1.base| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) is different from false [2023-11-06 21:59:10,146 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int)) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (forall ((v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int)) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))) is different from false [2023-11-06 21:59:10,396 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))) is different from false [2023-11-06 21:59:12,874 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_496 (Array Int Int))) (or (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_496) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_495 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))))) is different from false [2023-11-06 21:59:14,977 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_496 (Array Int Int))) (or (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_496) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)))))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_495 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))))))) is different from false [2023-11-06 21:59:17,121 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_493 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_495 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_493) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))))))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_494 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_496 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_494) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_496) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0)))))))) is different from false [2023-11-06 21:59:19,280 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| Int)) (or (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_494 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_496 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| v_ArrVal_494) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_496) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_498) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0))))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| 1)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| Int)) (or (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_493 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_495 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| v_ArrVal_493) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_497) |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 0) (< |c_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|))))))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| 1))))) is different from false [2023-11-06 21:59:21,645 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_494 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_496 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1)) (forall ((v_ArrVal_501 (Array Int Int)) (v_ArrVal_504 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_498 (Array Int Int))) (or (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| v_ArrVal_494) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_496) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_498) |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| v_ArrVal_501) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_504) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0) (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|))))))))))) (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| Int) (v_ArrVal_493 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| 1)) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| Int) (v_ArrVal_495 (Array Int Int))) (or (forall ((v_ArrVal_502 (Array Int Int)) (v_ArrVal_503 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| Int) (v_ArrVal_497 (Array Int Int))) (or (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15|) (= (select (select (store (store (store (store (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_34| v_ArrVal_493) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_33| v_ArrVal_495) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| v_ArrVal_497) |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| v_ArrVal_502) |v_ULTIMATE.start_sll_append_~new_last~0#1.base_15| v_ArrVal_503) |c_ULTIMATE.start_main_~#head~1#1.base|) |c_ULTIMATE.start_main_~#head~1#1.offset|) 0))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_sll_create_~new_head~0#1.base_32| 1))))))))))) is different from false [2023-11-06 21:59:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2023-11-06 21:59:22,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246809531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:22,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:22,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 16] total 31 [2023-11-06 21:59:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134903093] [2023-11-06 21:59:22,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:22,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 21:59:22,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 21:59:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=405, Unknown=25, NotChecked=392, Total=930 [2023-11-06 21:59:22,139 INFO L87 Difference]: Start difference. First operand 204 states and 246 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 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) [2023-11-06 21:59:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:23,245 INFO L93 Difference]: Finished difference Result 288 states and 333 transitions. [2023-11-06 21:59:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:59:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 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 33 [2023-11-06 21:59:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:23,247 INFO L225 Difference]: With dead ends: 288 [2023-11-06 21:59:23,247 INFO L226 Difference]: Without dead ends: 288 [2023-11-06 21:59:23,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=200, Invalid=676, Unknown=26, NotChecked=504, Total=1406 [2023-11-06 21:59:23,249 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 55 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:23,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1791 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 362 Invalid, 0 Unknown, 423 Unchecked, 0.4s Time] [2023-11-06 21:59:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-06 21:59:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2023-11-06 21:59:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 256 states have (on average 1.27734375) internal successors, (327), 281 states have internal predecessors, (327), 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) [2023-11-06 21:59:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 327 transitions. [2023-11-06 21:59:23,257 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 327 transitions. Word has length 33 [2023-11-06 21:59:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:23,257 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 327 transitions. [2023-11-06 21:59:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 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) [2023-11-06 21:59:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 327 transitions. [2023-11-06 21:59:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:59:23,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:23,258 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:23,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:23,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:23,465 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:23,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1545942185, now seen corresponding path program 1 times [2023-11-06 21:59:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519573733] [2023-11-06 21:59:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 21:59:23,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:23,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519573733] [2023-11-06 21:59:23,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519573733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:23,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:23,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:59:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601023398] [2023-11-06 21:59:23,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:59:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:59:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:59:23,831 INFO L87 Difference]: Start difference. First operand 282 states and 327 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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) [2023-11-06 21:59:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:24,159 INFO L93 Difference]: Finished difference Result 453 states and 521 transitions. [2023-11-06 21:59:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:59:24,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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 56 [2023-11-06 21:59:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:24,164 INFO L225 Difference]: With dead ends: 453 [2023-11-06 21:59:24,164 INFO L226 Difference]: Without dead ends: 453 [2023-11-06 21:59:24,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:59:24,165 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 264 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:24,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 406 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:59:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-06 21:59:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 308. [2023-11-06 21:59:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 283 states have (on average 1.2862190812720848) internal successors, (364), 307 states have internal predecessors, (364), 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) [2023-11-06 21:59:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 364 transitions. [2023-11-06 21:59:24,175 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 364 transitions. Word has length 56 [2023-11-06 21:59:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:24,176 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 364 transitions. [2023-11-06 21:59:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 9 states have internal predecessors, (40), 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) [2023-11-06 21:59:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 364 transitions. [2023-11-06 21:59:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:59:24,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:24,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 21:59:24,178 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:24,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1545942186, now seen corresponding path program 1 times [2023-11-06 21:59:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564645122] [2023-11-06 21:59:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:24,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:24,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564645122] [2023-11-06 21:59:24,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564645122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:24,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637081817] [2023-11-06 21:59:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:24,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:24,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:24,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:24,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:59:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:24,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:59:24,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:24,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:24,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637081817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:24,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:24,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2023-11-06 21:59:24,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859750925] [2023-11-06 21:59:24,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:24,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:59:24,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:24,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:59:24,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:59:24,776 INFO L87 Difference]: Start difference. First operand 308 states and 364 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2023-11-06 21:59:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:25,029 INFO L93 Difference]: Finished difference Result 408 states and 461 transitions. [2023-11-06 21:59:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:59:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) Word has length 56 [2023-11-06 21:59:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:25,032 INFO L225 Difference]: With dead ends: 408 [2023-11-06 21:59:25,032 INFO L226 Difference]: Without dead ends: 408 [2023-11-06 21:59:25,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:59:25,034 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 392 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:25,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1040 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-06 21:59:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 353. [2023-11-06 21:59:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 328 states have (on average 1.2896341463414633) internal successors, (423), 352 states have internal predecessors, (423), 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) [2023-11-06 21:59:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 423 transitions. [2023-11-06 21:59:25,043 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 423 transitions. Word has length 56 [2023-11-06 21:59:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:25,043 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 423 transitions. [2023-11-06 21:59:25,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2023-11-06 21:59:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 423 transitions. [2023-11-06 21:59:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 21:59:25,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:25,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:25,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 21:59:25,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:25,251 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:25,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash -276278870, now seen corresponding path program 2 times [2023-11-06 21:59:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:25,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045611165] [2023-11-06 21:59:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:25,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:59:25,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:25,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045611165] [2023-11-06 21:59:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045611165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:25,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:25,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:59:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828942239] [2023-11-06 21:59:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:25,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:59:25,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:59:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:59:25,743 INFO L87 Difference]: Start difference. First operand 353 states and 423 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 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) [2023-11-06 21:59:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:26,119 INFO L93 Difference]: Finished difference Result 523 states and 631 transitions. [2023-11-06 21:59:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:59:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 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 56 [2023-11-06 21:59:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:26,124 INFO L225 Difference]: With dead ends: 523 [2023-11-06 21:59:26,125 INFO L226 Difference]: Without dead ends: 523 [2023-11-06 21:59:26,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:59:26,125 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 224 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:26,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 591 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:59:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-06 21:59:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2023-11-06 21:59:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 361 states have (on average 1.3102493074792243) internal successors, (473), 385 states have internal predecessors, (473), 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) [2023-11-06 21:59:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 473 transitions. [2023-11-06 21:59:26,160 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 473 transitions. Word has length 56 [2023-11-06 21:59:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:26,160 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 473 transitions. [2023-11-06 21:59:26,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 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) [2023-11-06 21:59:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 473 transitions. [2023-11-06 21:59:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 21:59:26,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:26,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:26,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 21:59:26,162 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:26,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash 25314791, now seen corresponding path program 1 times [2023-11-06 21:59:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:26,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109930947] [2023-11-06 21:59:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:59:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109930947] [2023-11-06 21:59:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109930947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:59:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528564614] [2023-11-06 21:59:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:26,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:59:26,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:26,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:59:26,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:59:26,366 INFO L87 Difference]: Start difference. First operand 386 states and 473 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2023-11-06 21:59:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:26,570 INFO L93 Difference]: Finished difference Result 438 states and 543 transitions. [2023-11-06 21:59:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:59:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 57 [2023-11-06 21:59:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:26,573 INFO L225 Difference]: With dead ends: 438 [2023-11-06 21:59:26,573 INFO L226 Difference]: Without dead ends: 438 [2023-11-06 21:59:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:59:26,574 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 526 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-06 21:59:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 424. [2023-11-06 21:59:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 399 states have (on average 1.3358395989974938) internal successors, (533), 423 states have internal predecessors, (533), 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) [2023-11-06 21:59:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 533 transitions. [2023-11-06 21:59:26,585 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 533 transitions. Word has length 57 [2023-11-06 21:59:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:26,585 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 533 transitions. [2023-11-06 21:59:26,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) [2023-11-06 21:59:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 533 transitions. [2023-11-06 21:59:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 21:59:26,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:26,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 21:59:26,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:26,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 25335514, now seen corresponding path program 1 times [2023-11-06 21:59:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636584714] [2023-11-06 21:59:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 21:59:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636584714] [2023-11-06 21:59:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636584714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:26,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:26,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:59:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206312713] [2023-11-06 21:59:26,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:26,687 INFO L87 Difference]: Start difference. First operand 424 states and 533 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-06 21:59:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:26,727 INFO L93 Difference]: Finished difference Result 485 states and 602 transitions. [2023-11-06 21:59:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:59:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 57 [2023-11-06 21:59:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:26,731 INFO L225 Difference]: With dead ends: 485 [2023-11-06 21:59:26,731 INFO L226 Difference]: Without dead ends: 485 [2023-11-06 21:59:26,732 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 [2023-11-06 21:59:26,733 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 202 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:26,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 192 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-11-06 21:59:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 422. [2023-11-06 21:59:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 397 states have (on average 1.3299748110831233) internal successors, (528), 421 states have internal predecessors, (528), 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) [2023-11-06 21:59:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 528 transitions. [2023-11-06 21:59:26,744 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 528 transitions. Word has length 57 [2023-11-06 21:59:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 528 transitions. [2023-11-06 21:59:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2023-11-06 21:59:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 528 transitions. [2023-11-06 21:59:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 21:59:26,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:26,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 21:59:26,746 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:26,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash 784758042, now seen corresponding path program 1 times [2023-11-06 21:59:26,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:26,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108743633] [2023-11-06 21:59:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:59:27,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:27,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108743633] [2023-11-06 21:59:27,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108743633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:27,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:59:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651202113] [2023-11-06 21:59:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:59:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:59:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:59:27,060 INFO L87 Difference]: Start difference. First operand 422 states and 528 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2023-11-06 21:59:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:27,281 INFO L93 Difference]: Finished difference Result 526 states and 647 transitions. [2023-11-06 21:59:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:59:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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 58 [2023-11-06 21:59:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:27,284 INFO L225 Difference]: With dead ends: 526 [2023-11-06 21:59:27,284 INFO L226 Difference]: Without dead ends: 526 [2023-11-06 21:59:27,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:59:27,285 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 155 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:27,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 618 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-06 21:59:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 422. [2023-11-06 21:59:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 397 states have (on average 1.3173803526448362) internal successors, (523), 421 states have internal predecessors, (523), 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) [2023-11-06 21:59:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 523 transitions. [2023-11-06 21:59:27,297 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 523 transitions. Word has length 58 [2023-11-06 21:59:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:27,297 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 523 transitions. [2023-11-06 21:59:27,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 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) [2023-11-06 21:59:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 523 transitions. [2023-11-06 21:59:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:59:27,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:27,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-06 21:59:27,299 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2023-11-06 21:59:27,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1466385390, now seen corresponding path program 1 times [2023-11-06 21:59:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:27,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374252907] [2023-11-06 21:59:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 21:59:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374252907] [2023-11-06 21:59:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374252907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401365201] [2023-11-06 21:59:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:28,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:28,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:28,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5032006c-7012-4676-a7f0-9a12faacbf84/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:29,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 21:59:29,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:29,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:29,076 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 21:59:29,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 21:59:29,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:59:29,540 INFO L351 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 15 treesize of output 1 [2023-11-06 21:59:29,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 21:59:29,762 INFO L351 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 11 treesize of output 7 [2023-11-06 21:59:29,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 21:59:29,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-06 21:59:29,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 31 [2023-11-06 21:59:30,550 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:59:30,550 INFO L351 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 33 [2023-11-06 21:59:30,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-06 21:59:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 21:59:30,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:31,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:31,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1424 treesize of output 1405