./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 0e0057cc 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_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:02:41,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:02:41,802 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2023-12-02 20:02:41,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:02:41,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:02:41,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:02:41,845 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:02:41,845 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:02:41,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:02:41,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:02:41,847 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:02:41,848 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:02:41,848 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:02:41,849 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:02:41,849 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:02:41,850 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:02:41,859 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:02:41,860 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:02:41,861 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:02:41,861 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:02:41,862 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:02:41,862 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:02:41,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:02:41,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:02:41,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:02:41,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:02:41,865 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:02:41,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:02:41,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:02:41,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:02:41,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:02:41,867 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:02:41,867 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:02:41,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:02:41,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:02:41,868 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:02:41,868 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:02:41,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:02:41,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:02:41,869 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:02:41,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:02:41,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:02:41,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:02:41,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:02:41,870 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:02:41,870 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:02:41,870 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:02:41,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:02:41,871 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:02:41,871 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:02:41,871 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:02:41,871 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2023-12-02 20:02:42,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:02:42,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:02:42,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:02:42,111 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:02:42,111 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:02:42,112 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-12-02 20:02:44,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:02:45,046 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:02:45,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-12-02 20:02:45,062 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/2bca24259/c056587454fc4009bfe002953c311255/FLAG338205334 [2023-12-02 20:02:45,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/2bca24259/c056587454fc4009bfe002953c311255 [2023-12-02 20:02:45,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:02:45,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:02:45,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:02:45,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:02:45,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:02:45,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a79625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45, skipping insertion in model container [2023-12-02 20:02:45,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:02:45,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:02:45,406 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:02:45,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:02:45,475 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:02:45,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45 WrapperNode [2023-12-02 20:02:45,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:02:45,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:02:45,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:02:45,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:02:45,483 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,525 INFO L138 Inliner]: procedures = 129, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 187 [2023-12-02 20:02:45,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:02:45,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:02:45,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:02:45,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:02:45,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:02:45,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:02:45,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:02:45,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:02:45,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (1/1) ... [2023-12-02 20:02:45,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:02:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:02:45,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:02:45,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:02:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 20:02:45,629 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 20:02:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:02:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:02:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 20:02:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:02:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-12-02 20:02:45,630 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-12-02 20:02:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:02:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:02:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 20:02:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:02:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:02:45,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:02:45,753 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:02:45,755 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:02:45,791 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 20:02:45,992 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:02:46,047 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:02:46,047 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-02 20:02:46,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:46 BoogieIcfgContainer [2023-12-02 20:02:46,049 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:02:46,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:02:46,052 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:02:46,055 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:02:46,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:02:45" (1/3) ... [2023-12-02 20:02:46,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4670e541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:46, skipping insertion in model container [2023-12-02 20:02:46,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:02:45" (2/3) ... [2023-12-02 20:02:46,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4670e541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:02:46, skipping insertion in model container [2023-12-02 20:02:46,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:02:46" (3/3) ... [2023-12-02 20:02:46,058 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-12-02 20:02:46,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:02:46,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 20:02:46,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:02:46,157 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=FINITE_AUTOMATA, 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;@8957b70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:02:46,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 20:02:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 35 states have (on average 1.6) internal successors, (56), 38 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:02:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:02:46,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:46,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:02:46,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:02:46,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash -632531752, now seen corresponding path program 1 times [2023-12-02 20:02:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188588320] [2023-12-02 20:02:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:46,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188588320] [2023-12-02 20:02:46,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188588320] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:02:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:02:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:02:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920758812] [2023-12-02 20:02:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:02:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:02:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:02:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:02:46,530 INFO L87 Difference]: Start difference. First operand has 43 states, 35 states have (on average 1.6) internal successors, (56), 38 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:02:46,599 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-12-02 20:02:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:02:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 20:02:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:02:46,608 INFO L225 Difference]: With dead ends: 48 [2023-12-02 20:02:46,608 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 20:02:46,610 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 [2023-12-02 20:02:46,614 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:02:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:02:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 20:02:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-12-02 20:02:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 34 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:02:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-12-02 20:02:46,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 14 [2023-12-02 20:02:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:02:46,654 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-12-02 20:02:46,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-12-02 20:02:46,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:02:46,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:46,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:02:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:02:46,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:02:46,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 826941586, now seen corresponding path program 1 times [2023-12-02 20:02:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:46,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549827256] [2023-12-02 20:02:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:46,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:46,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549827256] [2023-12-02 20:02:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549827256] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:02:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306010462] [2023-12-02 20:02:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:02:46,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:02:46,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:02:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:47,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:02:47,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:02:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:47,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:02:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306010462] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:02:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [94950550] [2023-12-02 20:02:47,218 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 20:02:47,218 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:02:47,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:02:47,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:02:47,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:02:47,919 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-12-02 20:02:47,965 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:02:48,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [94950550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:02:48,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:02:48,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 3, 4] total 18 [2023-12-02 20:02:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257809042] [2023-12-02 20:02:48,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:02:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 20:02:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 20:02:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-12-02 20:02:48,337 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:02:48,623 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-12-02 20:02:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:02:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 20:02:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:02:48,625 INFO L225 Difference]: With dead ends: 51 [2023-12-02 20:02:48,625 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 20:02:48,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-12-02 20:02:48,627 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:02:48,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 82 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:02:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 20:02:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-12-02 20:02:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:02:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2023-12-02 20:02:48,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 18 [2023-12-02 20:02:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:02:48,635 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2023-12-02 20:02:48,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2023-12-02 20:02:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 20:02:48,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:48,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:02:48,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:02:48,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:48,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:02:48,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash 380639624, now seen corresponding path program 1 times [2023-12-02 20:02:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:48,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082380075] [2023-12-02 20:02:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:48,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:02:48,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082380075] [2023-12-02 20:02:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082380075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:02:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875327840] [2023-12-02 20:02:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:48,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:02:48,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:02:48,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:02:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:49,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:02:49,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:02:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:02:49,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:02:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:02:49,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875327840] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:02:49,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790922968] [2023-12-02 20:02:49,130 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 20:02:49,130 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:02:49,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:02:49,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:02:49,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:02:50,058 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-12-02 20:02:50,487 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:02:57,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '475#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_3| Int) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3| Int) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_3| Int) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= |v_#memory_int_39| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0)))) (= |#memory_int| (store |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| (select (select |#memory_int| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)))) (= (select (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) 0) (= (store (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_3|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3| (store (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3| 0))) (= (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0 (select (select |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 0))) |v_#memory_int_73|) (= (select (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) 0) (= (store |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|) (store (select |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_3|) |v_sll_append_~head#1.offset_BEFORE_RETURN_3|)) 4))) |v_#memory_int_38|))) (exists ((|v_#memory_$Pointer$.base_64| (Array Int (Array Int Int))) (|v_#memory_int_73| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_64| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_4| Int) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4| Int) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_4| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_#memory_int_72| (Array Int (Array Int Int)))) (and (= (select (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) 0) (= |v_#memory_int_39| (store |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0 (select (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0)))) (= (select (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select (store |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.offset_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| 0))) (= (store |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_39| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0 (select (select |v_#memory_int_73| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 0))) |v_#memory_int_73|) (= (store (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select (store |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (store (select |v_#memory_$Pointer$.base_64| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_4|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|))) |#memory_$Pointer$.base|) (= |v_#memory_int_38| (store |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|) (store (select |v_#memory_int_72| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4 (select (select |v_#memory_int_38| (select (select |#memory_$Pointer$.base| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|)) 4)))) (= |#memory_int| (store |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_4| (store (select |v_#memory_int_73| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4| (select (select |#memory_int| |v_sll_append_~head#1.base_BEFORE_RETURN_4|) |v_sll_append_~head#1.offset_BEFORE_RETURN_4|))))))) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (exists ((|v_#valid_56| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_24| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_24|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_24|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_24|) 0) 0) (= (store |v_#valid_56| |v_ULTIMATE.start_main_~#head~1#1.base_24| 0) |#valid|))) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:02:57,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:02:57,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:02:57,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-02 20:02:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190515960] [2023-12-02 20:02:57,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:02:57,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:02:57,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:02:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=416, Unknown=2, NotChecked=0, Total=506 [2023-12-02 20:02:57,521 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:02:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:02:57,603 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2023-12-02 20:02:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:02:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-12-02 20:02:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:02:57,605 INFO L225 Difference]: With dead ends: 66 [2023-12-02 20:02:57,605 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 20:02:57,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=88, Invalid=416, Unknown=2, NotChecked=0, Total=506 [2023-12-02 20:02:57,607 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:02:57,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 148 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:02:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 20:02:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-12-02 20:02:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 20:02:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2023-12-02 20:02:57,615 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 21 [2023-12-02 20:02:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:02:57,615 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2023-12-02 20:02:57,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:02:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2023-12-02 20:02:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 20:02:57,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:57,617 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] [2023-12-02 20:02:57,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 20:02:57,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:57,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:02:57,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:57,819 INFO L85 PathProgramCache]: Analyzing trace with hash 794428564, now seen corresponding path program 2 times [2023-12-02 20:02:57,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:57,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359018511] [2023-12-02 20:02:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:57,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 20:02:58,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:58,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359018511] [2023-12-02 20:02:58,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359018511] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:02:58,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:02:58,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:02:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767755678] [2023-12-02 20:02:58,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:02:58,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:02:58,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:02:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:02:58,065 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:02:58,262 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2023-12-02 20:02:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:02:58,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-12-02 20:02:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:02:58,266 INFO L225 Difference]: With dead ends: 121 [2023-12-02 20:02:58,266 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 20:02:58,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:02:58,267 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 72 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:02:58,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 191 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:02:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 20:02:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 71. [2023-12-02 20:02:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 20:02:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-12-02 20:02:58,279 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 29 [2023-12-02 20:02:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:02:58,279 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-12-02 20:02:58,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:02:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-12-02 20:02:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 20:02:58,281 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:58,281 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] [2023-12-02 20:02:58,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 20:02:58,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:02:58,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1166027575, now seen corresponding path program 1 times [2023-12-02 20:02:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:58,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782964238] [2023-12-02 20:02:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:58,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 20:02:58,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782964238] [2023-12-02 20:02:58,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782964238] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:02:58,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962953967] [2023-12-02 20:02:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:58,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:58,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:02:58,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:02:58,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 20:02:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:58,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:02:58,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:02:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 20:02:58,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:02:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 20:02:58,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962953967] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:02:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997752713] [2023-12-02 20:02:58,740 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 20:02:58,740 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:02:58,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:02:58,741 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:02:58,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:02:59,557 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2023-12-02 20:03:01,151 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1997752713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 7, 7] total 27 [2023-12-02 20:03:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157937845] [2023-12-02 20:03:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 20:03:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 20:03:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-12-02 20:03:04,080 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:06,717 INFO L93 Difference]: Finished difference Result 172 states and 241 transitions. [2023-12-02 20:03:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 20:03:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-12-02 20:03:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:06,720 INFO L225 Difference]: With dead ends: 172 [2023-12-02 20:03:06,720 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 20:03:06,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-12-02 20:03:06,721 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:06,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 208 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 20:03:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 20:03:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 99. [2023-12-02 20:03:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 20:03:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2023-12-02 20:03:06,737 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 31 [2023-12-02 20:03:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:06,737 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2023-12-02 20:03:06,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 13 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2023-12-02 20:03:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 20:03:06,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:06,739 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] [2023-12-02 20:03:06,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 20:03:06,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:06,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1302541888, now seen corresponding path program 1 times [2023-12-02 20:03:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121116349] [2023-12-02 20:03:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:03:07,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121116349] [2023-12-02 20:03:07,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121116349] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84250984] [2023-12-02 20:03:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:07,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:07,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 20:03:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:07,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:03:07,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 20:03:07,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 20:03:07,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84250984] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:07,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721657451] [2023-12-02 20:03:07,427 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 20:03:07,428 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:07,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:07,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:07,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:08,347 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-12-02 20:03:08,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:40,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1503#(and (or (exists ((|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_8| Int) (|v_#memory_int_125| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| Int) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_#memory_int_124| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_8| Int)) (and (= |v_#memory_int_125| (store |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_125| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0)))) (= |v_#memory_int_38| (store |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 (select (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4)))) (= |v_#memory_int_39| (store |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 0)))) (= (store |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_int_124| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0))) |v_#memory_int_124|) (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) 0) (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) 0) (= |#memory_$Pointer$.offset| (store (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|))) (not (= |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| 0)) (or (not (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0)) (not (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) 0))) (= (store |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 (select (select |v_#memory_$Pointer$.base_106| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0))) |v_#memory_$Pointer$.base_106|) (= |#memory_int| (store |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (store (select |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_8|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_8|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_8|) |v_sll_append_~head#1.offset_BEFORE_RETURN_8|))))))) (exists ((|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int))) (|v_sll_append_~head#1.offset_BEFORE_RETURN_7| Int) (|v_#memory_int_125| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_106| (Array Int (Array Int Int))) (|v_#memory_int_38| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| Int) (|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int))) (|v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| Int) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_#memory_int_124| (Array Int (Array Int Int))) (|v_sll_append_~head#1.base_BEFORE_RETURN_7| Int)) (and (= |v_#memory_int_39| (store |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0)))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|))) (= (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) 0) (= |#memory_int| (store |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select |v_#memory_int_125| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|))))) (or (not (= 0 (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|))) (not (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) 0))) (= (store |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_123| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_124| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_int_124|) (= (store |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_124| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 (select (select |v_#memory_int_38| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4))) |v_#memory_int_38|) (not (= |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| 0)) (= |#memory_$Pointer$.offset| (store (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) (store (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|) 0))) (= (store |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (select |v_#memory_int_39| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_int_125| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_int_125|) (= (store |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.base_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 (select (select |v_#memory_$Pointer$.base_106| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0))) |v_#memory_$Pointer$.base_106|) (= (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) (select (select (store |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select |v_#memory_$Pointer$.base_106| |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) (select (select (store (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7| (store (store (select (store |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7| (store (select |v_#memory_$Pointer$.offset_105| |v_sll_append_sll_create_#res#1.base_BEFORE_RETURN_7|) 0 0)) |v_sll_append_~new_last~0#1.base_BEFORE_RETURN_7|) 4 0) 0 0)) |v_sll_append_~head#1.base_BEFORE_RETURN_7|) |v_sll_append_~head#1.offset_BEFORE_RETURN_7|)) 0)))) (<= 1 |#StackHeapBarrier|) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (exists ((|v_#valid_94| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_25| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_25|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_25|) 0) 0) (= (store |v_#valid_94| |v_ULTIMATE.start_main_~#head~1#1.base_25| 0) |#valid|) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_25|) 0)))) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:03:40,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-12-02 20:03:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564947572] [2023-12-02 20:03:40,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 20:03:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 20:03:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=921, Unknown=2, NotChecked=0, Total=1056 [2023-12-02 20:03:40,613 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:40,782 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2023-12-02 20:03:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:03:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-02 20:03:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:40,784 INFO L225 Difference]: With dead ends: 121 [2023-12-02 20:03:40,784 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 20:03:40,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=159, Invalid=1099, Unknown=2, NotChecked=0, Total=1260 [2023-12-02 20:03:40,786 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 73 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:40,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 201 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 20:03:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-12-02 20:03:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.3267326732673268) internal successors, (134), 101 states have internal predecessors, (134), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 20:03:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 151 transitions. [2023-12-02 20:03:40,798 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 151 transitions. Word has length 32 [2023-12-02 20:03:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:40,798 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 151 transitions. [2023-12-02 20:03:40,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:03:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 151 transitions. [2023-12-02 20:03:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 20:03:40,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:40,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:40,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 20:03:41,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:41,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:41,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1787500722, now seen corresponding path program 2 times [2023-12-02 20:03:41,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:41,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302021655] [2023-12-02 20:03:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:41,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:03:41,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:41,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302021655] [2023-12-02 20:03:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302021655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840639786] [2023-12-02 20:03:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:03:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:41,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:41,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:03:41,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 20:03:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:03:41,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 20:03:41,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:41,677 INFO L349 Elim1Store]: treesize reduction 28, result has 56.3 percent of original size [2023-12-02 20:03:41,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 82 [2023-12-02 20:03:41,695 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:03:41,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2023-12-02 20:03:41,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2023-12-02 20:03:41,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 20:03:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:03:41,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:03:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840639786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:41,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:03:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 19 [2023-12-02 20:03:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74952485] [2023-12-02 20:03:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 20:03:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 20:03:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:03:41,878 INFO L87 Difference]: Start difference. First operand 112 states and 151 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:42,317 INFO L93 Difference]: Finished difference Result 192 states and 279 transitions. [2023-12-02 20:03:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 20:03:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-12-02 20:03:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:42,319 INFO L225 Difference]: With dead ends: 192 [2023-12-02 20:03:42,319 INFO L226 Difference]: Without dead ends: 192 [2023-12-02 20:03:42,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-12-02 20:03:42,320 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 119 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:42,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 336 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:03:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-02 20:03:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 134. [2023-12-02 20:03:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 121 states have internal predecessors, (165), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-02 20:03:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2023-12-02 20:03:42,336 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 35 [2023-12-02 20:03:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:42,336 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2023-12-02 20:03:42,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2023-12-02 20:03:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 20:03:42,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:42,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:42,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 20:03:42,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:42,539 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:42,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:42,539 INFO L85 PathProgramCache]: Analyzing trace with hash 197199742, now seen corresponding path program 1 times [2023-12-02 20:03:42,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:42,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498921246] [2023-12-02 20:03:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:42,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:03:42,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498921246] [2023-12-02 20:03:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498921246] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:42,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:42,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:03:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106827276] [2023-12-02 20:03:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:42,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:03:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:03:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:03:42,668 INFO L87 Difference]: Start difference. First operand 134 states and 187 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:42,745 INFO L93 Difference]: Finished difference Result 150 states and 209 transitions. [2023-12-02 20:03:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:03:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-12-02 20:03:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:42,747 INFO L225 Difference]: With dead ends: 150 [2023-12-02 20:03:42,747 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 20:03:42,748 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 [2023-12-02 20:03:42,748 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:42,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 106 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 20:03:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2023-12-02 20:03:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 133 states have (on average 1.3609022556390977) internal successors, (181), 132 states have internal predecessors, (181), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-02 20:03:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 203 transitions. [2023-12-02 20:03:42,760 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 203 transitions. Word has length 37 [2023-12-02 20:03:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:42,760 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 203 transitions. [2023-12-02 20:03:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 203 transitions. [2023-12-02 20:03:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 20:03:42,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:42,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 20:03:42,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:42,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash -805206359, now seen corresponding path program 1 times [2023-12-02 20:03:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059925901] [2023-12-02 20:03:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 20:03:42,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:42,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059925901] [2023-12-02 20:03:42,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059925901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:42,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349647206] [2023-12-02 20:03:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:42,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:42,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 20:03:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:43,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:03:43,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 20:03:43,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 20:03:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349647206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165093192] [2023-12-02 20:03:43,404 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 20:03:43,405 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:43,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:43,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:43,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:43,966 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 28 for LOIs [2023-12-02 20:03:44,414 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:45,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2752#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_#valid_116| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.base_26| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_26|) (= (store |v_#valid_116| |v_ULTIMATE.start_main_~#head~1#1.base_26| 0) |#valid|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_26|) 0) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_26|) 0) 0))) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (or (exists ((|v_#memory_int_158| (Array Int (Array Int Int))) (|v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9| Int) (|v_sll_append_~temp~0#1.base_BEFORE_RETURN_9| Int) (|v_#memory_$Pointer$.offset_131| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_131| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9| (store (select |v_#memory_$Pointer$.offset_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9| 0))) (= (store |v_#memory_$Pointer$.base_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9| (store (select |v_#memory_$Pointer$.base_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9| (select (select |#memory_$Pointer$.base| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9|))) |#memory_$Pointer$.base|) (= |#memory_int| (store |v_#memory_int_158| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9| (store (select |v_#memory_int_158| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9| (select (select |#memory_int| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_9|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_9|)))))) (exists ((|v_sll_append_~temp~0#1.base_BEFORE_RETURN_10| Int) (|v_#memory_int_158| (Array Int (Array Int Int))) (|v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10| Int) (|v_#memory_$Pointer$.offset_131| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_131| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10| (store (select |v_#memory_$Pointer$.base_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10| (select (select |#memory_$Pointer$.base| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10|))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10| (store (select |v_#memory_$Pointer$.offset_131| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10| 0))) (= |#memory_int| (store |v_#memory_int_158| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10| (store (select |v_#memory_int_158| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10| (select (select |#memory_int| |v_sll_append_~temp~0#1.base_BEFORE_RETURN_10|) |v_sll_append_~temp~0#1.offset_BEFORE_RETURN_10|))))))) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:03:45,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:45,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:45,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-12-02 20:03:45,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893597179] [2023-12-02 20:03:45,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 20:03:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 20:03:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-12-02 20:03:45,913 INFO L87 Difference]: Start difference. First operand 145 states and 203 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:46,155 INFO L93 Difference]: Finished difference Result 171 states and 237 transitions. [2023-12-02 20:03:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:03:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-12-02 20:03:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:46,157 INFO L225 Difference]: With dead ends: 171 [2023-12-02 20:03:46,157 INFO L226 Difference]: Without dead ends: 168 [2023-12-02 20:03:46,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 20:03:46,159 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 62 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:46,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 310 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:03:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-12-02 20:03:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2023-12-02 20:03:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.3525179856115108) internal successors, (188), 138 states have internal predecessors, (188), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-12-02 20:03:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 210 transitions. [2023-12-02 20:03:46,170 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 210 transitions. Word has length 37 [2023-12-02 20:03:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:46,170 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 210 transitions. [2023-12-02 20:03:46,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 210 transitions. [2023-12-02 20:03:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 20:03:46,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:46,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:03:46,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 20:03:46,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:46,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:46,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -461746597, now seen corresponding path program 2 times [2023-12-02 20:03:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:46,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106624625] [2023-12-02 20:03:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 20:03:46,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106624625] [2023-12-02 20:03:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106624625] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569427835] [2023-12-02 20:03:46,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:03:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:47,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:47,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 20:03:47,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 20:03:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:03:47,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 20:03:47,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:47,338 INFO L349 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-12-02 20:03:47,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 33 [2023-12-02 20:03:47,372 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-12-02 20:03:47,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 24 [2023-12-02 20:03:47,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 20:03:47,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-02 20:03:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 20:03:47,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:03:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569427835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:47,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:03:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 14 [2023-12-02 20:03:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981257245] [2023-12-02 20:03:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:03:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:03:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 20:03:47,429 INFO L87 Difference]: Start difference. First operand 151 states and 210 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:47,865 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2023-12-02 20:03:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 20:03:47,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-12-02 20:03:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:47,867 INFO L225 Difference]: With dead ends: 211 [2023-12-02 20:03:47,867 INFO L226 Difference]: Without dead ends: 211 [2023-12-02 20:03:47,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-12-02 20:03:47,868 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 91 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 271 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:03:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-12-02 20:03:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 105. [2023-12-02 20:03:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 94 states have (on average 1.2872340425531914) internal successors, (121), 96 states have internal predecessors, (121), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 20:03:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2023-12-02 20:03:47,879 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 40 [2023-12-02 20:03:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:47,880 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2023-12-02 20:03:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2023-12-02 20:03:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 20:03:47,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:47,881 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 20:03:47,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 20:03:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 20:03:48,082 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:48,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1719657839, now seen corresponding path program 1 times [2023-12-02 20:03:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:48,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051678842] [2023-12-02 20:03:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:03:48,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051678842] [2023-12-02 20:03:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051678842] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960962690] [2023-12-02 20:03:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:48,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:48,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:48,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 20:03:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:48,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 20:03:48,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 20:03:48,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:03:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960962690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:48,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:03:48,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-12-02 20:03:48,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063893107] [2023-12-02 20:03:48,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:03:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:03:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:03:48,449 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:48,571 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2023-12-02 20:03:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:03:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-12-02 20:03:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:48,573 INFO L225 Difference]: With dead ends: 113 [2023-12-02 20:03:48,573 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 20:03:48,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-02 20:03:48,574 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:48,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 79 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:03:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 20:03:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2023-12-02 20:03:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 100 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 20:03:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2023-12-02 20:03:48,582 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 42 [2023-12-02 20:03:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:48,582 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2023-12-02 20:03:48,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2023-12-02 20:03:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 20:03:48,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:48,584 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 20:03:48,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 20:03:48,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:48,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:48,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 381737672, now seen corresponding path program 1 times [2023-12-02 20:03:48,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:48,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72173125] [2023-12-02 20:03:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:48,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:03:49,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:49,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72173125] [2023-12-02 20:03:49,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72173125] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:03:49,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:03:49,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 20:03:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395881906] [2023-12-02 20:03:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:03:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 20:03:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:49,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 20:03:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-02 20:03:49,449 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:49,973 INFO L93 Difference]: Finished difference Result 188 states and 265 transitions. [2023-12-02 20:03:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 20:03:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-12-02 20:03:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:49,975 INFO L225 Difference]: With dead ends: 188 [2023-12-02 20:03:49,975 INFO L226 Difference]: Without dead ends: 188 [2023-12-02 20:03:49,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:03:49,976 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 71 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:49,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 318 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 20:03:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-02 20:03:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2023-12-02 20:03:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 112 states have internal predecessors, (144), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 20:03:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2023-12-02 20:03:49,982 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 42 [2023-12-02 20:03:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:49,983 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 161 transitions. [2023-12-02 20:03:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:03:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 161 transitions. [2023-12-02 20:03:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 20:03:49,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:49,984 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 20:03:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 20:03:49,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:49,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1026584917, now seen corresponding path program 1 times [2023-12-02 20:03:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:49,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020340146] [2023-12-02 20:03:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:49,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 20:03:50,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020340146] [2023-12-02 20:03:50,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020340146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309920947] [2023-12-02 20:03:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:50,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:50,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:50,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:50,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 20:03:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:50,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 20:03:50,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 20:03:50,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 20:03:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309920947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:50,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948513715] [2023-12-02 20:03:50,506 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 20:03:50,506 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:50,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:50,506 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:50,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:51,387 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2023-12-02 20:03:52,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:56,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4529#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~ptr~0#1.offset| 0) (= |ULTIMATE.start_main_~ptr~0#1.base| 0) (exists ((|v_ULTIMATE.start_main_~#head~1#1.base_27| Int) (|v_#valid_136| (Array Int Int)) (|v_ULTIMATE.start_main_~#head~1#1.offset_30| Int)) (and (= (store |v_#valid_136| |v_ULTIMATE.start_main_~#head~1#1.base_27| 0) |#valid|) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#head~1#1.base_27|) |v_ULTIMATE.start_main_~#head~1#1.offset_30|)) (or (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 4) (= 5 |ULTIMATE.start_main_~max~0#1|) (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_27|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |v_ULTIMATE.start_main_~#head~1#1.offset_30| 0)) (and (<= 1 |#StackHeapBarrier|) (= 3 |ULTIMATE.start_main_~i~0#1|) (= 5 |ULTIMATE.start_main_~max~0#1|) (<= 2 |v_ULTIMATE.start_main_~#head~1#1.base_27|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |v_ULTIMATE.start_main_~#head~1#1.offset_30| 0))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#head~1#1.base_27|) |v_ULTIMATE.start_main_~#head~1#1.offset_30|) 0))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 20:03:56,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:56,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-12-02 20:03:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874071119] [2023-12-02 20:03:56,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 20:03:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 20:03:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 20:03:56,940 INFO L87 Difference]: Start difference. First operand 122 states and 161 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:03:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:57,746 INFO L93 Difference]: Finished difference Result 185 states and 231 transitions. [2023-12-02 20:03:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:03:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-12-02 20:03:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:57,748 INFO L225 Difference]: With dead ends: 185 [2023-12-02 20:03:57,748 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 20:03:57,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 20:03:57,750 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 289 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:57,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 225 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:03:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 20:03:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 127. [2023-12-02 20:03:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.3189655172413792) internal successors, (153), 117 states have internal predecessors, (153), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 20:03:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2023-12-02 20:03:57,755 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 43 [2023-12-02 20:03:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:57,755 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2023-12-02 20:03:57,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 20:03:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2023-12-02 20:03:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 20:03:57,756 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:57,756 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 20:03:57,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 20:03:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 20:03:57,957 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:03:57,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1166986868, now seen corresponding path program 1 times [2023-12-02 20:03:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573879593] [2023-12-02 20:03:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:57,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 20:03:59,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:59,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573879593] [2023-12-02 20:03:59,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573879593] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318921030] [2023-12-02 20:03:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:59,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:59,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 20:03:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:59,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-02 20:03:59,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:59,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 20:04:00,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:04:00,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-12-02 20:04:00,438 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-12-02 20:04:00,438 INFO L378 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 1 case distinctions, treesize of input 167 treesize of output 111 [2023-12-02 20:04:00,670 INFO L349 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2023-12-02 20:04:00,671 INFO L378 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 2 case distinctions, treesize of input 34 treesize of output 36 [2023-12-02 20:04:00,771 INFO L349 Elim1Store]: treesize reduction 88, result has 41.3 percent of original size [2023-12-02 20:04:00,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 239 treesize of output 180 [2023-12-02 20:04:01,873 INFO L349 Elim1Store]: treesize reduction 81, result has 79.4 percent of original size [2023-12-02 20:04:01,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1817 treesize of output 2018 [2023-12-02 20:04:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:04:02,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2023-12-02 20:04:02,613 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-02 20:04:02,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 45 [2023-12-02 20:04:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:04:02,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:04:03,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:04:03,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 1021 treesize of output 945 [2023-12-02 20:04:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318921030] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:03,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2135543462] [2023-12-02 20:04:03,493 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 20:04:03,493 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:03,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:03,494 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:03,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:04,136 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 83 for LOIs [2023-12-02 20:04:05,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:07,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5090#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_length_#res#1| |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= 0 |ULTIMATE.start_sll_length_#res#1|) (= 3 |ULTIMATE.start_main_~i~0#1|) (not (= 5 |ULTIMATE.start_main_~count~0#1|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (not (= |ULTIMATE.start_main_~count~0#1| 3)) (not (= |ULTIMATE.start_main_~count~0#1| 4)) (= 3 |ULTIMATE.start_main_~min~0#1|) (<= 2 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2023-12-02 20:04:07,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:07,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:04:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2023-12-02 20:04:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074469242] [2023-12-02 20:04:07,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:07,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 20:04:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 20:04:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2391, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 20:04:07,753 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:11,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:04:13,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 20:04:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:16,469 INFO L93 Difference]: Finished difference Result 301 states and 441 transitions. [2023-12-02 20:04:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 20:04:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-12-02 20:04:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:16,473 INFO L225 Difference]: With dead ends: 301 [2023-12-02 20:04:16,473 INFO L226 Difference]: Without dead ends: 301 [2023-12-02 20:04:16,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=346, Invalid=5056, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 20:04:16,475 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 203 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:16,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 637 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1080 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2023-12-02 20:04:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-12-02 20:04:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 170. [2023-12-02 20:04:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 153 states have (on average 1.326797385620915) internal successors, (203), 156 states have internal predecessors, (203), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 10 states have call predecessors, (34), 9 states have call successors, (34) [2023-12-02 20:04:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 246 transitions. [2023-12-02 20:04:16,489 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 246 transitions. Word has length 43 [2023-12-02 20:04:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:16,490 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 246 transitions. [2023-12-02 20:04:16,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:04:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 246 transitions. [2023-12-02 20:04:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 20:04:16,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:16,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:16,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 20:04:16,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:16,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:04:16,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1932807352, now seen corresponding path program 2 times [2023-12-02 20:04:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:16,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457246614] [2023-12-02 20:04:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 20:04:19,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457246614] [2023-12-02 20:04:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457246614] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465858928] [2023-12-02 20:04:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:04:19,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:19,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:19,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:19,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 20:04:19,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 20:04:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:04:19,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-02 20:04:19,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:19,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 20:04:19,939 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 20:04:19,939 INFO L378 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 19 treesize of output 16 [2023-12-02 20:04:20,163 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:04:20,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 20:04:20,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-12-02 20:04:20,606 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-12-02 20:04:20,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2023-12-02 20:04:20,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 20:04:20,808 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-12-02 20:04:20,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 63 [2023-12-02 20:04:20,873 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-12-02 20:04:20,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-12-02 20:04:21,301 INFO L349 Elim1Store]: treesize reduction 116, result has 56.7 percent of original size [2023-12-02 20:04:21,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 199 treesize of output 229 [2023-12-02 20:04:21,373 INFO L349 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2023-12-02 20:04:21,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2023-12-02 20:04:33,618 WARN L293 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 603 DAG size of output: 546 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 20:04:33,618 INFO L349 Elim1Store]: treesize reduction 240, result has 89.1 percent of original size [2023-12-02 20:04:33,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 1 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 230 case distinctions, treesize of input 778 treesize of output 2566 [2023-12-02 20:10:53,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 20:10:53,397 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 20:10:53,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 20:10:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355980394] [2023-12-02 20:10:53,400 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 20:10:53,400 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:10:53,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:10:53,401 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:10:53,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:10:53,405 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 20:10:53,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:10:53,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-02 20:10:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666203661] [2023-12-02 20:10:53,409 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 20:10:53,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 20:10:53,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:10:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 20:10:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2023-12-02 20:10:53,411 INFO L87 Difference]: Start difference. First operand 170 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:10:53,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2023-12-02 20:10:53,412 INFO L413 NwaCegarLoop]: 0 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, 0 SdHoareTripleChecker+Invalid, 1 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 [2023-12-02 20:10:53,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:10:53,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 20:10:53,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 20:10:53,613 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 20:10:53,616 INFO L158 Benchmark]: Toolchain (without parser) took 488537.73ms. Allocated memory was 159.4MB in the beginning and 625.0MB in the end (delta: 465.6MB). Free memory was 125.1MB in the beginning and 294.0MB in the end (delta: -168.8MB). Peak memory consumption was 300.7MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,616 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:10:53,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.37ms. Allocated memory is still 159.4MB. Free memory was 125.1MB in the beginning and 106.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,617 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.50ms. Allocated memory is still 159.4MB. Free memory was 106.7MB in the beginning and 104.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,617 INFO L158 Benchmark]: Boogie Preprocessor took 37.56ms. Allocated memory is still 159.4MB. Free memory was 104.5MB in the beginning and 102.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,618 INFO L158 Benchmark]: RCFGBuilder took 483.95ms. Allocated memory is still 159.4MB. Free memory was 102.1MB in the beginning and 78.3MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,618 INFO L158 Benchmark]: TraceAbstraction took 487564.00ms. Allocated memory was 159.4MB in the beginning and 625.0MB in the end (delta: 465.6MB). Free memory was 77.9MB in the beginning and 294.0MB in the end (delta: -216.1MB). Peak memory consumption was 252.5MB. Max. memory is 16.1GB. [2023-12-02 20:10:53,620 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.37ms. Allocated memory is still 159.4MB. Free memory was 125.1MB in the beginning and 106.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.50ms. Allocated memory is still 159.4MB. Free memory was 106.7MB in the beginning and 104.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.56ms. Allocated memory is still 159.4MB. Free memory was 104.5MB in the beginning and 102.1MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 483.95ms. Allocated memory is still 159.4MB. Free memory was 102.1MB in the beginning and 78.3MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 487564.00ms. Allocated memory was 159.4MB in the beginning and 625.0MB in the end (delta: 465.6MB). Free memory was 77.9MB in the beginning and 294.0MB in the end (delta: -216.1MB). Peak memory consumption was 252.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:10:55,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:10:55,633 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2023-12-02 20:10:55,640 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:10:55,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:10:55,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:10:55,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:10:55,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:10:55,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:10:55,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:10:55,675 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:10:55,676 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:10:55,676 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:10:55,677 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:10:55,677 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:10:55,678 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:10:55,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:10:55,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:10:55,680 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:10:55,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:10:55,682 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:10:55,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:10:55,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:10:55,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:10:55,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:10:55,684 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:10:55,685 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:10:55,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:10:55,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:10:55,686 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:10:55,686 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 20:10:55,687 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 20:10:55,687 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:10:55,687 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:10:55,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:10:55,688 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:10:55,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:10:55,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 20:10:55,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:10:55,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:10:55,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:10:55,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:10:55,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:10:55,690 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 20:10:55,690 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 20:10:55,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:10:55,691 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:10:55,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:10:55,691 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2023-12-02 20:10:55,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:10:56,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:10:56,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:10:56,008 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:10:56,008 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:10:56,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-12-02 20:10:58,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:10:59,186 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:10:59,187 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2023-12-02 20:10:59,200 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/5ef5df8a4/ea412a033ac240ab91eff95b61ec43f8/FLAG72f5f7e10 [2023-12-02 20:10:59,215 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/data/5ef5df8a4/ea412a033ac240ab91eff95b61ec43f8 [2023-12-02 20:10:59,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:10:59,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:10:59,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:10:59,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:10:59,227 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:10:59,228 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9be75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59, skipping insertion in model container [2023-12-02 20:10:59,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:10:59,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:10:59,644 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:10:59,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:10:59,728 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:10:59,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59 WrapperNode [2023-12-02 20:10:59,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:10:59,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:10:59,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:10:59,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:10:59,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,800 INFO L138 Inliner]: procedures = 130, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 186 [2023-12-02 20:10:59,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:10:59,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:10:59,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:10:59,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:10:59,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,834 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,856 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,860 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:10:59,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:10:59,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:10:59,873 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:10:59,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (1/1) ... [2023-12-02 20:10:59,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:10:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:10:59,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:10:59,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:10:59,947 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 20:10:59,948 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 20:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 20:10:59,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:10:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2023-12-02 20:10:59,949 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2023-12-02 20:10:59,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:10:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:10:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 20:10:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 20:10:59,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:10:59,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:11:00,091 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:11:00,093 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:11:00,118 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 20:11:00,444 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:11:00,485 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:11:00,486 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-02 20:11:00,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:00 BoogieIcfgContainer [2023-12-02 20:11:00,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:11:00,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:11:00,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:11:00,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:11:00,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:10:59" (1/3) ... [2023-12-02 20:11:00,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd85419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:00, skipping insertion in model container [2023-12-02 20:11:00,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:10:59" (2/3) ... [2023-12-02 20:11:00,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd85419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:11:00, skipping insertion in model container [2023-12-02 20:11:00,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:11:00" (3/3) ... [2023-12-02 20:11:00,498 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2023-12-02 20:11:00,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:11:00,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 20:11:00,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:11:00,579 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=FINITE_AUTOMATA, 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;@2d82f1e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:11:00,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 20:11:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 44 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:11:00,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:00,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:00,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:00,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1849334703, now seen corresponding path program 1 times [2023-12-02 20:11:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:00,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783149168] [2023-12-02 20:11:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:00,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:00,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:00,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:00,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 20:11:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:00,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 20:11:00,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:00,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:00,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:00,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783149168] [2023-12-02 20:11:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783149168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:00,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296075615] [2023-12-02 20:11:00,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 20:11:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 20:11:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 20:11:00,861 INFO L87 Difference]: Start difference. First operand has 49 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 44 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:00,930 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-12-02 20:11:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 20:11:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 20:11:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:00,939 INFO L225 Difference]: With dead ends: 48 [2023-12-02 20:11:00,939 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 20:11:00,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 20:11:00,944 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:00,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 20:11:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-02 20:11:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 39 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2023-12-02 20:11:00,981 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 17 [2023-12-02 20:11:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:00,982 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2023-12-02 20:11:00,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2023-12-02 20:11:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 20:11:00,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:00,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:00,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:01,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:01,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:01,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1937914531, now seen corresponding path program 1 times [2023-12-02 20:11:01,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:01,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673894442] [2023-12-02 20:11:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:01,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:01,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 20:11:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:01,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 20:11:01,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:01,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:01,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:01,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673894442] [2023-12-02 20:11:01,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673894442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:01,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:01,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:11:01,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554446451] [2023-12-02 20:11:01,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:01,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:11:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:11:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:01,382 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:01,508 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-12-02 20:11:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:11:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 20:11:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:01,511 INFO L225 Difference]: With dead ends: 50 [2023-12-02 20:11:01,511 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 20:11:01,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:11:01,513 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:01,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:11:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 20:11:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-12-02 20:11:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 40 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:11:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2023-12-02 20:11:01,523 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 17 [2023-12-02 20:11:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:01,524 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2023-12-02 20:11:01,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2023-12-02 20:11:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:11:01,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:01,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:01,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 20:11:01,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:01,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:01,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -98634229, now seen corresponding path program 1 times [2023-12-02 20:11:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820464679] [2023-12-02 20:11:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:01,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 20:11:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:01,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:01,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:01,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:01,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820464679] [2023-12-02 20:11:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820464679] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911797746] [2023-12-02 20:11:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:01,984 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:01,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:01,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-12-02 20:11:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:02,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:02,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:02,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [911797746] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711153565] [2023-12-02 20:11:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:02,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:02,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:11:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:02,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:11:02,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:02,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:11:02,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 20:11:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:02,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711153565] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:02,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 20:11:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 4, 3, 4] total 11 [2023-12-02 20:11:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757884998] [2023-12-02 20:11:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:11:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:11:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:11:02,634 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:03,291 INFO L93 Difference]: Finished difference Result 93 states and 128 transitions. [2023-12-02 20:11:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 20:11:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 20:11:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:03,295 INFO L225 Difference]: With dead ends: 93 [2023-12-02 20:11:03,295 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 20:11:03,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-02 20:11:03,297 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 84 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:03,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 278 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 20:11:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 20:11:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2023-12-02 20:11:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.4) internal successors, (70), 51 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 20:11:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2023-12-02 20:11:03,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 22 [2023-12-02 20:11:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:03,309 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2023-12-02 20:11:03,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2023-12-02 20:11:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 20:11:03,310 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:03,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:03,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 20:11:03,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 20:11:03,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:03,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:03,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:03,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -98286135, now seen corresponding path program 1 times [2023-12-02 20:11:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240848240] [2023-12-02 20:11:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:03,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:03,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:03,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 20:11:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:03,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:03,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:04,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:04,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240848240] [2023-12-02 20:11:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240848240] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:04,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911499083] [2023-12-02 20:11:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:04,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-02 20:11:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:04,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:04,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:04,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:11:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [911499083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:04,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346433126] [2023-12-02 20:11:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:04,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:04,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:04,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 20:11:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:04,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:11:04,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:04,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:04,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346433126] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:04,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 20:11:04,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 4, 3, 4] total 10 [2023-12-02 20:11:04,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236644844] [2023-12-02 20:11:04,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:04,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:11:04,534 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:04,785 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2023-12-02 20:11:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:11:04,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 20:11:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:04,788 INFO L225 Difference]: With dead ends: 68 [2023-12-02 20:11:04,788 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 20:11:04,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-02 20:11:04,789 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:04,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 190 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 20:11:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2023-12-02 20:11:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 20:11:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2023-12-02 20:11:04,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 22 [2023-12-02 20:11:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:04,800 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2023-12-02 20:11:04,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2023-12-02 20:11:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 20:11:04,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:04,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:04,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 20:11:05,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2023-12-02 20:11:05,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 20:11:05,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:05,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash 367979983, now seen corresponding path program 1 times [2023-12-02 20:11:05,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282250066] [2023-12-02 20:11:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:05,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:05,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:05,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 20:11:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:05,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:05,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:05,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:05,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:05,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282250066] [2023-12-02 20:11:05,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282250066] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:05,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1875953010] [2023-12-02 20:11:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:05,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:05,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:05,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:05,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2023-12-02 20:11:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:05,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:05,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:05,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1875953010] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:05,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410055813] [2023-12-02 20:11:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:05,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:05,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:05,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 20:11:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:05,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 20:11:05,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:11:06,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410055813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:06,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 20:11:06,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4, 3, 4] total 7 [2023-12-02 20:11:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985686626] [2023-12-02 20:11:06,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:06,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:11:06,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:11:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:06,032 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:06,203 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2023-12-02 20:11:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:11:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-12-02 20:11:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:06,206 INFO L225 Difference]: With dead ends: 99 [2023-12-02 20:11:06,206 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 20:11:06,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:11:06,207 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:06,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 105 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:11:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 20:11:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2023-12-02 20:11:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.3934426229508197) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 20:11:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2023-12-02 20:11:06,218 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 25 [2023-12-02 20:11:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:06,218 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2023-12-02 20:11:06,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2023-12-02 20:11:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 20:11:06,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:06,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:06,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 20:11:06,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 20:11:06,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2023-12-02 20:11:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:06,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:06,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1328612111, now seen corresponding path program 1 times [2023-12-02 20:11:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610763298] [2023-12-02 20:11:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:06,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:06,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 20:11:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:06,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:06,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:06,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:07,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:07,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610763298] [2023-12-02 20:11:07,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610763298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:07,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342075099] [2023-12-02 20:11:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:07,004 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:07,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:07,005 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-02 20:11:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:07,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:07,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:07,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:07,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342075099] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:07,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742195458] [2023-12-02 20:11:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:07,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:07,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:07,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 20:11:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:07,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 20:11:07,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:07,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 20:11:07,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742195458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:07,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:11:07,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3, 4, 3, 4] total 6 [2023-12-02 20:11:07,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401721862] [2023-12-02 20:11:07,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:07,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 20:11:07,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 20:11:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:11:07,456 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:11:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:07,823 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2023-12-02 20:11:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 20:11:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-12-02 20:11:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:07,825 INFO L225 Difference]: With dead ends: 100 [2023-12-02 20:11:07,825 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 20:11:07,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:11:07,827 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 40 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:07,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 247 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:11:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 20:11:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2023-12-02 20:11:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 77 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 20:11:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 118 transitions. [2023-12-02 20:11:07,839 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 118 transitions. Word has length 28 [2023-12-02 20:11:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:07,840 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 118 transitions. [2023-12-02 20:11:07,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 20:11:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 118 transitions. [2023-12-02 20:11:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 20:11:07,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:07,843 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 20:11:07,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2023-12-02 20:11:08,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 20:11:08,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 20:11:08,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:08,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:08,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1116505103, now seen corresponding path program 2 times [2023-12-02 20:11:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:08,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779709523] [2023-12-02 20:11:08,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 20:11:08,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:08,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:08,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 20:11:08,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 20:11:08,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:11:08,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 20:11:08,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:08,936 INFO L349 Elim1Store]: treesize reduction 28, result has 56.3 percent of original size [2023-12-02 20:11:08,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 82 [2023-12-02 20:11:08,966 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 20:11:08,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 52 [2023-12-02 20:11:08,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 20:11:09,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-02 20:11:09,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 20:11:09,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-02 20:11:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 20:11:09,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:09,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:09,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779709523] [2023-12-02 20:11:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779709523] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 20:11:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175959187] [2023-12-02 20:11:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 20:11:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 20:11:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:11:09,160 INFO L87 Difference]: Start difference. First operand 84 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:10,506 INFO L93 Difference]: Finished difference Result 153 states and 228 transitions. [2023-12-02 20:11:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 20:11:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-12-02 20:11:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:10,509 INFO L225 Difference]: With dead ends: 153 [2023-12-02 20:11:10,509 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 20:11:10,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-02 20:11:10,510 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:10,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 514 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 20:11:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 20:11:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 79. [2023-12-02 20:11:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 72 states have internal predecessors, (94), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 20:11:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2023-12-02 20:11:10,522 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 38 [2023-12-02 20:11:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:10,522 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2023-12-02 20:11:10,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2023-12-02 20:11:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 20:11:10,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:10,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:10,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 20:11:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:10,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:10,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1278626420, now seen corresponding path program 1 times [2023-12-02 20:11:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570994051] [2023-12-02 20:11:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:10,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:10,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:10,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:10,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 20:11:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:10,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:11:10,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:10,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:11,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570994051] [2023-12-02 20:11:11,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570994051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844247189] [2023-12-02 20:11:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:11,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:11,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:11,323 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:11,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 20:11:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:11,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:11:11,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:11,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:11,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844247189] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114618192] [2023-12-02 20:11:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:11,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:11,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:11,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:11,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 20:11:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:11,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:11:11,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:12,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:11:12,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114618192] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:12,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:11:12,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 19 [2023-12-02 20:11:12,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492061649] [2023-12-02 20:11:12,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:12,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 20:11:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 20:11:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:11:12,559 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:11:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:13,477 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-12-02 20:11:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 20:11:13,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2023-12-02 20:11:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:13,480 INFO L225 Difference]: With dead ends: 96 [2023-12-02 20:11:13,480 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 20:11:13,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-12-02 20:11:13,481 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 108 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:13,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 469 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 20:11:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 20:11:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2023-12-02 20:11:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 75 states have internal predecessors, (98), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 20:11:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2023-12-02 20:11:13,490 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 40 [2023-12-02 20:11:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:13,491 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2023-12-02 20:11:13,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:11:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2023-12-02 20:11:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 20:11:13,493 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:13,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:13,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 20:11:13,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:13,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 20:11:14,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:14,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:14,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1138301330, now seen corresponding path program 2 times [2023-12-02 20:11:14,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:14,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260027264] [2023-12-02 20:11:14,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 20:11:14,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:14,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:14,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:14,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 20:11:14,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 20:11:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:11:14,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 20:11:14,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:14,515 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2023-12-02 20:11:14,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 44 [2023-12-02 20:11:14,553 INFO L349 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-12-02 20:11:14,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-12-02 20:11:14,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:11:14,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2023-12-02 20:11:14,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2023-12-02 20:11:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 20:11:14,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:14,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260027264] [2023-12-02 20:11:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260027264] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:14,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 20:11:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034437969] [2023-12-02 20:11:14,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 20:11:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 20:11:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:11:14,798 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:16,061 INFO L93 Difference]: Finished difference Result 144 states and 214 transitions. [2023-12-02 20:11:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:11:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-12-02 20:11:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:16,063 INFO L225 Difference]: With dead ends: 144 [2023-12-02 20:11:16,063 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 20:11:16,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-12-02 20:11:16,064 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 92 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:16,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 513 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 20:11:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 20:11:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 75. [2023-12-02 20:11:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 69 states have internal predecessors, (90), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 20:11:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2023-12-02 20:11:16,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 43 [2023-12-02 20:11:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:16,072 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2023-12-02 20:11:16,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2023-12-02 20:11:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 20:11:16,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:16,073 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:11:16,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:16,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:16,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:16,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:16,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1859435395, now seen corresponding path program 1 times [2023-12-02 20:11:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:16,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259121378] [2023-12-02 20:11:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:16,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:16,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 20:11:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:16,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:11:16,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:16,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:16,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259121378] [2023-12-02 20:11:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259121378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:16,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1244128713] [2023-12-02 20:11:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:16,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:16,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:16,859 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:16,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 20:11:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:17,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:11:17,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:17,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1244128713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:17,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808073761] [2023-12-02 20:11:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:17,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:17,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:17,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 20:11:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:17,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:11:17,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:17,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:18,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808073761] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:11:18,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:11:18,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 22 [2023-12-02 20:11:18,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388998382] [2023-12-02 20:11:18,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:11:18,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 20:11:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 20:11:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-12-02 20:11:18,455 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:11:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:20,366 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2023-12-02 20:11:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 20:11:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2023-12-02 20:11:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:20,368 INFO L225 Difference]: With dead ends: 94 [2023-12-02 20:11:20,368 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 20:11:20,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-12-02 20:11:20,369 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 142 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:20,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 619 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 20:11:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 20:11:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2023-12-02 20:11:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 72 states have internal predecessors, (94), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 20:11:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2023-12-02 20:11:20,373 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 44 [2023-12-02 20:11:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:20,374 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2023-12-02 20:11:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 20:11:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2023-12-02 20:11:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 20:11:20,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:20,375 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 20:11:20,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 20:11:20,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-12-02 20:11:20,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-12-02 20:11:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:20,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:20,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -521753463, now seen corresponding path program 2 times [2023-12-02 20:11:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:20,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089213207] [2023-12-02 20:11:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 20:11:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:20,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 20:11:21,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 20:11:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:11:21,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 20:11:21,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:21,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 20:11:21,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-02 20:11:21,495 INFO L349 Elim1Store]: treesize reduction 29, result has 44.2 percent of original size [2023-12-02 20:11:21,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2023-12-02 20:11:21,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 20:11:21,596 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2023-12-02 20:11:21,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-12-02 20:11:21,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 20:11:21,736 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:11:21,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-02 20:11:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 20:11:21,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:11:21,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089213207] [2023-12-02 20:11:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089213207] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:11:21,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:11:21,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 20:11:21,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463068675] [2023-12-02 20:11:21,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:11:21,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 20:11:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:11:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 20:11:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-02 20:11:21,761 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:11:23,169 INFO L93 Difference]: Finished difference Result 170 states and 258 transitions. [2023-12-02 20:11:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 20:11:23,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-12-02 20:11:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:11:23,172 INFO L225 Difference]: With dead ends: 170 [2023-12-02 20:11:23,172 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 20:11:23,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-02 20:11:23,173 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 75 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:11:23,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 672 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 20:11:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 20:11:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 110. [2023-12-02 20:11:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 100 states have (on average 1.36) internal successors, (136), 103 states have internal predecessors, (136), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-02 20:11:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 154 transitions. [2023-12-02 20:11:23,183 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 154 transitions. Word has length 47 [2023-12-02 20:11:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:11:23,184 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 154 transitions. [2023-12-02 20:11:23,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 20:11:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 154 transitions. [2023-12-02 20:11:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 20:11:23,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:11:23,186 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 20:11:23,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 20:11:23,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:23,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK] === [2023-12-02 20:11:23,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:11:23,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1097564679, now seen corresponding path program 1 times [2023-12-02 20:11:23,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:11:23,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544828563] [2023-12-02 20:11:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:23,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 20:11:23,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:11:23,388 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 20:11:23,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 20:11:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:23,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 20:11:23,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:23,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 20:11:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:11:27,180 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2023-12-02 20:11:27,180 INFO L378 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 1 case distinctions, treesize of input 173 treesize of output 106 [2023-12-02 20:11:27,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 20:11:27,484 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2023-12-02 20:11:27,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 20:11:27,589 INFO L349 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2023-12-02 20:11:27,589 INFO L378 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 156 [2023-12-02 20:11:29,679 INFO L349 Elim1Store]: treesize reduction 103, result has 77.1 percent of original size [2023-12-02 20:11:29,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 4321 treesize of output 4474 [2023-12-02 20:11:31,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2023-12-02 20:11:31,290 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 20:11:31,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 38 [2023-12-02 20:11:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:11:31,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:11:33,949 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:11:33,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 16782 treesize of output 16174 [2023-12-02 20:11:34,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:11:34,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544828563] [2023-12-02 20:11:34,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544828563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:34,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011907905] [2023-12-02 20:11:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:34,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:11:34,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:11:34,369 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:11:34,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 20:11:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:34,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 20:11:34,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:34,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 20:11:35,194 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 20:11:35,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 20:11:35,286 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 20:11:35,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 20:11:35,732 INFO L349 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-12-02 20:11:35,732 INFO L378 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 3 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 20:11:36,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-12-02 20:11:36,356 INFO L378 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 51 treesize of output 24 [2023-12-02 20:11:36,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 20:11:36,639 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2023-12-02 20:11:36,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 20:11:36,740 INFO L349 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2023-12-02 20:11:36,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 61 [2023-12-02 20:11:38,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:11:38,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-02 20:11:38,270 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:11:38,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 28 [2023-12-02 20:11:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 20:11:38,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:11:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:11:41,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16782 treesize of output 16174 [2023-12-02 20:11:41,478 INFO L349 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2023-12-02 20:11:41,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 73 [2023-12-02 20:11:41,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011907905] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:11:41,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397351724] [2023-12-02 20:11:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:11:41,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:11:41,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:11:41,764 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:11:41,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_709705f6-bfee-4ca0-b659-c0c549ff429a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 20:11:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:11:41,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 20:11:41,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:11:41,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 20:11:50,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 20:11:51,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-02 20:11:51,172 INFO L349 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2023-12-02 20:11:51,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 110 [2023-12-02 20:11:51,869 INFO L349 Elim1Store]: treesize reduction 88, result has 38.5 percent of original size [2023-12-02 20:11:51,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 172 [2023-12-02 20:11:51,992 INFO L349 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2023-12-02 20:11:51,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2023-12-02 20:12:15,447 WARN L293 SmtUtils]: Spent 19.76s on a formula simplification. DAG size of input: 821 DAG size of output: 799 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 20:12:15,447 INFO L349 Elim1Store]: treesize reduction 107, result has 95.9 percent of original size [2023-12-02 20:12:15,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 5694 treesize of output 7961