./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/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_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:44:05,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:44:06,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:44:06,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:44:06,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:44:06,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:44:06,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:44:06,081 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:44:06,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:44:06,082 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:44:06,083 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:44:06,083 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:44:06,084 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:44:06,085 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:44:06,085 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:44:06,085 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:44:06,086 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:44:06,087 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:44:06,087 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:44:06,088 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:44:06,088 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:44:06,089 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:44:06,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:44:06,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:44:06,091 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:44:06,091 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:44:06,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:44:06,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:44:06,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:44:06,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:44:06,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:44:06,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:44:06,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:44:06,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:44:06,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:44:06,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:44:06,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:44:06,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:44:06,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:44:06,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:44:06,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:44:06,095 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:44:06,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:44:06,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:44:06,096 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:44:06,096 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:44:06,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:44:06,096 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_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d5c55d9a4a2ded389ff7ce077afdc88fb2d2855921e5fd1e3b93fbba7e140e8 [2023-12-02 13:44:06,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:44:06,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:44:06,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:44:06,367 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:44:06,367 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:44:06,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2023-12-02 13:44:09,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:44:09,319 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:44:09,320 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2023-12-02 13:44:09,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/data/0c516935a/3014b9709ea14a40a9a6b724310e2381/FLAG8097c22b2 [2023-12-02 13:44:09,348 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/data/0c516935a/3014b9709ea14a40a9a6b724310e2381 [2023-12-02 13:44:09,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:44:09,352 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:44:09,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:44:09,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:44:09,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:44:09,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68625749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09, skipping insertion in model container [2023-12-02 13:44:09,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,407 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:44:09,680 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2023-12-02 13:44:09,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:44:09,693 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:44:09,731 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i[24275,24288] [2023-12-02 13:44:09,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:44:09,762 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:44:09,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09 WrapperNode [2023-12-02 13:44:09,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:44:09,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:44:09,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:44:09,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:44:09,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,806 INFO L138 Inliner]: procedures = 126, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-12-02 13:44:09,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:44:09,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:44:09,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:44:09,807 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:44:09,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,836 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:44:09,841 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:44:09,841 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:44:09,841 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:44:09,842 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (1/1) ... [2023-12-02 13:44:09,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:44:09,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:09,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:44:09,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:44:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 13:44:09,906 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 13:44:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:44:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:44:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:44:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:44:09,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:44:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:44:10,062 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:44:10,064 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:44:10,091 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 13:44:10,214 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:44:10,257 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:44:10,257 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 13:44:10,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:44:10 BoogieIcfgContainer [2023-12-02 13:44:10,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:44:10,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:44:10,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:44:10,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:44:10,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:44:09" (1/3) ... [2023-12-02 13:44:10,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa33055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:44:10, skipping insertion in model container [2023-12-02 13:44:10,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:44:09" (2/3) ... [2023-12-02 13:44:10,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa33055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:44:10, skipping insertion in model container [2023-12-02 13:44:10,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:44:10" (3/3) ... [2023-12-02 13:44:10,267 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2023-12-02 13:44:10,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:44:10,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:44:10,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:44:10,336 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3ca683a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:44:10,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:44:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:44:10,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:10,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:44:10,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:10,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash 110912375, now seen corresponding path program 1 times [2023-12-02 13:44:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679297517] [2023-12-02 13:44:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:10,577 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 13:44:10,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679297517] [2023-12-02 13:44:10,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679297517] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:44:10,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:44:10,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:44:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711217838] [2023-12-02 13:44:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:44:10,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:44:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:44:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:44:10,615 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:10,667 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2023-12-02 13:44:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:44:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 13:44:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:10,675 INFO L225 Difference]: With dead ends: 33 [2023-12-02 13:44:10,675 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 13:44:10,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:44:10,681 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:10,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:44:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 13:44:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-12-02 13:44:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-02 13:44:10,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2023-12-02 13:44:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:10,713 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-02 13:44:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-02 13:44:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:44:10,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:10,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:44:10,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:10,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -213104249, now seen corresponding path program 1 times [2023-12-02 13:44:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:10,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701825930] [2023-12-02 13:44:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:10,868 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 13:44:10,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701825930] [2023-12-02 13:44:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701825930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:10,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995779652] [2023-12-02 13:44:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:10,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:10,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:44:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:10,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:44:10,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:11,039 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 13:44:11,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:11,060 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 13:44:11,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995779652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:11,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879061456] [2023-12-02 13:44:11,078 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:44:11,078 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:11,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:11,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:11,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:12,099 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:12,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [879061456] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:44:12,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:12,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2023-12-02 13:44:12,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425638006] [2023-12-02 13:44:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:44:12,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:44:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:44:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:44:12,277 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:12,386 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-12-02 13:44:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:44:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 13:44:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:12,388 INFO L225 Difference]: With dead ends: 22 [2023-12-02 13:44:12,388 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 13:44:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:44:12,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:12,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:44:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 13:44:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2023-12-02 13:44:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 13:44:12,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2023-12-02 13:44:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:12,397 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 13:44:12,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 13:44:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 13:44:12,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:12,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:12,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:44:12,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:12,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:12,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1968536510, now seen corresponding path program 1 times [2023-12-02 13:44:12,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:12,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970289713] [2023-12-02 13:44:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:12,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:12,703 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 13:44:12,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970289713] [2023-12-02 13:44:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970289713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152079054] [2023-12-02 13:44:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:12,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:12,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:44:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:12,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:44:12,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:12,843 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 13:44:12,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:12,858 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 13:44:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152079054] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695472465] [2023-12-02 13:44:12,862 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 13:44:12,862 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:12,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:12,862 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:12,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:13,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:15,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [695472465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:44:15,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:15,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2023-12-02 13:44:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14465177] [2023-12-02 13:44:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:44:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:44:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:44:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2023-12-02 13:44:15,440 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:15,817 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-12-02 13:44:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:44:15,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 13:44:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:15,818 INFO L225 Difference]: With dead ends: 24 [2023-12-02 13:44:15,818 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 13:44:15,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2023-12-02 13:44:15,819 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:15,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:44:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 13:44:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2023-12-02 13:44:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-02 13:44:15,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-12-02 13:44:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:15,824 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-02 13:44:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-02 13:44:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 13:44:15,824 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:15,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:15,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 13:44:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:16,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:16,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2120497703, now seen corresponding path program 1 times [2023-12-02 13:44:16,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:16,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287583576] [2023-12-02 13:44:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:16,107 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 13:44:16,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287583576] [2023-12-02 13:44:16,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287583576] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4869270] [2023-12-02 13:44:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:16,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:16,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:16,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:44:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:16,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:44:16,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:16,227 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 13:44:16,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:16,242 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 13:44:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4869270] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827037886] [2023-12-02 13:44:16,245 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:44:16,245 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:16,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:16,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:16,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:16,816 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1827037886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:44:17,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:17,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2023-12-02 13:44:17,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011398602] [2023-12-02 13:44:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:44:17,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:44:17,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:44:17,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:44:17,179 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:17,271 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2023-12-02 13:44:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:44:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 13:44:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:17,272 INFO L225 Difference]: With dead ends: 33 [2023-12-02 13:44:17,272 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 13:44:17,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:44:17,274 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:17,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:44:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 13:44:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-12-02 13:44:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-12-02 13:44:17,281 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2023-12-02 13:44:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:17,281 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-12-02 13:44:17,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-12-02 13:44:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:44:17,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:17,282 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:17,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:44:17,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:17,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:17,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:17,486 INFO L85 PathProgramCache]: Analyzing trace with hash 893440738, now seen corresponding path program 1 times [2023-12-02 13:44:17,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:17,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393473050] [2023-12-02 13:44:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:44:17,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393473050] [2023-12-02 13:44:17,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393473050] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:17,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480756539] [2023-12-02 13:44:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:17,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:17,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:17,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:44:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:17,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:44:17,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:44:17,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:44:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480756539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906440111] [2023-12-02 13:44:17,704 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:44:17,704 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:17,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:17,705 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:17,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:18,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:19,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '561#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-12-02 13:44:19,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:44:19,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:19,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-12-02 13:44:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267834958] [2023-12-02 13:44:19,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:44:19,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:44:19,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:44:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:44:19,134 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:19,196 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-12-02 13:44:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:44:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 13:44:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:19,197 INFO L225 Difference]: With dead ends: 40 [2023-12-02 13:44:19,197 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 13:44:19,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:44:19,199 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:19,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 30 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:44:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 13:44:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 13:44:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-12-02 13:44:19,205 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2023-12-02 13:44:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:19,205 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-12-02 13:44:19,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-12-02 13:44:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:44:19,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:19,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:44:19,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:19,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:19,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -354450734, now seen corresponding path program 2 times [2023-12-02 13:44:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:19,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207709882] [2023-12-02 13:44:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:44:19,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:19,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207709882] [2023-12-02 13:44:19,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207709882] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:19,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121555546] [2023-12-02 13:44:19,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:44:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:19,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:19,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:44:19,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:44:19,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:44:19,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:44:19,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:44:19,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:44:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121555546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549799890] [2023-12-02 13:44:19,716 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:44:19,716 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:19,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:19,716 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:19,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:20,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:21,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-12-02 13:44:21,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:44:21,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:21,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-12-02 13:44:21,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782412464] [2023-12-02 13:44:21,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:44:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:44:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:44:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:44:21,261 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:21,323 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-12-02 13:44:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:44:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 13:44:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:21,324 INFO L225 Difference]: With dead ends: 34 [2023-12-02 13:44:21,324 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 13:44:21,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:44:21,326 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:21,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:44:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 13:44:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-02 13:44:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-02 13:44:21,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 19 [2023-12-02 13:44:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:21,334 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-02 13:44:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-02 13:44:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:44:21,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:21,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:21,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:44:21,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:44:21,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:21,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1662225074, now seen corresponding path program 1 times [2023-12-02 13:44:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040457450] [2023-12-02 13:44:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:44:21,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040457450] [2023-12-02 13:44:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040457450] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:21,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434667695] [2023-12-02 13:44:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:21,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:21,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:21,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:44:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:21,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:44:22,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:22,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:22,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 140 [2023-12-02 13:44:22,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:22,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 150 [2023-12-02 13:44:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:44:22,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:44:22,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434667695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:44:22,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:44:22,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-12-02 13:44:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708273112] [2023-12-02 13:44:22,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:44:22,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:44:22,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:44:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:44:22,714 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:22,848 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-12-02 13:44:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:44:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 13:44:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:22,849 INFO L225 Difference]: With dead ends: 40 [2023-12-02 13:44:22,849 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 13:44:22,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:44:22,850 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:22,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:44:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 13:44:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 13:44:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-02 13:44:22,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2023-12-02 13:44:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:22,858 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-02 13:44:22,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-02 13:44:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:44:22,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:22,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:22,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 13:44:23,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 13:44:23,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:23,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1419891539, now seen corresponding path program 1 times [2023-12-02 13:44:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:23,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959735656] [2023-12-02 13:44:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:44:23,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959735656] [2023-12-02 13:44:23,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959735656] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729055944] [2023-12-02 13:44:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:23,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:23,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:23,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:44:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:23,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 13:44:23,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:23,706 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 11 treesize of output 7 [2023-12-02 13:44:23,714 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 11 treesize of output 7 [2023-12-02 13:44:23,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:44:23,874 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 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:44:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:44:23,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:24,057 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_607 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_607) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)) (forall ((v_ArrVal_608 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_608) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))) is different from false [2023-12-02 13:44:24,092 INFO L349 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-12-02 13:44:24,093 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 64 [2023-12-02 13:44:24,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:24,108 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 88 treesize of output 83 [2023-12-02 13:44:24,117 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 54 treesize of output 50 [2023-12-02 13:44:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:44:24,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:44:24,169 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 13:44:24,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 13:44:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2023-12-02 13:44:24,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729055944] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:24,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802369519] [2023-12-02 13:44:24,186 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:44:24,186 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:24,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:24,187 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:24,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:25,271 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:25,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1176#(and (<= 1 |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-12-02 13:44:25,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:44:25,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:25,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2023-12-02 13:44:25,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766162710] [2023-12-02 13:44:25,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:44:25,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 13:44:25,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 13:44:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=571, Unknown=17, NotChecked=50, Total=756 [2023-12-02 13:44:25,875 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:26,164 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-12-02 13:44:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:44:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 13:44:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:26,165 INFO L225 Difference]: With dead ends: 45 [2023-12-02 13:44:26,166 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 13:44:26,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=697, Unknown=17, NotChecked=56, Total=930 [2023-12-02 13:44:26,167 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:26,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 54 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2023-12-02 13:44:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 13:44:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-02 13:44:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-12-02 13:44:26,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2023-12-02 13:44:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:26,175 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-12-02 13:44:26,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-12-02 13:44:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:44:26,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:26,176 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:44:26,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 13:44:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:26,377 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1768451795, now seen corresponding path program 3 times [2023-12-02 13:44:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484289057] [2023-12-02 13:44:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:44:27,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484289057] [2023-12-02 13:44:27,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484289057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449942978] [2023-12-02 13:44:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:44:27,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:27,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:27,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:44:27,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:44:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:44:27,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 13:44:27,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:27,341 INFO L349 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2023-12-02 13:44:27,341 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2023-12-02 13:44:27,361 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-12-02 13:44:27,361 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2023-12-02 13:44:27,665 INFO L349 Elim1Store]: treesize reduction 43, result has 39.4 percent of original size [2023-12-02 13:44:27,666 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 3 case distinctions, treesize of input 38 treesize of output 53 [2023-12-02 13:44:27,700 INFO L349 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2023-12-02 13:44:27,701 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 3 case distinctions, treesize of input 34 treesize of output 40 [2023-12-02 13:44:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:44:27,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:28,420 INFO L349 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2023-12-02 13:44:28,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 490 treesize of output 1 [2023-12-02 13:44:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:44:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449942978] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495211256] [2023-12-02 13:44:28,423 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:44:28,423 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:28,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:28,424 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:28,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:29,286 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:30,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1476#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2023-12-02 13:44:30,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:44:30,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:44:30,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-12-02 13:44:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515835151] [2023-12-02 13:44:30,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:44:30,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 13:44:30,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 13:44:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:44:30,251 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:31,685 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2023-12-02 13:44:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 13:44:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 13:44:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:31,686 INFO L225 Difference]: With dead ends: 76 [2023-12-02 13:44:31,686 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 13:44:31,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=604, Invalid=3686, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 13:44:31,689 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 111 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:31,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 64 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:44:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 13:44:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-12-02 13:44:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-02 13:44:31,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2023-12-02 13:44:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:31,698 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-02 13:44:31,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:44:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-02 13:44:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:44:31,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:31,699 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:44:31,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:44:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:31,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:44:31,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:31,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1397456856, now seen corresponding path program 4 times [2023-12-02 13:44:31,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:31,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431977899] [2023-12-02 13:44:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:31,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:44:33,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:33,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431977899] [2023-12-02 13:44:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431977899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:33,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247125026] [2023-12-02 13:44:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:44:33,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:33,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:33,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19f1b2c-0b04-4c00-87e7-3fb71c733c54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:44:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:44:33,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-02 13:44:33,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:33,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 13:44:33,735 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 13:44:33,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 13:44:33,803 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 13:44:33,810 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 13:44:33,892 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 13:44:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 13:44:33,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-12-02 13:44:34,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2023-12-02 13:44:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:44:34,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 26 [2023-12-02 13:44:34,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:44:34,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2023-12-02 13:44:34,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2023-12-02 13:44:34,050 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 0 case distinctions, treesize of input 23 treesize of output 29 [2023-12-02 13:44:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:44:34,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:35,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:35,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 143 treesize of output 168 [2023-12-02 13:44:35,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:35,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 113 treesize of output 138 [2023-12-02 13:44:36,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:36,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 292 treesize of output 314 [2023-12-02 13:44:36,712 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 13:44:36,744 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 13:44:36,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:36,868 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 2 case distinctions, treesize of input 27 treesize of output 13 [2023-12-02 13:44:37,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:37,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 248 treesize of output 270 [2023-12-02 13:44:37,104 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 13:44:37,125 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 13:44:37,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:44:37,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 4 [2023-12-02 13:44:37,360 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4)) (.cse12 (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| 0)) (.cse0 (= 0 |c_ULTIMATE.start_dll_create_~head~0#1.base|))) (and (or (not .cse0) (and (forall ((v_arrayElimArr_11 (Array Int Int)) (v_arrayElimArr_10 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_11)) (.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_10))) (let ((.cse1 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse1)) (not (= (select v_arrayElimArr_11 .cse2) 0)) (not (= .cse3 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (= (let ((.cse6 (+ .cse3 4))) (select (select .cse4 (select (select .cse5 .cse1) .cse6)) (+ 4 (select (select .cse4 .cse1) .cse6)))) 0) (not (= (select v_arrayElimArr_10 .cse2) 0)))))) (forall ((v_arrayElimArr_12 (Array Int Int))) (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_12))) (let ((.cse7 (select (select .cse11 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse7 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (forall ((v_arrayElimArr_9 (Array Int Int))) (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_9))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select v_arrayElimArr_9 .cse2) 0)) (= (let ((.cse10 (+ .cse7 4))) (select (select .cse8 (select (select .cse8 .cse9) .cse10)) (+ (select (select .cse11 .cse9) .cse10) 4))) 0) (not (= .cse9 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|)))))) (not (= (select v_arrayElimArr_12 .cse2) 0))))))) (not .cse12)) (or (let ((.cse20 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8))) (and (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse17 (let ((.cse21 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_8))) (store .cse21 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse21 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))) (let ((.cse18 (select (select .cse17 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_arrayElimArr_5 (Array Int Int))) (let ((.cse13 (let ((.cse19 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_5))) (store .cse19 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse19 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse14 (select (select .cse13 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse15 (select .cse13 .cse14)) (.cse16 (+ .cse18 4))) (or (= (select (select (store .cse13 .cse14 (store .cse15 .cse16 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (not (= (select v_arrayElimArr_5 .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse14)) (= (select (select .cse13 (select .cse15 .cse16)) (+ 4 (select (select .cse17 .cse14) .cse16))) 0)))))) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_8 .cse2))) (not (= .cse18 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)))))) (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse23 (let ((.cse29 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_8))) (store .cse29 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse29 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))) (let ((.cse22 (select (select .cse23 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_8 .cse2))) (not (= .cse22 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (forall ((v_arrayElimArr_5 (Array Int Int))) (let ((.cse27 (let ((.cse28 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_5))) (store .cse28 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse28 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse26 (select (select .cse27 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse24 (select .cse27 .cse26)) (.cse25 (+ .cse22 4))) (or (= (select (select .cse23 (select .cse24 .cse25)) (+ 4 (select (select .cse23 .cse26) .cse25))) 0) (= (select (select (store .cse27 .cse26 (store .cse24 .cse25 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (not (= (select v_arrayElimArr_5 .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse26))))))))))) (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse31 (let ((.cse37 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_8))) (store .cse37 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse37 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))) (let ((.cse30 (select (select .cse31 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_8 .cse2))) (not (= .cse30 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (forall ((v_arrayElimArr_5 (Array Int Int))) (let ((.cse35 (let ((.cse36 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_5))) (store .cse36 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse36 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse32 (select (select .cse35 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse33 (select .cse31 .cse32)) (.cse34 (+ .cse30 4))) (or (= (select (select (store .cse31 .cse32 (store .cse33 .cse34 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (not (= (select v_arrayElimArr_5 .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse32)) (= (select (select .cse35 (select (select .cse35 .cse32) .cse34)) (+ 4 (select .cse33 .cse34))) 0)))))))))) (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse39 (let ((.cse45 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_8))) (store .cse45 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse45 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))) (let ((.cse38 (select (select .cse39 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_8 .cse2))) (not (= .cse38 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (forall ((v_arrayElimArr_5 (Array Int Int))) (let ((.cse43 (let ((.cse44 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_5))) (store .cse44 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse44 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse20 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (let ((.cse40 (select (select .cse43 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse41 (select .cse39 .cse40)) (.cse42 (+ .cse38 4))) (or (= (select (select (store .cse39 .cse40 (store .cse41 .cse42 0)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (= (select (select .cse39 (select (select .cse43 .cse40) .cse42)) (+ 4 (select .cse41 .cse42))) 0) (not (= (select v_arrayElimArr_5 .cse2) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_create_~new_head~0#1.base| .cse40))))))))))))) (and .cse12 .cse0)))) is different from false [2023-12-02 13:44:38,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:38,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 111 treesize of output 131 [2023-12-02 13:44:38,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:44:38,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 101 [2023-12-02 13:44:38,427 INFO L349 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-12-02 13:44:38,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 102 [2023-12-02 13:44:38,466 INFO L349 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-12-02 13:44:38,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 93 [2023-12-02 13:44:38,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 13:44:38,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 13:50:00,614 WARN L293 SmtUtils]: Spent 5.26m on a formula simplification. DAG size of input: 3554 DAG size of output: 1862 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:50:00,615 INFO L349 Elim1Store]: treesize reduction 6293, result has 44.8 percent of original size [2023-12-02 13:50:00,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 42 select indices, 42 select index equivalence classes, 0 disjoint index pairs (out of 861 index pairs), introduced 57 new quantified variables, introduced 861 case distinctions, treesize of input 5768646 treesize of output 5614202 [2023-12-02 13:52:30,546 WARN L293 SmtUtils]: Spent 2.50m on a formula simplification. DAG size of input: 14919 DAG size of output: 5920 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:52:45,758 WARN L293 SmtUtils]: Spent 15.09s on a formula simplification that was a NOOP. DAG size: 5863 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:52:55,291 WARN L293 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 160 DAG size of output: 135 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:52:55,292 INFO L349 Elim1Store]: treesize reduction 278, result has 74.0 percent of original size [2023-12-02 13:52:55,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 332597 treesize of output 294903 [2023-12-02 13:53:56,381 WARN L293 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 6076 DAG size of output: 6046 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:54:14,432 WARN L293 SmtUtils]: Spent 18.02s on a formula simplification that was a NOOP. DAG size: 6043 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:54:16,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:54:16,988 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 318803 treesize of output 312731 [2023-12-02 13:55:44,856 WARN L293 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 6117 DAG size of output: 6177 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:55:57,065 WARN L293 SmtUtils]: Spent 9.54s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:55:57,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:55:57,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 301882 treesize of output 300542 [2023-12-02 13:56:20,404 WARN L293 SmtUtils]: Spent 23.32s on a formula simplification that was a NOOP. DAG size: 6264 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:56:42,280 WARN L293 SmtUtils]: Spent 21.83s on a formula simplification that was a NOOP. DAG size: 6258 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:56:46,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:56:46,194 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 299894 treesize of output 299746 [2023-12-02 13:57:07,715 WARN L293 SmtUtils]: Spent 21.51s on a formula simplification that was a NOOP. DAG size: 6260 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:57:19,328 WARN L293 SmtUtils]: Spent 7.69s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:57:19,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:57:19,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 306628 treesize of output 303417 [2023-12-02 13:58:06,522 WARN L293 SmtUtils]: Spent 47.16s on a formula simplification. DAG size of input: 6405 DAG size of output: 6382 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:58:28,670 WARN L293 SmtUtils]: Spent 22.11s on a formula simplification that was a NOOP. DAG size: 6379 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 13:58:34,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:58:34,026 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 302582 treesize of output 302152 [2023-12-02 13:59:04,002 WARN L293 SmtUtils]: Spent 29.95s on a formula simplification. DAG size of input: 6446 DAG size of output: 6439 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)