./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-circular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-circular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX --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 6c54160550402a2cf6139371c972b70bfa4a53acf207c90f67eed3e784812b38 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:55:09,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:55:09,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:55:09,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:55:09,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:55:10,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:55:10,018 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:55:10,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:55:10,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:55:10,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:55:10,025 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:55:10,026 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:55:10,027 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:55:10,028 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:55:10,029 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:55:10,029 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:55:10,030 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:55:10,030 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:55:10,031 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:55:10,031 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:55:10,033 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:55:10,033 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:55:10,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:55:10,035 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:55:10,035 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:55:10,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:55:10,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:55:10,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:55:10,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:55:10,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:55:10,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:55:10,039 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:55:10,039 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:55:10,039 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:55:10,040 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:55:10,040 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:55:10,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:55:10,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:55:10,041 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:55:10,041 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:55:10,041 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:55:10,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:55:10,042 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:55:10,042 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:55:10,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:55:10,043 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c54160550402a2cf6139371c972b70bfa4a53acf207c90f67eed3e784812b38 [2023-11-12 00:55:10,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:55:10,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:55:10,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:55:10,378 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:55:10,378 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:55:10,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/forester-heap/sll-circular-1.i [2023-11-12 00:55:13,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:55:13,777 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:55:13,778 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i [2023-11-12 00:55:13,791 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/data/c537afaa1/8882d5b49f32435c9763c02c233a3032/FLAGb01286830 [2023-11-12 00:55:13,804 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/data/c537afaa1/8882d5b49f32435c9763c02c233a3032 [2023-11-12 00:55:13,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:55:13,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:55:13,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:55:13,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:55:13,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:55:13,817 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:55:13" (1/1) ... [2023-11-12 00:55:13,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6999ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:13, skipping insertion in model container [2023-11-12 00:55:13,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:55:13" (1/1) ... [2023-11-12 00:55:13,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:55:14,184 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22324,22337] [2023-11-12 00:55:14,191 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22430,22443] [2023-11-12 00:55:14,193 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22555,22568] [2023-11-12 00:55:14,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:55:14,208 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:55:14,247 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22324,22337] [2023-11-12 00:55:14,249 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22430,22443] [2023-11-12 00:55:14,251 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_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/sv-benchmarks/c/forester-heap/sll-circular-1.i[22555,22568] [2023-11-12 00:55:14,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:55:14,286 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:55:14,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14 WrapperNode [2023-11-12 00:55:14,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:55:14,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:55:14,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:55:14,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:55:14,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,329 INFO L138 Inliner]: procedures = 119, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2023-11-12 00:55:14,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:55:14,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:55:14,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:55:14,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:55:14,341 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,363 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:55:14,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:55:14,367 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:55:14,367 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:55:14,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (1/1) ... [2023-11-12 00:55:14,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:55:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:14,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:55:14,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:55:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:55:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:55:14,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:55:14,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:55:14,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:55:14,629 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:55:14,632 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:55:14,955 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:55:15,015 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:55:15,016 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-12 00:55:15,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:55:15 BoogieIcfgContainer [2023-11-12 00:55:15,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:55:15,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:55:15,025 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:55:15,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:55:15,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:55:13" (1/3) ... [2023-11-12 00:55:15,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61baab21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:55:15, skipping insertion in model container [2023-11-12 00:55:15,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:55:14" (2/3) ... [2023-11-12 00:55:15,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61baab21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:55:15, skipping insertion in model container [2023-11-12 00:55:15,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:55:15" (3/3) ... [2023-11-12 00:55:15,038 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-circular-1.i [2023-11-12 00:55:15,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:55:15,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-12 00:55:15,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:55:15,136 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;@7fadad52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:55:15,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 00:55:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:55:15,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:15,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:55:15,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:15,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:15,158 INFO L85 PathProgramCache]: Analyzing trace with hash 148381218, now seen corresponding path program 1 times [2023-11-12 00:55:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:15,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581064713] [2023-11-12 00:55:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:15,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581064713] [2023-11-12 00:55:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581064713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:15,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:55:15,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707842541] [2023-11-12 00:55:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:15,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:55:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:55:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:55:15,537 INFO L87 Difference]: Start difference. First operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:15,577 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2023-11-12 00:55:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:55:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:55:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:15,590 INFO L225 Difference]: With dead ends: 57 [2023-11-12 00:55:15,590 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:55:15,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:55:15,598 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:15,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:55:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:55:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 00:55:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-12 00:55:15,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2023-11-12 00:55:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:15,628 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-12 00:55:15,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-12 00:55:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:55:15,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:15,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:55:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:55:15,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:15,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash 263882099, now seen corresponding path program 1 times [2023-11-12 00:55:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625362081] [2023-11-12 00:55:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:16,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:16,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625362081] [2023-11-12 00:55:16,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625362081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:16,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:55:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880953302] [2023-11-12 00:55:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:55:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:55:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:55:16,024 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:16,104 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-12 00:55:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:55:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:55:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:16,106 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:55:16,106 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 00:55:16,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:55:16,109 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:16,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:55:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 00:55:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2023-11-12 00:55:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 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) [2023-11-12 00:55:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-12 00:55:16,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2023-11-12 00:55:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:16,119 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-12 00:55:16,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-12 00:55:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:55:16,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:16,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:16,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:55:16,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:16,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2093833755, now seen corresponding path program 1 times [2023-11-12 00:55:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525977069] [2023-11-12 00:55:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:16,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:16,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525977069] [2023-11-12 00:55:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525977069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:16,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:55:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480225026] [2023-11-12 00:55:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:55:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:55:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:55:16,232 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:16,269 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-11-12 00:55:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:55:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:55:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:16,272 INFO L225 Difference]: With dead ends: 67 [2023-11-12 00:55:16,272 INFO L226 Difference]: Without dead ends: 46 [2023-11-12 00:55:16,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:55:16,275 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:16,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:55:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-12 00:55:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2023-11-12 00:55:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-12 00:55:16,285 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 9 [2023-11-12 00:55:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:16,286 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-12 00:55:16,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-12 00:55:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:55:16,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:16,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:55:16,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:16,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1360097193, now seen corresponding path program 1 times [2023-11-12 00:55:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:16,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632123504] [2023-11-12 00:55:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:17,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632123504] [2023-11-12 00:55:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632123504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:17,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:17,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:55:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377511974] [2023-11-12 00:55:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:55:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:55:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:55:17,154 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:17,484 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-12 00:55:17,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:55:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:55:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:17,486 INFO L225 Difference]: With dead ends: 44 [2023-11-12 00:55:17,486 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:55:17,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:55:17,492 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:17,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:55:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:55:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-12 00:55:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2758620689655173) 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) [2023-11-12 00:55:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-12 00:55:17,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 11 [2023-11-12 00:55:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:17,504 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-12 00:55:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-12 00:55:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:55:17,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:17,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:17,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:55:17,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:17,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1079887144, now seen corresponding path program 1 times [2023-11-12 00:55:17,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621638324] [2023-11-12 00:55:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:17,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621638324] [2023-11-12 00:55:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621638324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:55:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412551202] [2023-11-12 00:55:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:17,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:17,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:55:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:18,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 00:55:18,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:18,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:55:18,134 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:55:18,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:55:18,142 INFO L351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-12 00:55:18,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:55:18,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:55:18,267 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 00:55:18,267 INFO L351 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 33 treesize of output 32 [2023-11-12 00:55:18,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-12 00:55:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:18,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:55:18,343 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:55:18,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-12 00:55:18,356 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:55:18,356 INFO L351 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 50 treesize of output 41 [2023-11-12 00:55:18,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-12 00:55:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412551202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:55:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062651489] [2023-11-12 00:55:18,503 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:55:18,504 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:55:18,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:55:18,513 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:55:18,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:55:24,042 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:55:27,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~state~0#1| 1) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_42| Int) (|v_#memory_$Pointer$.offset_32| (Array Int (Array Int Int))) (|v_#memory_int_46| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_35| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_46| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_int_46| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 1))) (not (= |v_ULTIMATE.start_main_~x~0#1.base_42| 0)) (exists ((|v_#memory_int_45| (Array Int (Array Int Int)))) (= |v_#memory_int_46| (store |v_#memory_int_45| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_int_45| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 1)))) (= (store |v_#memory_$Pointer$.base_35| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_$Pointer$.base_35| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4))) |#memory_$Pointer$.base|) (exists ((|v_#memory_$Pointer$.offset_31| (Array Int (Array Int Int)))) (= |v_#memory_$Pointer$.offset_32| (store |v_#memory_$Pointer$.offset_31| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_$Pointer$.offset_31| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 (select (select |v_#memory_$Pointer$.offset_32| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4))))) (exists ((|v_#memory_$Pointer$.base_34| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_34| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_$Pointer$.base_34| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 (select (select |v_#memory_$Pointer$.base_35| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4))) |v_#memory_$Pointer$.base_35|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_32| |v_ULTIMATE.start_main_~x~0#1.base_42| (store (select |v_#memory_$Pointer$.offset_32| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_42|) 4)))))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) 0) 0))' at error location [2023-11-12 00:55:27,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:55:27,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:55:27,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-12 00:55:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535508450] [2023-11-12 00:55:27,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:55:27,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:55:27,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:55:27,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2023-11-12 00:55:27,243 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:27,439 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2023-11-12 00:55:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:55:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:55:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:27,441 INFO L225 Difference]: With dead ends: 56 [2023-11-12 00:55:27,441 INFO L226 Difference]: Without dead ends: 54 [2023-11-12 00:55:27,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=57, Invalid=246, Unknown=3, NotChecked=0, Total=306 [2023-11-12 00:55:27,443 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:27,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 89 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:55:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-12 00:55:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2023-11-12 00:55:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.255813953488372) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-12 00:55:27,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2023-11-12 00:55:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:27,452 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-12 00:55:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-12 00:55:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:55:27,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:27,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:27,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:55:27,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:27,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 803507937, now seen corresponding path program 1 times [2023-11-12 00:55:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331306621] [2023-11-12 00:55:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:27,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:27,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331306621] [2023-11-12 00:55:27,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331306621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:27,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:27,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:55:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158016039] [2023-11-12 00:55:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:27,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:55:27,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:55:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:55:27,755 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:27,802 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2023-11-12 00:55:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:55:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:55:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:27,807 INFO L225 Difference]: With dead ends: 89 [2023-11-12 00:55:27,808 INFO L226 Difference]: Without dead ends: 68 [2023-11-12 00:55:27,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:55:27,813 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:27,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:55:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-12 00:55:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2023-11-12 00:55:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-11-12 00:55:27,832 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2023-11-12 00:55:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:27,833 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-11-12 00:55:27,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:55:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-11-12 00:55:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:55:27,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:27,835 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:55:27,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:27,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash -998590188, now seen corresponding path program 1 times [2023-11-12 00:55:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:27,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477130311] [2023-11-12 00:55:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:27,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:28,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477130311] [2023-11-12 00:55:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477130311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:55:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825221734] [2023-11-12 00:55:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:28,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:28,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:28,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:28,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a81b1cab-6169-4be8-8ad1-48f7c4dc2a0b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:55:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:28,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 00:55:28,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:28,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 00:55:29,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:55:29,130 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:55:29,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 00:55:29,165 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 00:55:29,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 00:55:29,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-11-12 00:55:29,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:55:29,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-12 00:55:29,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 00:55:29,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 00:55:29,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 00:55:29,625 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 00:55:29,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 66 [2023-11-12 00:55:29,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-12 00:55:29,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 00:55:30,033 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-12 00:55:30,034 INFO L351 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 202 treesize of output 123 [2023-11-12 00:55:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:55:30,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:55:30,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:55:30,460 INFO L351 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 389 treesize of output 333 [2023-11-12 00:55:30,867 INFO L322 Elim1Store]: treesize reduction 66, result has 50.7 percent of original size [2023-11-12 00:55:30,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 33321 treesize of output 32464 [2023-11-12 00:55:34,397 INFO L322 Elim1Store]: treesize reduction 76, result has 77.4 percent of original size [2023-11-12 00:55:34,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 46634 treesize of output 37992