./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:49:49,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:49:49,915 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:49:49,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:49:49,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:49:49,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:49:49,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:49:49,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:49:49,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:49:49,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:49:49,951 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:49:49,952 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:49:49,953 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:49:49,954 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:49:49,954 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:49:49,955 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:49:49,955 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:49:49,956 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:49:49,957 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:49:49,957 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:49:49,958 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:49:49,959 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:49:49,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:49:49,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:49:49,961 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:49:49,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:49:49,963 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:49:49,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:49:49,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:49:49,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:49:49,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:49:49,966 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:49:49,966 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:49:49,967 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:49:49,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:49:49,968 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:49:49,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:49:49,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:49:49,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:49,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:49:49,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:49:49,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:49:49,972 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:49:49,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:49:49,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:49:49,973 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:49:49,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:49:49,974 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_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f [2023-11-19 04:49:50,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:49:50,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:49:50,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:49:50,352 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:49:50,353 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:49:50,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2023-11-19 04:49:53,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:49:54,081 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:49:54,095 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2023-11-19 04:49:54,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/data/cedda7b22/72834dd9a7e744928409a3d363fb3883/FLAG0bf7d0e26 [2023-11-19 04:49:54,128 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/data/cedda7b22/72834dd9a7e744928409a3d363fb3883 [2023-11-19 04:49:54,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:49:54,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:49:54,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:54,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:49:54,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:49:54,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa96132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54, skipping insertion in model container [2023-11-19 04:49:54,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,198 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:49:54,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:54,467 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:49:54,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:54,542 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:49:54,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54 WrapperNode [2023-11-19 04:49:54,545 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:54,546 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:54,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:49:54,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:49:54,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,652 INFO L138 Inliner]: procedures = 17, calls = 172, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 185 [2023-11-19 04:49:54,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:54,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:49:54,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:49:54,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:49:54,675 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,695 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:49:54,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:49:54,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:49:54,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:49:54,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (1/1) ... [2023-11-19 04:49:54,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:54,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:54,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:49:54,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:49:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:49:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_32_0 [2023-11-19 04:49:54,873 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_32_0 [2023-11-19 04:49:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:49:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:49:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:49:54,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:49:54,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:49:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:49:54,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:49:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:49:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_52_0 [2023-11-19 04:49:54,878 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_52_0 [2023-11-19 04:49:54,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:49:55,047 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:49:55,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:49:56,491 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:49:56,536 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:49:56,537 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:49:56,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:56 BoogieIcfgContainer [2023-11-19 04:49:56,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:49:56,549 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:49:56,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:49:56,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:49:56,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:49:54" (1/3) ... [2023-11-19 04:49:56,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c383e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:56, skipping insertion in model container [2023-11-19 04:49:56,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:54" (2/3) ... [2023-11-19 04:49:56,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c383e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:56, skipping insertion in model container [2023-11-19 04:49:56,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:56" (3/3) ... [2023-11-19 04:49:56,556 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra.c [2023-11-19 04:49:56,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:49:56,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 258 error locations. [2023-11-19 04:49:56,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:49:56,659 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;@5a38fa18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:49:56,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 258 error locations. [2023-11-19 04:49:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 554 states, 279 states have (on average 1.9426523297491038) internal successors, (542), 539 states have internal predecessors, (542), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-19 04:49:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:49:56,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:56,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:49:56,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:49:56,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1887148490, now seen corresponding path program 1 times [2023-11-19 04:49:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:56,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453742909] [2023-11-19 04:49:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:57,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453742909] [2023-11-19 04:49:57,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453742909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:57,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:57,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:49:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971568003] [2023-11-19 04:49:57,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:57,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:49:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:49:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:57,958 INFO L87 Difference]: Start difference. First operand has 554 states, 279 states have (on average 1.9426523297491038) internal successors, (542), 539 states have internal predecessors, (542), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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) [2023-11-19 04:49:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:58,760 INFO L93 Difference]: Finished difference Result 1108 states and 1140 transitions. [2023-11-19 04:49:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:49:58,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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) Word has length 6 [2023-11-19 04:49:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:58,783 INFO L225 Difference]: With dead ends: 1108 [2023-11-19 04:49:58,783 INFO L226 Difference]: Without dead ends: 560 [2023-11-19 04:49:58,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:49:58,803 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 16 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:58,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2927 Invalid, 467 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:49:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-19 04:49:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 557. [2023-11-19 04:49:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 283 states have (on average 1.9222614840989398) internal successors, (544), 542 states have internal predecessors, (544), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-19 04:49:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 569 transitions. [2023-11-19 04:49:58,921 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 569 transitions. Word has length 6 [2023-11-19 04:49:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:58,922 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 569 transitions. [2023-11-19 04:49:58,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 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) [2023-11-19 04:49:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 569 transitions. [2023-11-19 04:49:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:49:58,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:58,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:49:58,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:49:58,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1627938913, now seen corresponding path program 1 times [2023-11-19 04:49:58,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:58,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029236444] [2023-11-19 04:49:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:59,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:59,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029236444] [2023-11-19 04:49:59,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029236444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:59,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:59,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:49:59,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88887702] [2023-11-19 04:49:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:59,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:49:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:49:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:59,472 INFO L87 Difference]: Start difference. First operand 557 states and 569 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2023-11-19 04:50:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:00,097 INFO L93 Difference]: Finished difference Result 560 states and 573 transitions. [2023-11-19 04:50:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:50:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) Word has length 7 [2023-11-19 04:50:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:00,103 INFO L225 Difference]: With dead ends: 560 [2023-11-19 04:50:00,103 INFO L226 Difference]: Without dead ends: 559 [2023-11-19 04:50:00,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:50:00,114 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 11 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:00,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2914 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:50:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-19 04:50:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 558. [2023-11-19 04:50:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 284 states have (on average 1.9190140845070423) internal successors, (545), 543 states have internal predecessors, (545), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-19 04:50:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 570 transitions. [2023-11-19 04:50:00,159 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 570 transitions. Word has length 7 [2023-11-19 04:50:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:00,160 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 570 transitions. [2023-11-19 04:50:00,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2023-11-19 04:50:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 570 transitions. [2023-11-19 04:50:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:50:00,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:00,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:00,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:00,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:50:00,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash 215554789, now seen corresponding path program 1 times [2023-11-19 04:50:00,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:00,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353670071] [2023-11-19 04:50:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:00,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353670071] [2023-11-19 04:50:00,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353670071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:00,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:00,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:50:00,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815544397] [2023-11-19 04:50:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:50:00,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:50:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:50:00,738 INFO L87 Difference]: Start difference. First operand 558 states and 570 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:50:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:01,696 INFO L93 Difference]: Finished difference Result 1081 states and 1103 transitions. [2023-11-19 04:50:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:50:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-19 04:50:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:01,704 INFO L225 Difference]: With dead ends: 1081 [2023-11-19 04:50:01,704 INFO L226 Difference]: Without dead ends: 1079 [2023-11-19 04:50:01,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:50:01,707 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1610 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:01,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 2322 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:50:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2023-11-19 04:50:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 756. [2023-11-19 04:50:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 472 states have (on average 1.923728813559322) internal successors, (908), 731 states have internal predecessors, (908), 19 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2023-11-19 04:50:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 951 transitions. [2023-11-19 04:50:01,775 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 951 transitions. Word has length 11 [2023-11-19 04:50:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 951 transitions. [2023-11-19 04:50:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:50:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 951 transitions. [2023-11-19 04:50:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:50:01,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:01,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:01,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:50:01,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1488251569, now seen corresponding path program 1 times [2023-11-19 04:50:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975233392] [2023-11-19 04:50:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:02,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975233392] [2023-11-19 04:50:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975233392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339341742] [2023-11-19 04:50:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:02,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:02,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:50:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:02,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 04:50:02,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:03,152 INFO L349 Elim1Store]: treesize reduction 333, result has 23.1 percent of original size [2023-11-19 04:50:03,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 344 [2023-11-19 04:50:03,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:03,276 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 689 treesize of output 669 [2023-11-19 04:50:03,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:03,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:50:03,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:50:03,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:50:03,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:50:04,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:04,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:04,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:04,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,188 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,242 INFO L349 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2023-11-19 04:50:04,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 124 treesize of output 108 [2023-11-19 04:50:04,424 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 9 treesize of output 7 [2023-11-19 04:50:04,439 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 9 treesize of output 7 [2023-11-19 04:50:04,456 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 9 treesize of output 7 [2023-11-19 04:50:04,465 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 9 treesize of output 7 [2023-11-19 04:50:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:04,561 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:04,637 INFO L349 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-11-19 04:50:04,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 122 [2023-11-19 04:50:04,650 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 9 treesize of output 7 [2023-11-19 04:50:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:05,645 INFO L349 Elim1Store]: treesize reduction 312, result has 21.8 percent of original size [2023-11-19 04:50:05,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 738 treesize of output 904 [2023-11-19 04:50:05,756 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 23 treesize of output 21 [2023-11-19 04:50:05,911 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 9 treesize of output 7 [2023-11-19 04:50:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:07,838 INFO L349 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2023-11-19 04:50:07,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 117 treesize of output 86 [2023-11-19 04:50:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:08,058 INFO L349 Elim1Store]: treesize reduction 114, result has 0.9 percent of original size [2023-11-19 04:50:08,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1995 treesize of output 1964 [2023-11-19 04:50:09,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:10,157 INFO L349 Elim1Store]: treesize reduction 216, result has 27.5 percent of original size [2023-11-19 04:50:10,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 234 treesize of output 290 [2023-11-19 04:50:10,195 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 178 treesize of output 174 [2023-11-19 04:50:10,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:50:10,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:10,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:10,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:10,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:10,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:50:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:11,706 INFO L349 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2023-11-19 04:50:11,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 379 treesize of output 426 [2023-11-19 04:50:11,743 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 258 treesize of output 256 [2023-11-19 04:50:11,924 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:11,938 INFO L349 Elim1Store]: treesize reduction 203, result has 0.5 percent of original size [2023-11-19 04:50:11,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 107 treesize of output 83 [2023-11-19 04:50:11,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 04:50:12,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:12,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 63 treesize of output 42 [2023-11-19 04:50:12,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-19 04:50:12,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 20 [2023-11-19 04:50:12,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-19 04:50:12,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-19 04:50:12,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-19 04:50:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:12,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:50:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339341742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:50:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376071158] [2023-11-19 04:50:13,074 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 04:50:13,074 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:50:13,079 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 04:50:13,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:50:13,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-11-19 04:50:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302242507] [2023-11-19 04:50:13,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:50:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:50:13,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:50:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:50:13,092 INFO L87 Difference]: Start difference. First operand 756 states and 951 transitions. Second operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:14,357 INFO L93 Difference]: Finished difference Result 759 states and 958 transitions. [2023-11-19 04:50:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:50:14,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:50:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:14,364 INFO L225 Difference]: With dead ends: 759 [2023-11-19 04:50:14,364 INFO L226 Difference]: Without dead ends: 758 [2023-11-19 04:50:14,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2023-11-19 04:50:14,372 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 52 mSDsluCounter, 5244 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 5797 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:14,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 5797 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:50:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-11-19 04:50:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 755. [2023-11-19 04:50:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 472 states have (on average 1.9216101694915255) internal successors, (907), 730 states have internal predecessors, (907), 19 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2023-11-19 04:50:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 950 transitions. [2023-11-19 04:50:14,415 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 950 transitions. Word has length 12 [2023-11-19 04:50:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:14,416 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 950 transitions. [2023-11-19 04:50:14,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 950 transitions. [2023-11-19 04:50:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:50:14,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:14,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:14,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:50:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:14,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_36_to_52_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:50:14,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 989729095, now seen corresponding path program 1 times [2023-11-19 04:50:14,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:14,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140410041] [2023-11-19 04:50:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:15,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:15,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140410041] [2023-11-19 04:50:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140410041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:15,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:50:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497754284] [2023-11-19 04:50:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:15,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:50:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:50:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:50:15,086 INFO L87 Difference]: Start difference. First operand 755 states and 950 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:50:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:16,111 INFO L93 Difference]: Finished difference Result 1078 states and 1100 transitions. [2023-11-19 04:50:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:50:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-19 04:50:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:16,118 INFO L225 Difference]: With dead ends: 1078 [2023-11-19 04:50:16,119 INFO L226 Difference]: Without dead ends: 1077 [2023-11-19 04:50:16,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:50:16,121 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1608 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:16,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 2744 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:50:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-11-19 04:50:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 755. [2023-11-19 04:50:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 472 states have (on average 1.9194915254237288) internal successors, (906), 730 states have internal predecessors, (906), 19 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2023-11-19 04:50:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 949 transitions. [2023-11-19 04:50:16,161 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 949 transitions. Word has length 13 [2023-11-19 04:50:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:16,161 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 949 transitions. [2023-11-19 04:50:16,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:50:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 949 transitions. [2023-11-19 04:50:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:50:16,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:16,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:50:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:16,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2023-11-19 04:50:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1108841658, now seen corresponding path program 1 times [2023-11-19 04:50:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932572170] [2023-11-19 04:50:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:16,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932572170] [2023-11-19 04:50:16,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932572170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:50:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159276340] [2023-11-19 04:50:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:16,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:50:16,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:16,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:50:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc820eb2-6be6-4399-9a9a-3f3501b41710/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:50:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:16,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 04:50:16,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:50:16,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 95 [2023-11-19 04:50:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:16,973 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-19 04:50:16,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 84 [2023-11-19 04:50:16,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:16,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2023-11-19 04:50:17,094 INFO L349 Elim1Store]: treesize reduction 147, result has 21.4 percent of original size [2023-11-19 04:50:17,095 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 7 case distinctions, treesize of input 49 treesize of output 95 [2023-11-19 04:50:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:17,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 50 [2023-11-19 04:50:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:17,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2023-11-19 04:50:17,331 INFO L349 Elim1Store]: treesize reduction 71, result has 13.4 percent of original size [2023-11-19 04:50:17,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2023-11-19 04:50:17,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 135 [2023-11-19 04:50:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:17,689 INFO L349 Elim1Store]: treesize reduction 146, result has 30.1 percent of original size [2023-11-19 04:50:17,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 814 treesize of output 638 [2023-11-19 04:50:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:17,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:17,922 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:18,006 INFO L224 Elim1Store]: Index analysis took 242 ms [2023-11-19 04:50:18,150 INFO L349 Elim1Store]: treesize reduction 123, result has 12.8 percent of original size [2023-11-19 04:50:18,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 263 treesize of output 424 [2023-11-19 04:50:18,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2023-11-19 04:50:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:18,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:50:18,496 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 11 treesize of output 5 [2023-11-19 04:50:19,071 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:19,076 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 61 [2023-11-19 04:50:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:19,152 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:19,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:19,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 313 [2023-11-19 04:50:23,143 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 9 treesize of output 7 [2023-11-19 04:50:25,131 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-11-19 04:50:25,132 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 159 [2023-11-19 04:50:25,396 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-11-19 04:50:25,396 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 159 [2023-11-19 04:50:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:25,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2023-11-19 04:50:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:25,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2023-11-19 04:50:25,725 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-11-19 04:50:25,725 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 159 [2023-11-19 04:50:26,013 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-11-19 04:50:26,014 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 159 [2023-11-19 04:50:26,298 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-11-19 04:50:26,300 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 159 [2023-11-19 04:50:26,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:26,814 INFO L349 Elim1Store]: treesize reduction 66, result has 22.4 percent of original size [2023-11-19 04:50:26,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 139 treesize of output 142 [2023-11-19 04:50:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:29,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:29,629 INFO L224 Elim1Store]: Index analysis took 193 ms [2023-11-19 04:50:29,784 INFO L349 Elim1Store]: treesize reduction 282, result has 6.0 percent of original size [2023-11-19 04:50:29,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 656 treesize of output 1031 [2023-11-19 04:50:29,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-11-19 04:50:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:29,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:50:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:30,495 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 270 [2023-11-19 04:50:30,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:30,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 212 [2023-11-19 04:50:30,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 900 treesize of output 776 [2023-11-19 04:50:33,354 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:50:33,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2023-11-19 04:50:33,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:33,577 INFO L349 Elim1Store]: treesize reduction 36, result has 16.3 percent of original size [2023-11-19 04:50:33,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 133 [2023-11-19 04:50:33,630 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:50:33,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2023-11-19 04:50:33,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:33,668 INFO L349 Elim1Store]: treesize reduction 36, result has 16.3 percent of original size [2023-11-19 04:50:33,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 133 [2023-11-19 04:50:33,720 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:50:33,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2023-11-19 04:50:33,762 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-19 04:50:33,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2023-11-19 04:50:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:50:33,801 INFO L349 Elim1Store]: treesize reduction 36, result has 16.3 percent of original size [2023-11-19 04:50:33,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 133 [2023-11-19 04:50:34,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:34,776 INFO L349 Elim1Store]: treesize reduction 164, result has 30.5 percent of original size [2023-11-19 04:50:34,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 1614 treesize of output 1005 [2023-11-19 04:50:34,886 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 58 treesize of output 42 [2023-11-19 04:50:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:50:34,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:50:35,044 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 15 treesize of output 11