./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91 --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 0.2.4-dev-0e0057c [2023-11-25 00:06:41,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:41,726 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-25 00:06:41,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:41,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:41,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:41,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:41,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:41,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:41,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:41,766 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:41,766 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:41,767 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:41,767 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:41,768 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:41,769 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:41,769 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:41,770 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:41,770 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:41,771 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:41,772 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:41,772 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:41,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:41,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:41,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:41,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:41,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:41,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:41,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:41,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:41,778 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:41,778 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:06:41,779 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:06:41,779 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:41,780 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:41,780 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:41,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:41,781 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:41,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:41,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:41,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:41,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:41,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:41,783 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:41,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:41,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:41,784 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:41,785 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:41,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:41,785 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_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f [2023-11-25 00:06:42,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:42,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:42,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:42,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:42,040 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:42,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2023-11-25 00:06:45,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:45,341 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:45,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2023-11-25 00:06:45,351 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/data/bcd5c05a1/a098cc8d3e384652a9549a7beccb5924/FLAGc277d0ed0 [2023-11-25 00:06:45,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/data/bcd5c05a1/a098cc8d3e384652a9549a7beccb5924 [2023-11-25 00:06:45,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:45,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:45,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:45,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:45,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:45,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db12b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45, skipping insertion in model container [2023-11-25 00:06:45,380 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,407 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:45,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:45,725 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:45,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:45,787 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:45,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45 WrapperNode [2023-11-25 00:06:45,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:45,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:45,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:45,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:45,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,854 INFO L138 Inliner]: procedures = 17, calls = 172, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 185 [2023-11-25 00:06:45,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:45,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:45,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:45,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:45,867 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,873 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,889 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,901 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:45,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:45,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:45,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:45,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (1/1) ... [2023-11-25 00:06:45,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:45,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:45,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_32_0 [2023-11-25 00:06:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_32_0 [2023-11-25 00:06:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:06:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:06:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:46,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:46,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:06:46,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:06:46,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:06:46,019 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_52_0 [2023-11-25 00:06:46,020 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_52_0 [2023-11-25 00:06:46,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:06:46,158 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:46,161 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:47,667 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:47,707 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:47,708 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:06:47,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:47 BoogieIcfgContainer [2023-11-25 00:06:47,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:47,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:47,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:47,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:47,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:45" (1/3) ... [2023-11-25 00:06:47,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1c1643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:47, skipping insertion in model container [2023-11-25 00:06:47,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:45" (2/3) ... [2023-11-25 00:06:47,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1c1643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:47, skipping insertion in model container [2023-11-25 00:06:47,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:47" (3/3) ... [2023-11-25 00:06:47,720 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra.c [2023-11-25 00:06:47,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:47,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 258 error locations. [2023-11-25 00:06:47,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:47,816 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;@53067434, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:47,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 258 error locations. [2023-11-25 00:06:47,823 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) [2023-11-25 00:06:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:06:47,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:47,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:06:47,832 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)] === [2023-11-25 00:06:47,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1858519339, now seen corresponding path program 1 times [2023-11-25 00:06:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708944082] [2023-11-25 00:06:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:48,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:48,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708944082] [2023-11-25 00:06:48,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708944082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:48,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:48,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:06:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931052023] [2023-11-25 00:06:48,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:48,918 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) [2023-11-25 00:06:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:49,742 INFO L93 Difference]: Finished difference Result 1108 states and 1140 transitions. [2023-11-25 00:06:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:49,744 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 [2023-11-25 00:06:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:49,766 INFO L225 Difference]: With dead ends: 1108 [2023-11-25 00:06:49,766 INFO L226 Difference]: Without dead ends: 560 [2023-11-25 00:06:49,778 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 [2023-11-25 00:06:49,782 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, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:49,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2927 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:06:49,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-11-25 00:06:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 557. [2023-11-25 00:06:49,854 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) [2023-11-25 00:06:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 569 transitions. [2023-11-25 00:06:49,864 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 569 transitions. Word has length 6 [2023-11-25 00:06:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:49,865 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 569 transitions. [2023-11-25 00:06:49,865 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) [2023-11-25 00:06:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 569 transitions. [2023-11-25 00:06:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:06:49,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:49,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:49,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:06:49,867 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)] === [2023-11-25 00:06:49,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1779524702, now seen corresponding path program 1 times [2023-11-25 00:06:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753990770] [2023-11-25 00:06:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:50,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:50,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753990770] [2023-11-25 00:06:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753990770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:50,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:50,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:06:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894952799] [2023-11-25 00:06:50,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:50,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:50,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:50,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:50,304 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) [2023-11-25 00:06:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:50,781 INFO L93 Difference]: Finished difference Result 560 states and 573 transitions. [2023-11-25 00:06:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:50,781 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 [2023-11-25 00:06:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:50,785 INFO L225 Difference]: With dead ends: 560 [2023-11-25 00:06:50,785 INFO L226 Difference]: Without dead ends: 559 [2023-11-25 00:06:50,786 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 [2023-11-25 00:06:50,788 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 11 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:50,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2914 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:06:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-25 00:06:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 558. [2023-11-25 00:06:50,813 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) [2023-11-25 00:06:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 570 transitions. [2023-11-25 00:06:50,817 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 570 transitions. Word has length 7 [2023-11-25 00:06:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:50,818 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 570 transitions. [2023-11-25 00:06:50,818 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) [2023-11-25 00:06:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 570 transitions. [2023-11-25 00:06:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-25 00:06:50,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:50,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:06:50,819 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)] === [2023-11-25 00:06:50,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2012506148, now seen corresponding path program 1 times [2023-11-25 00:06:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105276312] [2023-11-25 00:06:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:51,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:51,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105276312] [2023-11-25 00:06:51,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105276312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:51,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:06:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271101466] [2023-11-25 00:06:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:51,345 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) [2023-11-25 00:06:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:52,101 INFO L93 Difference]: Finished difference Result 1081 states and 1103 transitions. [2023-11-25 00:06:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:06:52,103 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 [2023-11-25 00:06:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:52,109 INFO L225 Difference]: With dead ends: 1081 [2023-11-25 00:06:52,109 INFO L226 Difference]: Without dead ends: 1079 [2023-11-25 00:06:52,110 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 [2023-11-25 00:06:52,111 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 1610 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:52,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1618 Valid, 2322 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:06:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2023-11-25 00:06:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 756. [2023-11-25 00:06:52,148 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) [2023-11-25 00:06:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 951 transitions. [2023-11-25 00:06:52,154 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 951 transitions. Word has length 11 [2023-11-25 00:06:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:52,154 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 951 transitions. [2023-11-25 00:06:52,155 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) [2023-11-25 00:06:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 951 transitions. [2023-11-25 00:06:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:06:52,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:52,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:52,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:06:52,156 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)] === [2023-11-25 00:06:52,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1617334288, now seen corresponding path program 1 times [2023-11-25 00:06:52,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:52,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302975522] [2023-11-25 00:06:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:52,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302975522] [2023-11-25 00:06:52,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302975522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:52,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088710615] [2023-11-25 00:06:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:52,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:52,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:52,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:52,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d85baa21-d2a1-4c7c-a461-0ebe41cedc47/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:06:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:52,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-25 00:06:52,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:06:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver