./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b 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_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:16:29,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:16:29,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:16:30,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:16:30,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:16:30,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:16:30,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:16:30,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:16:30,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:16:30,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:16:30,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:16:30,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:16:30,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:16:30,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:16:30,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:16:30,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:16:30,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:16:30,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:16:30,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:16:30,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:16:30,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:16:30,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:16:30,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:16:30,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:16:30,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:16:30,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:16:30,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:16:30,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:16:30,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:16:30,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:16:30,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:16:30,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:16:30,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:16:30,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:16:30,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:16:30,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:16:30,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:16:30,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:16:30,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:16:30,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:16:30,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:16:30,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-19 07:16:30,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:16:30,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:16:30,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:16:30,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:16:30,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:16:30,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:16:30,174 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:16:30,174 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:16:30,174 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:16:30,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:16:30,175 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:16:30,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:16:30,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:16:30,176 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:16:30,176 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:16:30,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:16:30,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:16:30,177 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:16:30,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:16:30,178 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:16:30,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:16:30,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:16:30,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:16:30,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:16:30,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:16:30,181 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 07:16:30,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:16:30,181 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:16:30,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:16:30,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:16:30,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:16:30,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:30,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:16:30,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:16:30,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:16:30,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:16:30,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:16:30,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:16:30,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:16:30,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:16:30,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 [2022-11-19 07:16:30,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:16:30,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:16:30,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:16:30,651 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:16:30,653 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:16:30,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2022-11-19 07:16:30,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/data/6ac1ad6b3/d7adfe3b1a5e490bb10dd0fd2486ddd3/FLAG7d5e9527b [2022-11-19 07:16:31,306 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:16:31,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2022-11-19 07:16:31,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/data/6ac1ad6b3/d7adfe3b1a5e490bb10dd0fd2486ddd3/FLAG7d5e9527b [2022-11-19 07:16:31,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/data/6ac1ad6b3/d7adfe3b1a5e490bb10dd0fd2486ddd3 [2022-11-19 07:16:31,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:16:31,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:16:31,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:31,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:16:31,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:16:31,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:31" (1/1) ... [2022-11-19 07:16:31,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b574c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:31, skipping insertion in model container [2022-11-19 07:16:31,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:31" (1/1) ... [2022-11-19 07:16:31,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:16:31,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:16:32,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:32,019 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:16:32,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:32,054 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:16:32,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32 WrapperNode [2022-11-19 07:16:32,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:32,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:32,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:16:32,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:16:32,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,095 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-11-19 07:16:32,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:32,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:16:32,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:16:32,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:16:32,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:16:32,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:16:32,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:16:32,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:16:32,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (1/1) ... [2022-11-19 07:16:32,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:32,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:16:32,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:16:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-11-19 07:16:32,218 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2022-11-19 07:16:32,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:16:32,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:16:32,297 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:16:32,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:16:32,486 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:16:32,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:16:32,519 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:16:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:16:32 BoogieIcfgContainer [2022-11-19 07:16:32,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:16:32,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:16:32,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:16:32,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:16:32,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:16:31" (1/3) ... [2022-11-19 07:16:32,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796d9366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:16:32, skipping insertion in model container [2022-11-19 07:16:32,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:32" (2/3) ... [2022-11-19 07:16:32,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796d9366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:16:32, skipping insertion in model container [2022-11-19 07:16:32,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:16:32" (3/3) ... [2022-11-19 07:16:32,545 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2022-11-19 07:16:32,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:16:32,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-19 07:16:32,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:16:32,637 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=LoopsAndPotentialCycles, 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;@3bedd63e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:16:32,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 07:16:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:16:32,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:16:32,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:32,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:16:32,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1970913107, now seen corresponding path program 1 times [2022-11-19 07:16:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743372244] [2022-11-19 07:16:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:33,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:33,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743372244] [2022-11-19 07:16:33,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743372244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:33,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:33,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166909210] [2022-11-19 07:16:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:33,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:16:33,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:16:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:33,135 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 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) [2022-11-19 07:16:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:33,340 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-19 07:16:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:16:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 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 [2022-11-19 07:16:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:33,356 INFO L225 Difference]: With dead ends: 40 [2022-11-19 07:16:33,356 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 07:16:33,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:33,369 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:33,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 07:16:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-11-19 07:16:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:16:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-19 07:16:33,421 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2022-11-19 07:16:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:33,421 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-19 07:16:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 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) [2022-11-19 07:16:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-19 07:16:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:16:33,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:33,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:33,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:16:33,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 968764211, now seen corresponding path program 1 times [2022-11-19 07:16:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:33,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080130661] [2022-11-19 07:16:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:33,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080130661] [2022-11-19 07:16:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080130661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:16:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148904243] [2022-11-19 07:16:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:33,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:16:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:16:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:33,492 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-11-19 07:16:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:33,570 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-19 07:16:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:16:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2022-11-19 07:16:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:33,573 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:16:33,573 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 07:16:33,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:33,575 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:33,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 07:16:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-19 07:16:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:16:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-19 07:16:33,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2022-11-19 07:16:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:33,591 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-19 07:16:33,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-11-19 07:16:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-19 07:16:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:16:33,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:33,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:33,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:16:33,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:33,595 INFO L85 PathProgramCache]: Analyzing trace with hash -405430864, now seen corresponding path program 1 times [2022-11-19 07:16:33,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:33,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716471074] [2022-11-19 07:16:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:33,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:33,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716471074] [2022-11-19 07:16:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716471074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382800771] [2022-11-19 07:16:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:33,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:33,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:33,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:33,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:16:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:16:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:33,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:33,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382800771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:33,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353927015] [2022-11-19 07:16:34,008 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:16:34,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:34,014 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:34,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:34,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-19 07:16:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632585382] [2022-11-19 07:16:34,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:16:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:16:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:16:34,024 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:34,373 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2022-11-19 07:16:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:16:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:16:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:34,376 INFO L225 Difference]: With dead ends: 95 [2022-11-19 07:16:34,377 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 07:16:34,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:16:34,380 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:34,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 94 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:16:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 07:16:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-11-19 07:16:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 58 states have internal predecessors, (74), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:16:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-11-19 07:16:34,405 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 12 [2022-11-19 07:16:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:34,406 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-11-19 07:16:34,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-11-19 07:16:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:16:34,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:34,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:34,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:16:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:34,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1222392158, now seen corresponding path program 1 times [2022-11-19 07:16:34,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:34,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334613530] [2022-11-19 07:16:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:34,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:34,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:34,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334613530] [2022-11-19 07:16:34,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334613530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:34,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:34,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:16:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124859225] [2022-11-19 07:16:34,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:34,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:34,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:34,686 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:34,726 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-11-19 07:16:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 14 [2022-11-19 07:16:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:34,732 INFO L225 Difference]: With dead ends: 76 [2022-11-19 07:16:34,734 INFO L226 Difference]: Without dead ends: 75 [2022-11-19 07:16:34,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:34,736 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:34,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:16:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-19 07:16:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-19 07:16:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 57 states have internal predecessors, (68), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 07:16:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-11-19 07:16:34,776 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 14 [2022-11-19 07:16:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:34,777 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-11-19 07:16:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-11-19 07:16:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:16:34,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:34,780 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:34,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:16:34,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash -760548722, now seen corresponding path program 1 times [2022-11-19 07:16:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:34,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647142272] [2022-11-19 07:16:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:34,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:34,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647142272] [2022-11-19 07:16:34,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647142272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:34,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:34,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:34,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948861782] [2022-11-19 07:16:34,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:34,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:16:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:34,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:16:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:34,894 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:34,969 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-11-19 07:16:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:16:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 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 15 [2022-11-19 07:16:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:34,975 INFO L225 Difference]: With dead ends: 115 [2022-11-19 07:16:34,976 INFO L226 Difference]: Without dead ends: 114 [2022-11-19 07:16:34,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:16:34,982 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:34,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-19 07:16:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 103. [2022-11-19 07:16:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 79 states have internal predecessors, (91), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-19 07:16:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-11-19 07:16:35,025 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 15 [2022-11-19 07:16:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:35,025 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-11-19 07:16:35,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-11-19 07:16:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:16:35,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:35,028 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:35,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:16:35,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash -942664753, now seen corresponding path program 1 times [2022-11-19 07:16:35,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:35,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883344706] [2022-11-19 07:16:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:35,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:35,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883344706] [2022-11-19 07:16:35,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883344706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:35,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:35,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:16:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760531825] [2022-11-19 07:16:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:16:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:16:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:35,123 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:35,282 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-11-19 07:16:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:16:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-19 07:16:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:35,284 INFO L225 Difference]: With dead ends: 136 [2022-11-19 07:16:35,285 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 07:16:35,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:16:35,286 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:35,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 63 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 07:16:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 127. [2022-11-19 07:16:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 99 states have internal predecessors, (107), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2022-11-19 07:16:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2022-11-19 07:16:35,332 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 19 [2022-11-19 07:16:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:35,333 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2022-11-19 07:16:35,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2022-11-19 07:16:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:16:35,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:35,336 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:16:35,337 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash 842163767, now seen corresponding path program 1 times [2022-11-19 07:16:35,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:35,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247878523] [2022-11-19 07:16:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:35,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:35,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247878523] [2022-11-19 07:16:35,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247878523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:35,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:35,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:16:35,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196914730] [2022-11-19 07:16:35,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:35,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:16:35,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:35,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:16:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:35,454 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:35,619 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2022-11-19 07:16:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:16:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-19 07:16:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:35,625 INFO L225 Difference]: With dead ends: 154 [2022-11-19 07:16:35,625 INFO L226 Difference]: Without dead ends: 153 [2022-11-19 07:16:35,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:16:35,627 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:35,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 65 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-19 07:16:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 143. [2022-11-19 07:16:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 111 states have internal predecessors, (121), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 23 states have call predecessors, (37), 22 states have call successors, (37) [2022-11-19 07:16:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2022-11-19 07:16:35,697 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 20 [2022-11-19 07:16:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:35,697 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2022-11-19 07:16:35,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2022-11-19 07:16:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:16:35,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:35,699 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:35,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:16:35,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -861821652, now seen corresponding path program 2 times [2022-11-19 07:16:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:35,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907964905] [2022-11-19 07:16:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:35,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907964905] [2022-11-19 07:16:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907964905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610245348] [2022-11-19 07:16:35,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:16:35,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:35,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:35,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:16:35,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:16:35,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:35,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:16:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:36,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:36,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610245348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968429248] [2022-11-19 07:16:36,209 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-19 07:16:36,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:36,210 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:36,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:36,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-19 07:16:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813396861] [2022-11-19 07:16:36,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:16:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:16:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:16:36,215 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:16:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:36,791 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2022-11-19 07:16:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:16:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-19 07:16:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:36,797 INFO L225 Difference]: With dead ends: 214 [2022-11-19 07:16:36,797 INFO L226 Difference]: Without dead ends: 213 [2022-11-19 07:16:36,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:16:36,802 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 187 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:36,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 93 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:16:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-19 07:16:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 197. [2022-11-19 07:16:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.177304964539007) internal successors, (166), 153 states have internal predecessors, (166), 34 states have call successors, (34), 11 states have call predecessors, (34), 19 states have return successors, (52), 32 states have call predecessors, (52), 31 states have call successors, (52) [2022-11-19 07:16:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 252 transitions. [2022-11-19 07:16:36,855 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 252 transitions. Word has length 25 [2022-11-19 07:16:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:36,856 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 252 transitions. [2022-11-19 07:16:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:16:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 252 transitions. [2022-11-19 07:16:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:16:36,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:36,865 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 07:16:36,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:37,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 814681971, now seen corresponding path program 2 times [2022-11-19 07:16:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470985197] [2022-11-19 07:16:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:37,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:37,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470985197] [2022-11-19 07:16:37,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470985197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280324017] [2022-11-19 07:16:37,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:16:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:37,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:37,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:16:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:16:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:16:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:37,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:37,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280324017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:37,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804799922] [2022-11-19 07:16:37,876 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:16:37,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:37,877 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:37,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:37,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-19 07:16:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336134184] [2022-11-19 07:16:37,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:16:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:16:37,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:16:37,881 INFO L87 Difference]: Start difference. First operand 197 states and 252 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:38,594 INFO L93 Difference]: Finished difference Result 318 states and 413 transitions. [2022-11-19 07:16:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 07:16:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 07:16:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:38,598 INFO L225 Difference]: With dead ends: 318 [2022-11-19 07:16:38,598 INFO L226 Difference]: Without dead ends: 317 [2022-11-19 07:16:38,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:16:38,601 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 298 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:38,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 267 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:16:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-19 07:16:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 305. [2022-11-19 07:16:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 219 states have (on average 1.1689497716894977) internal successors, (256), 237 states have internal predecessors, (256), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2022-11-19 07:16:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 390 transitions. [2022-11-19 07:16:38,635 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 390 transitions. Word has length 27 [2022-11-19 07:16:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:38,635 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 390 transitions. [2022-11-19 07:16:38,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 390 transitions. [2022-11-19 07:16:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:16:38,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:38,637 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:38,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:38,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:38,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash -255449547, now seen corresponding path program 1 times [2022-11-19 07:16:38,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:38,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340251540] [2022-11-19 07:16:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:38,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:38,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340251540] [2022-11-19 07:16:38,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340251540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:38,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:38,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:16:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590213980] [2022-11-19 07:16:38,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:38,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:16:38,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:38,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:16:38,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:16:38,967 INFO L87 Difference]: Start difference. First operand 305 states and 390 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:39,024 INFO L93 Difference]: Finished difference Result 305 states and 390 transitions. [2022-11-19 07:16:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:16:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-19 07:16:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:39,028 INFO L225 Difference]: With dead ends: 305 [2022-11-19 07:16:39,029 INFO L226 Difference]: Without dead ends: 304 [2022-11-19 07:16:39,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:16:39,030 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:39,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:16:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-19 07:16:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-11-19 07:16:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 219 states have (on average 1.091324200913242) internal successors, (239), 236 states have internal predecessors, (239), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2022-11-19 07:16:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 373 transitions. [2022-11-19 07:16:39,065 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 373 transitions. Word has length 31 [2022-11-19 07:16:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:39,067 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 373 transitions. [2022-11-19 07:16:39,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 373 transitions. [2022-11-19 07:16:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:16:39,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:39,071 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:16:39,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 944446454, now seen corresponding path program 1 times [2022-11-19 07:16:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:39,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320415166] [2022-11-19 07:16:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:39,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320415166] [2022-11-19 07:16:39,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320415166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:39,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:39,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:16:39,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339152226] [2022-11-19 07:16:39,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:16:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:39,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:16:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:39,243 INFO L87 Difference]: Start difference. First operand 304 states and 373 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:39,391 INFO L93 Difference]: Finished difference Result 305 states and 373 transitions. [2022-11-19 07:16:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:16:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-19 07:16:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:39,394 INFO L225 Difference]: With dead ends: 305 [2022-11-19 07:16:39,395 INFO L226 Difference]: Without dead ends: 304 [2022-11-19 07:16:39,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:16:39,396 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:39,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-19 07:16:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-11-19 07:16:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 219 states have (on average 1.08675799086758) internal successors, (238), 235 states have internal predecessors, (238), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2022-11-19 07:16:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 372 transitions. [2022-11-19 07:16:39,436 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 372 transitions. Word has length 35 [2022-11-19 07:16:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:39,437 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 372 transitions. [2022-11-19 07:16:39,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 372 transitions. [2022-11-19 07:16:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:16:39,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:39,438 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:16:39,439 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -786930960, now seen corresponding path program 1 times [2022-11-19 07:16:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568555898] [2022-11-19 07:16:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:39,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:39,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:39,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568555898] [2022-11-19 07:16:39,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568555898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:39,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:39,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:16:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349353531] [2022-11-19 07:16:39,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:16:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:16:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:16:39,569 INFO L87 Difference]: Start difference. First operand 303 states and 372 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:39,726 INFO L93 Difference]: Finished difference Result 322 states and 395 transitions. [2022-11-19 07:16:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:16:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-19 07:16:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:39,733 INFO L225 Difference]: With dead ends: 322 [2022-11-19 07:16:39,733 INFO L226 Difference]: Without dead ends: 321 [2022-11-19 07:16:39,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:16:39,735 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:39,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:16:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-19 07:16:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2022-11-19 07:16:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 231 states have (on average 1.0865800865800865) internal successors, (251), 247 states have internal predecessors, (251), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2022-11-19 07:16:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 376 transitions. [2022-11-19 07:16:39,766 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 376 transitions. Word has length 36 [2022-11-19 07:16:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:39,766 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 376 transitions. [2022-11-19 07:16:39,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:16:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 376 transitions. [2022-11-19 07:16:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:16:39,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:39,771 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:16:39,771 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -637820809, now seen corresponding path program 3 times [2022-11-19 07:16:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:39,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37302425] [2022-11-19 07:16:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:16:40,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37302425] [2022-11-19 07:16:40,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37302425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246194204] [2022-11-19 07:16:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:16:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:40,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:40,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:16:40,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:16:40,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:40,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:16:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:16:40,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:40,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246194204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:40,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:16:40,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2022-11-19 07:16:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708757872] [2022-11-19 07:16:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:16:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:16:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:16:40,204 INFO L87 Difference]: Start difference. First operand 319 states and 376 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:40,302 INFO L93 Difference]: Finished difference Result 446 states and 558 transitions. [2022-11-19 07:16:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:16:40,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-19 07:16:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:40,306 INFO L225 Difference]: With dead ends: 446 [2022-11-19 07:16:40,306 INFO L226 Difference]: Without dead ends: 243 [2022-11-19 07:16:40,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:16:40,314 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:40,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:16:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-19 07:16:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2022-11-19 07:16:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 166 states have (on average 1.0783132530120483) internal successors, (179), 177 states have internal predecessors, (179), 39 states have call successors, (39), 14 states have call predecessors, (39), 23 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-19 07:16:40,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 267 transitions. [2022-11-19 07:16:40,347 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 267 transitions. Word has length 40 [2022-11-19 07:16:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:40,348 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 267 transitions. [2022-11-19 07:16:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:16:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 267 transitions. [2022-11-19 07:16:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:16:40,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:40,351 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:40,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:16:40,557 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash -171330541, now seen corresponding path program 2 times [2022-11-19 07:16:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:40,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109019603] [2022-11-19 07:16:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:40,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109019603] [2022-11-19 07:16:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109019603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224663089] [2022-11-19 07:16:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:16:40,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:40,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:40,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:16:40,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:16:40,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:16:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:40,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:41,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224663089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:41,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105580428] [2022-11-19 07:16:41,024 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:16:41,024 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:41,025 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:41,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:41,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-19 07:16:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201476577] [2022-11-19 07:16:41,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:41,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:16:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:16:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:16:41,029 INFO L87 Difference]: Start difference. First operand 229 states and 267 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:41,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:41,610 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2022-11-19 07:16:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:16:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2022-11-19 07:16:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:41,612 INFO L225 Difference]: With dead ends: 284 [2022-11-19 07:16:41,612 INFO L226 Difference]: Without dead ends: 283 [2022-11-19 07:16:41,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:16:41,614 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:41,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:16:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-19 07:16:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-11-19 07:16:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 205 states have (on average 1.078048780487805) internal successors, (221), 219 states have internal predecessors, (221), 48 states have call successors, (48), 17 states have call predecessors, (48), 29 states have return successors, (61), 46 states have call predecessors, (61), 46 states have call successors, (61) [2022-11-19 07:16:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 330 transitions. [2022-11-19 07:16:41,643 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 330 transitions. Word has length 41 [2022-11-19 07:16:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:41,643 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 330 transitions. [2022-11-19 07:16:41,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 330 transitions. [2022-11-19 07:16:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:16:41,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:41,646 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1] [2022-11-19 07:16:41,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:16:41,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:16:41,852 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 544192979, now seen corresponding path program 3 times [2022-11-19 07:16:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589256644] [2022-11-19 07:16:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:42,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589256644] [2022-11-19 07:16:42,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589256644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:42,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366997626] [2022-11-19 07:16:42,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:16:42,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:42,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:16:42,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:16:42,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:16:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:42,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:43,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366997626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:43,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603933758] [2022-11-19 07:16:43,310 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:16:43,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:43,310 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:43,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:43,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-19 07:16:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136721431] [2022-11-19 07:16:43,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 07:16:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 07:16:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:16:43,316 INFO L87 Difference]: Start difference. First operand 283 states and 330 transitions. Second operand has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:45,170 INFO L93 Difference]: Finished difference Result 502 states and 622 transitions. [2022-11-19 07:16:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-19 07:16:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-19 07:16:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:45,174 INFO L225 Difference]: With dead ends: 502 [2022-11-19 07:16:45,174 INFO L226 Difference]: Without dead ends: 501 [2022-11-19 07:16:45,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2447, Invalid=5563, Unknown=0, NotChecked=0, Total=8010 [2022-11-19 07:16:45,181 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 784 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:45,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 418 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:16:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-19 07:16:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2022-11-19 07:16:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 361 states have (on average 1.077562326869806) internal successors, (389), 387 states have internal predecessors, (389), 84 states have call successors, (84), 29 states have call predecessors, (84), 53 states have return successors, (109), 82 states have call predecessors, (109), 82 states have call successors, (109) [2022-11-19 07:16:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 582 transitions. [2022-11-19 07:16:45,220 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 582 transitions. Word has length 57 [2022-11-19 07:16:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:45,221 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 582 transitions. [2022-11-19 07:16:45,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:16:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 582 transitions. [2022-11-19 07:16:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:16:45,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:45,224 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:45,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:16:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:45,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1063975248, now seen corresponding path program 3 times [2022-11-19 07:16:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996341198] [2022-11-19 07:16:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:45,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996341198] [2022-11-19 07:16:45,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996341198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293821803] [2022-11-19 07:16:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:16:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:45,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:45,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:16:45,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:16:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:16:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:16:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:45,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:46,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293821803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:46,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451310332] [2022-11-19 07:16:46,228 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:16:46,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:46,228 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:46,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:46,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-19 07:16:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969249015] [2022-11-19 07:16:46,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:46,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:16:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:16:46,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:16:46,232 INFO L87 Difference]: Start difference. First operand 499 states and 582 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 16 states have internal predecessors, (63), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:47,890 INFO L93 Difference]: Finished difference Result 608 states and 714 transitions. [2022-11-19 07:16:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 07:16:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 16 states have internal predecessors, (63), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 56 [2022-11-19 07:16:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:47,895 INFO L225 Difference]: With dead ends: 608 [2022-11-19 07:16:47,897 INFO L226 Difference]: Without dead ends: 607 [2022-11-19 07:16:47,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1544, Invalid=4936, Unknown=0, NotChecked=0, Total=6480 [2022-11-19 07:16:47,901 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:47,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 97 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:16:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-19 07:16:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2022-11-19 07:16:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 439 states have (on average 1.0774487471526195) internal successors, (473), 471 states have internal predecessors, (473), 102 states have call successors, (102), 35 states have call predecessors, (102), 65 states have return successors, (133), 100 states have call predecessors, (133), 100 states have call successors, (133) [2022-11-19 07:16:47,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 708 transitions. [2022-11-19 07:16:47,952 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 708 transitions. Word has length 56 [2022-11-19 07:16:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:47,953 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 708 transitions. [2022-11-19 07:16:47,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 16 states have internal predecessors, (63), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 708 transitions. [2022-11-19 07:16:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:16:47,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:47,958 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 13, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:47,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:16:48,165 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 778250320, now seen corresponding path program 4 times [2022-11-19 07:16:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:48,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387554777] [2022-11-19 07:16:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:48,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:48,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387554777] [2022-11-19 07:16:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387554777] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85752695] [2022-11-19 07:16:48,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:16:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:48,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:48,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:16:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:16:48,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:49,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:16:50,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85752695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149578046] [2022-11-19 07:16:50,096 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:16:50,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:50,097 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:50,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:50,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-11-19 07:16:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400768903] [2022-11-19 07:16:50,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-19 07:16:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-19 07:16:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:16:50,102 INFO L87 Difference]: Start difference. First operand 607 states and 708 transitions. Second operand has 52 states, 51 states have (on average 2.176470588235294) internal successors, (111), 28 states have internal predecessors, (111), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:54,795 INFO L93 Difference]: Finished difference Result 824 states and 972 transitions. [2022-11-19 07:16:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-19 07:16:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.176470588235294) internal successors, (111), 28 states have internal predecessors, (111), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 86 [2022-11-19 07:16:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:54,813 INFO L225 Difference]: With dead ends: 824 [2022-11-19 07:16:54,813 INFO L226 Difference]: Without dead ends: 823 [2022-11-19 07:16:54,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7847 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6524, Invalid=20536, Unknown=0, NotChecked=0, Total=27060 [2022-11-19 07:16:54,824 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 954 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:54,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 155 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:16:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-11-19 07:16:54,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 823. [2022-11-19 07:16:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 595 states have (on average 1.0773109243697478) internal successors, (641), 639 states have internal predecessors, (641), 138 states have call successors, (138), 47 states have call predecessors, (138), 89 states have return successors, (181), 136 states have call predecessors, (181), 136 states have call successors, (181) [2022-11-19 07:16:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 960 transitions. [2022-11-19 07:16:54,889 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 960 transitions. Word has length 86 [2022-11-19 07:16:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:54,890 INFO L495 AbstractCegarLoop]: Abstraction has 823 states and 960 transitions. [2022-11-19 07:16:54,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.176470588235294) internal successors, (111), 28 states have internal predecessors, (111), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 07:16:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 960 transitions. [2022-11-19 07:16:54,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:16:54,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:54,901 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1] [2022-11-19 07:16:54,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:16:55,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:16:55,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1562891923, now seen corresponding path program 4 times [2022-11-19 07:16:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:55,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925752741] [2022-11-19 07:16:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:56,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:56,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925752741] [2022-11-19 07:16:56,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925752741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:16:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897399637] [2022-11-19 07:16:56,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:16:56,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:56,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:56,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:56,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:16:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:16:56,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:57,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:16:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:16:59,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897399637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:16:59,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952120816] [2022-11-19 07:16:59,693 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:16:59,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:16:59,693 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:16:59,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:16:59,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-11-19 07:16:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682649731] [2022-11-19 07:16:59,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:16:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-19 07:16:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-19 07:16:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-11-19 07:16:59,698 INFO L87 Difference]: Start difference. First operand 823 states and 960 transitions. Second operand has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:05,062 INFO L93 Difference]: Finished difference Result 1258 states and 1558 transitions. [2022-11-19 07:17:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-19 07:17:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-19 07:17:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:05,069 INFO L225 Difference]: With dead ends: 1258 [2022-11-19 07:17:05,070 INFO L226 Difference]: Without dead ends: 1257 [2022-11-19 07:17:05,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10631, Invalid=23779, Unknown=0, NotChecked=0, Total=34410 [2022-11-19 07:17:05,075 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2106 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 1200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1200 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2110 Valid, 770 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1200 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:17:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-19 07:17:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1255. [2022-11-19 07:17:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 907 states have (on average 1.0771775082690187) internal successors, (977), 975 states have internal predecessors, (977), 210 states have call successors, (210), 71 states have call predecessors, (210), 137 states have return successors, (277), 208 states have call predecessors, (277), 208 states have call successors, (277) [2022-11-19 07:17:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1464 transitions. [2022-11-19 07:17:05,161 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1464 transitions. Word has length 117 [2022-11-19 07:17:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:05,162 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1464 transitions. [2022-11-19 07:17:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1464 transitions. [2022-11-19 07:17:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:17:05,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:05,170 INFO L195 NwaCegarLoop]: trace histogram [27, 25, 25, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:05,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:05,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:17:05,375 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:17:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash -620649584, now seen corresponding path program 5 times [2022-11-19 07:17:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148586093] [2022-11-19 07:17:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 328 proven. 1243 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:17:06,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:06,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148586093] [2022-11-19 07:17:06,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148586093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:06,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269274198] [2022-11-19 07:17:06,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:06,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:06,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:17:07,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-19 07:17:07,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:17:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2022-11-19 07:17:07,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:07,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269274198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:07,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:07,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [50] total 56 [2022-11-19 07:17:07,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409726376] [2022-11-19 07:17:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:17:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:17:07,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2416, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:17:07,188 INFO L87 Difference]: Start difference. First operand 1255 states and 1464 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:17:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:07,317 INFO L93 Difference]: Finished difference Result 1590 states and 1890 transitions. [2022-11-19 07:17:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:17:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 146 [2022-11-19 07:17:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:07,320 INFO L225 Difference]: With dead ends: 1590 [2022-11-19 07:17:07,320 INFO L226 Difference]: Without dead ends: 239 [2022-11-19 07:17:07,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=802, Invalid=2738, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:17:07,325 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:07,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-19 07:17:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-11-19 07:17:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2022-11-19 07:17:07,340 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 146 [2022-11-19 07:17:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:07,340 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2022-11-19 07:17:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:17:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2022-11-19 07:17:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-19 07:17:07,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:07,344 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1] [2022-11-19 07:17:07,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:07,549 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:17:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash -887410669, now seen corresponding path program 5 times [2022-11-19 07:17:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237256333] [2022-11-19 07:17:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:12,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237256333] [2022-11-19 07:17:12,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237256333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507517322] [2022-11-19 07:17:12,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:17:12,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:12,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:12,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:12,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:17:12,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-19 07:17:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 07:17:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:12,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:20,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507517322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226262919] [2022-11-19 07:17:20,637 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:17:20,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:17:20,638 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:17:20,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:17:20,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2022-11-19 07:17:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705120383] [2022-11-19 07:17:20,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:17:20,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-19 07:17:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-19 07:17:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2022-11-19 07:17:20,649 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:29,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:29,062 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2022-11-19 07:17:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 07:17:29,063 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-19 07:17:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:29,068 INFO L225 Difference]: With dead ends: 480 [2022-11-19 07:17:29,068 INFO L226 Difference]: Without dead ends: 479 [2022-11-19 07:17:29,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2022-11-19 07:17:29,078 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1474 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:29,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 27 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:17:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-19 07:17:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2022-11-19 07:17:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 382 states have (on average 1.0026178010471205) internal successors, (383), 382 states have internal predecessors, (383), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2022-11-19 07:17:29,116 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 237 [2022-11-19 07:17:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:29,117 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2022-11-19 07:17:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2022-11-19 07:17:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-11-19 07:17:29,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:29,127 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1] [2022-11-19 07:17:29,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:29,333 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:17:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 709780243, now seen corresponding path program 6 times [2022-11-19 07:17:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424601874] [2022-11-19 07:17:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:48,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424601874] [2022-11-19 07:17:48,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424601874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:48,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610474301] [2022-11-19 07:17:48,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:17:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:48,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:48,636 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:48,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:17:48,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:17:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:17:48,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-19 07:17:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:49,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:18:19,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610474301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918803279] [2022-11-19 07:18:19,678 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:18:19,678 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:19,678 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:18:19,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:18:19,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2022-11-19 07:18:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287460608] [2022-11-19 07:18:19,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-19 07:18:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-19 07:18:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2022-11-19 07:18:19,701 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:03,939 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2022-11-19 07:19:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-19 07:19:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2022-11-19 07:19:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:03,946 INFO L225 Difference]: With dead ends: 960 [2022-11-19 07:19:03,946 INFO L226 Difference]: Without dead ends: 959 [2022-11-19 07:19:03,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 61.9s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2022-11-19 07:19:03,981 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4533 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4533 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:03,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4533 Valid, 25 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 07:19:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-19 07:19:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2022-11-19 07:19:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 766 states have (on average 1.0013054830287207) internal successors, (767), 766 states have internal predecessors, (767), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2022-11-19 07:19:04,062 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2022-11-19 07:19:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:04,064 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2022-11-19 07:19:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2022-11-19 07:19:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-19 07:19:04,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:04,110 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1] [2022-11-19 07:19:04,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:04,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:04,322 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-11-19 07:19:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1072089363, now seen corresponding path program 7 times [2022-11-19 07:19:04,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:04,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337648170] [2022-11-19 07:19:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:42,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337648170] [2022-11-19 07:20:42,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337648170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582609156] [2022-11-19 07:20:42,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:20:42,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:42,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:42,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:42,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a40e51-247e-4dec-942e-b5fd1ec23645/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:20:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-19 07:20:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:44,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582609156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254863686] [2022-11-19 07:22:47,046 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-19 07:22:47,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:22:47,047 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:94) 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:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) 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:336) 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:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) 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) [2022-11-19 07:22:47,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:22:47,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2022-11-19 07:22:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207217626] [2022-11-19 07:22:47,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-19 07:22:47,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-19 07:22:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2022-11-19 07:22:47,106 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 768 states, 765 states have (on average 2.0013071895424837) internal successors, (1531), 386 states have internal predecessors, (1531), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)