./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0 --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 32bit --witnessprinter.graph.data.programhash 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 --- 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-e04fb08 [2022-11-16 20:11:48,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:11:48,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:11:48,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:11:48,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:11:48,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:11:48,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:11:48,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:11:48,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:11:48,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:11:48,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:11:48,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:11:48,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:11:48,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:11:48,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:11:48,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:11:48,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:11:48,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:11:48,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:11:48,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:11:48,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:11:48,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:11:48,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:11:48,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:11:48,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:11:48,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:11:48,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:11:48,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:11:48,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:11:48,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:11:48,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:11:48,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:11:48,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:11:48,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:11:48,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:11:48,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:11:48,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:11:48,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:11:48,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:11:48,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:11:48,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:11:48,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-16 20:11:48,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:11:48,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:11:48,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:11:48,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:11:48,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:11:48,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:11:48,169 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:11:48,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:11:48,169 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:11:48,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:11:48,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:11:48,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:11:48,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:11:48,171 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:11:48,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:11:48,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:11:48,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:11:48,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:11:48,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:11:48,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:11:48,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 20:11:48,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:11:48,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:11:48,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:11:48,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:11:48,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:11:48,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:11:48,176 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 20:11:48,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:11:48,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:11:48,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:11:48,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:11:48,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:11:48,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:11:48,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:11:48,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:11:48,178 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:11:48,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:11:48,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:11:48,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:11:48,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:11:48,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:11:48,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:11:48,180 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_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24cc882af4ec42ba94c424c5a1ed92d402543c0fe2bf17d3fca0ca1cd73500b7 [2022-11-16 20:11:48,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:11:48,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:11:48,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:11:48,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:11:48,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:11:48,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2022-11-16 20:11:48,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/data/f974d5545/ab1c38b0625c46a0a54cbab025ca83c4/FLAGcfd0336e4 [2022-11-16 20:11:48,959 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:11:48,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2022-11-16 20:11:48,964 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/data/f974d5545/ab1c38b0625c46a0a54cbab025ca83c4/FLAGcfd0336e4 [2022-11-16 20:11:49,347 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/data/f974d5545/ab1c38b0625c46a0a54cbab025ca83c4 [2022-11-16 20:11:49,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:11:49,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:11:49,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:11:49,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:11:49,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:11:49,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b45eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49, skipping insertion in model container [2022-11-16 20:11:49,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:11:49,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:11:49,581 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-11-16 20:11:49,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:11:49,590 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:11:49,604 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-11-16 20:11:49,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:11:49,623 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:11:49,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49 WrapperNode [2022-11-16 20:11:49,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:11:49,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:11:49,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:11:49,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:11:49,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,669 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-16 20:11:49,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:11:49,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:11:49,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:11:49,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:11:49,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:11:49,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:11:49,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:11:49,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:11:49,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (1/1) ... [2022-11-16 20:11:49,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:11:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:49,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:11:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:11:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:11:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:11:49,773 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-16 20:11:49,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-16 20:11:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-16 20:11:49,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-16 20:11:49,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:11:49,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:11:49,851 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:11:49,855 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:11:50,032 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:11:50,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:11:50,075 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 20:11:50,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:11:50 BoogieIcfgContainer [2022-11-16 20:11:50,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:11:50,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:11:50,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:11:50,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:11:50,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:11:49" (1/3) ... [2022-11-16 20:11:50,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5d9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:11:50, skipping insertion in model container [2022-11-16 20:11:50,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:11:49" (2/3) ... [2022-11-16 20:11:50,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5d9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:11:50, skipping insertion in model container [2022-11-16 20:11:50,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:11:50" (3/3) ... [2022-11-16 20:11:50,087 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2022-11-16 20:11:50,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:11:50,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-16 20:11:50,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:11:50,158 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;@406fd78f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:11:50,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-16 20:11:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:11:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:11:50,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:50,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 20:11:50,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1023451622, now seen corresponding path program 1 times [2022-11-16 20:11:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:50,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054579228] [2022-11-16 20:11:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:50,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:50,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054579228] [2022-11-16 20:11:50,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054579228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:50,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:50,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:11:50,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753760546] [2022-11-16 20:11:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:50,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:50,507 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 3 states have (on average 1.6666666666666667) 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) [2022-11-16 20:11:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:50,650 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-16 20:11:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:11:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) 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 [2022-11-16 20:11:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:50,663 INFO L225 Difference]: With dead ends: 69 [2022-11-16 20:11:50,667 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 20:11:50,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:11:50,677 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:50,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 20:11:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-11-16 20:11:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 47 states have internal predecessors, (55), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 20:11:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-11-16 20:11:50,736 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 6 [2022-11-16 20:11:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:50,737 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-11-16 20:11:50,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) 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) [2022-11-16 20:11:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-11-16 20:11:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:11:50,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:50,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:11:50,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1662229125, now seen corresponding path program 1 times [2022-11-16 20:11:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540072082] [2022-11-16 20:11:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:50,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:50,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540072082] [2022-11-16 20:11:50,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540072082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:50,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:50,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:11:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305145106] [2022-11-16 20:11:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:11:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:11:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:11:50,817 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-11-16 20:11:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:50,851 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-16 20:11:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:11:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2022-11-16 20:11:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:50,853 INFO L225 Difference]: With dead ends: 59 [2022-11-16 20:11:50,854 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 20:11:50,854 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 [2022-11-16 20:11:50,856 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:50,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 20:11:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-11-16 20:11:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 20:11:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-16 20:11:50,868 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-11-16 20:11:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:50,868 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-16 20:11:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-11-16 20:11:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-16 20:11:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:11:50,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:50,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:11:50,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash -942893292, now seen corresponding path program 1 times [2022-11-16 20:11:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337186323] [2022-11-16 20:11:50,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:51,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:51,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337186323] [2022-11-16 20:11:51,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337186323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:51,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:51,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:11:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666390737] [2022-11-16 20:11:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:51,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:11:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:11:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:11:51,041 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:51,220 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-16 20:11:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:11:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 20:11:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:51,222 INFO L225 Difference]: With dead ends: 55 [2022-11-16 20:11:51,222 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 20:11:51,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:11:51,224 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:51,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 20:11:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-16 20:11:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 41 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 20:11:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-16 20:11:51,235 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 12 [2022-11-16 20:11:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:51,243 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-16 20:11:51,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-16 20:11:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 20:11:51,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:51,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:51,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:11:51,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:51,246 INFO L85 PathProgramCache]: Analyzing trace with hash 835079079, now seen corresponding path program 1 times [2022-11-16 20:11:51,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:51,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740170887] [2022-11-16 20:11:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:51,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:51,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740170887] [2022-11-16 20:11:51,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740170887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:51,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:51,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:11:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281659173] [2022-11-16 20:11:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:51,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:11:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:11:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:11:51,314 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:51,335 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-11-16 20:11:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:11:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 20:11:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:51,337 INFO L225 Difference]: With dead ends: 53 [2022-11-16 20:11:51,337 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 20:11:51,338 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 [2022-11-16 20:11:51,339 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:51,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 20:11:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-11-16 20:11:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 20:11:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-16 20:11:51,350 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2022-11-16 20:11:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:51,350 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-16 20:11:51,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:11:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-16 20:11:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 20:11:51,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:51,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:51,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:11:51,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash 21328462, now seen corresponding path program 1 times [2022-11-16 20:11:51,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113806290] [2022-11-16 20:11:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:51,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:51,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113806290] [2022-11-16 20:11:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113806290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:51,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:51,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53145558] [2022-11-16 20:11:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:51,528 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:51,574 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-11-16 20:11:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-16 20:11:51,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:51,577 INFO L225 Difference]: With dead ends: 75 [2022-11-16 20:11:51,577 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 20:11:51,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:51,579 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:51,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 20:11:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-11-16 20:11:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-16 20:11:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-11-16 20:11:51,600 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2022-11-16 20:11:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:51,601 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-11-16 20:11:51,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-11-16 20:11:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 20:11:51,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:51,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:51,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:11:51,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 672130067, now seen corresponding path program 1 times [2022-11-16 20:11:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:51,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238409122] [2022-11-16 20:11:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:11:51,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:51,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238409122] [2022-11-16 20:11:51,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238409122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559666539] [2022-11-16 20:11:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:51,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:51,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:11:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:11:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:51,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:11:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559666539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:51,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:11:51,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 20:11:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115944613] [2022-11-16 20:11:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:11:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:11:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:11:51,928 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:52,108 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-11-16 20:11:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:11:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-16 20:11:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:52,109 INFO L225 Difference]: With dead ends: 110 [2022-11-16 20:11:52,109 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 20:11:52,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:11:52,112 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:52,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 110 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 20:11:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-16 20:11:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 20:11:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-16 20:11:52,127 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2022-11-16 20:11:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:52,127 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-16 20:11:52,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-16 20:11:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:11:52,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:52,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:52,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 20:11:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:52,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1599491552, now seen corresponding path program 1 times [2022-11-16 20:11:52,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:52,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731249919] [2022-11-16 20:11:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:52,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:11:52,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731249919] [2022-11-16 20:11:52,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731249919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:52,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472724498] [2022-11-16 20:11:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:52,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:52,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:52,478 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:52,567 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-16 20:11:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-16 20:11:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:52,571 INFO L225 Difference]: With dead ends: 84 [2022-11-16 20:11:52,571 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 20:11:52,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:52,573 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:52,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 20:11:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-11-16 20:11:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-16 20:11:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-11-16 20:11:52,585 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-11-16 20:11:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:52,586 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-11-16 20:11:52,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-11-16 20:11:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:11:52,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:52,600 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:52,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:11:52,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash -141800136, now seen corresponding path program 1 times [2022-11-16 20:11:52,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:52,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221036084] [2022-11-16 20:11:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:11:52,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221036084] [2022-11-16 20:11:52,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221036084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:52,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:52,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279033623] [2022-11-16 20:11:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:52,688 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:52,729 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-16 20:11:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-16 20:11:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:52,731 INFO L225 Difference]: With dead ends: 84 [2022-11-16 20:11:52,731 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 20:11:52,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:52,733 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:52,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 20:11:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-16 20:11:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-16 20:11:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-16 20:11:52,763 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2022-11-16 20:11:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:52,765 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-16 20:11:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-16 20:11:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 20:11:52,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:52,769 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:11:52,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1341431843, now seen corresponding path program 1 times [2022-11-16 20:11:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:52,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376756514] [2022-11-16 20:11:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:11:52,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376756514] [2022-11-16 20:11:52,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376756514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296566541] [2022-11-16 20:11:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:52,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:52,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:52,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:11:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:11:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:53,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:11:53,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296566541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:53,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:11:53,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-16 20:11:53,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778901809] [2022-11-16 20:11:53,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:53,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:11:53,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:53,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:11:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:11:53,095 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:11:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:53,239 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-11-16 20:11:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:11:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-11-16 20:11:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:53,242 INFO L225 Difference]: With dead ends: 140 [2022-11-16 20:11:53,242 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 20:11:53,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:11:53,249 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:53,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 141 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 20:11:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-11-16 20:11:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 58 states have internal predecessors, (63), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-16 20:11:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-16 20:11:53,261 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 38 [2022-11-16 20:11:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:53,261 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-16 20:11:53,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:11:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-16 20:11:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 20:11:53,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:53,262 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:53,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:53,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash -88974329, now seen corresponding path program 1 times [2022-11-16 20:11:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:53,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049944696] [2022-11-16 20:11:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:53,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:11:53,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049944696] [2022-11-16 20:11:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049944696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449002113] [2022-11-16 20:11:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:53,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:53,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:53,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:11:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:11:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:53,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:11:53,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449002113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:53,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652472933] [2022-11-16 20:11:53,927 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 20:11:53,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:53,931 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) [2022-11-16 20:11:53,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:11:53,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-16 20:11:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487830192] [2022-11-16 20:11:53,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:53,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 20:11:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 20:11:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:11:53,941 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 20:11:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:54,518 INFO L93 Difference]: Finished difference Result 201 states and 266 transitions. [2022-11-16 20:11:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:11:54,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-11-16 20:11:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:54,520 INFO L225 Difference]: With dead ends: 201 [2022-11-16 20:11:54,520 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 20:11:54,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:11:54,522 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 128 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:54,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 515 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:11:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 20:11:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2022-11-16 20:11:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (35), 17 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-16 20:11:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2022-11-16 20:11:54,540 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 29 [2022-11-16 20:11:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:54,540 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2022-11-16 20:11:54,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 20:11:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2022-11-16 20:11:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 20:11:54,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:54,542 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:54,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:54,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:11:54,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:54,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1080973755, now seen corresponding path program 2 times [2022-11-16 20:11:54,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:54,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676420033] [2022-11-16 20:11:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:54,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:11:54,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:54,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676420033] [2022-11-16 20:11:54,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676420033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875780557] [2022-11-16 20:11:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:11:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:54,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:54,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:11:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 20:11:54,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:11:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:11:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:11:54,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:11:54,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875780557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:54,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:11:54,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-16 20:11:54,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141796496] [2022-11-16 20:11:54,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:54,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:54,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:11:54,961 INFO L87 Difference]: Start difference. First operand 120 states and 157 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:54,996 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2022-11-16 20:11:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-16 20:11:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:55,000 INFO L225 Difference]: With dead ends: 131 [2022-11-16 20:11:55,000 INFO L226 Difference]: Without dead ends: 130 [2022-11-16 20:11:55,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:11:55,002 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:55,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-16 20:11:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-11-16 20:11:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (35), 19 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-16 20:11:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2022-11-16 20:11:55,032 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 41 [2022-11-16 20:11:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:55,033 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2022-11-16 20:11:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:55,033 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2022-11-16 20:11:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 20:11:55,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:55,037 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:55,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:55,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:55,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -849551892, now seen corresponding path program 1 times [2022-11-16 20:11:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:55,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037102358] [2022-11-16 20:11:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:11:55,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:55,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037102358] [2022-11-16 20:11:55,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037102358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954779723] [2022-11-16 20:11:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:55,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:55,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:11:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:11:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:11:55,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:11:55,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954779723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:55,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272395563] [2022-11-16 20:11:55,514 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-16 20:11:55,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:55,515 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) [2022-11-16 20:11:55,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:11:55,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-11-16 20:11:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934823587] [2022-11-16 20:11:55,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:11:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:11:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:11:55,517 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 20:11:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:55,628 INFO L93 Difference]: Finished difference Result 152 states and 200 transitions. [2022-11-16 20:11:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:11:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-11-16 20:11:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:55,630 INFO L225 Difference]: With dead ends: 152 [2022-11-16 20:11:55,630 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 20:11:55,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:11:55,631 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 18 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 214 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 20:11:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2022-11-16 20:11:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 108 states have internal predecessors, (125), 18 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (41), 24 states have call predecessors, (41), 17 states have call successors, (41) [2022-11-16 20:11:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2022-11-16 20:11:55,644 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 42 [2022-11-16 20:11:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:55,644 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2022-11-16 20:11:55,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 20:11:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2022-11-16 20:11:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 20:11:55,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:55,646 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:55,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:55,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:55,851 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -837689372, now seen corresponding path program 1 times [2022-11-16 20:11:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:55,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947486178] [2022-11-16 20:11:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:55,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 20:11:55,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:55,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947486178] [2022-11-16 20:11:55,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947486178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:55,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:55,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69806245] [2022-11-16 20:11:55,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:55,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:55,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:55,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:55,923 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:55,990 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2022-11-16 20:11:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-11-16 20:11:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:55,996 INFO L225 Difference]: With dead ends: 152 [2022-11-16 20:11:55,996 INFO L226 Difference]: Without dead ends: 151 [2022-11-16 20:11:55,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:55,998 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:55,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-16 20:11:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2022-11-16 20:11:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 17 states have call successors, (17), 6 states have call predecessors, (17), 9 states have return successors, (38), 23 states have call predecessors, (38), 16 states have call successors, (38) [2022-11-16 20:11:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 177 transitions. [2022-11-16 20:11:56,018 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 177 transitions. Word has length 42 [2022-11-16 20:11:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:56,018 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 177 transitions. [2022-11-16 20:11:56,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:11:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 177 transitions. [2022-11-16 20:11:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 20:11:56,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:56,020 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:56,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 20:11:56,020 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1385428873, now seen corresponding path program 1 times [2022-11-16 20:11:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691708548] [2022-11-16 20:11:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:56,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 20:11:56,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691708548] [2022-11-16 20:11:56,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691708548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905970363] [2022-11-16 20:11:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:56,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:56,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:56,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:11:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:11:56,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:11:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905970363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168865156] [2022-11-16 20:11:56,529 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-16 20:11:56,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:56,530 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) [2022-11-16 20:11:56,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:11:56,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 17 [2022-11-16 20:11:56,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739532896] [2022-11-16 20:11:56,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:56,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 20:11:56,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:56,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 20:11:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:11:56,532 INFO L87 Difference]: Start difference. First operand 135 states and 177 transitions. Second operand has 17 states, 16 states have (on average 4.1875) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:11:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:56,994 INFO L93 Difference]: Finished difference Result 286 states and 387 transitions. [2022-11-16 20:11:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 20:11:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-11-16 20:11:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:56,996 INFO L225 Difference]: With dead ends: 286 [2022-11-16 20:11:56,996 INFO L226 Difference]: Without dead ends: 171 [2022-11-16 20:11:57,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:11:57,008 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:57,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 164 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:11:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-16 20:11:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-11-16 20:11:57,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 123 states have internal predecessors, (138), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (38), 25 states have call predecessors, (38), 19 states have call successors, (38) [2022-11-16 20:11:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 196 transitions. [2022-11-16 20:11:57,021 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 196 transitions. Word has length 56 [2022-11-16 20:11:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:57,021 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 196 transitions. [2022-11-16 20:11:57,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:11:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2022-11-16 20:11:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 20:11:57,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:57,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:57,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 20:11:57,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1627248947, now seen corresponding path program 1 times [2022-11-16 20:11:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553710500] [2022-11-16 20:11:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 20:11:57,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553710500] [2022-11-16 20:11:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553710500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751588780] [2022-11-16 20:11:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:57,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:57,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:11:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:11:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:11:57,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:11:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:11:57,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751588780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:11:57,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369653458] [2022-11-16 20:11:57,767 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-16 20:11:57,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:11:57,767 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) [2022-11-16 20:11:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:11:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 15] total 20 [2022-11-16 20:11:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428923523] [2022-11-16 20:11:57,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:11:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:11:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:11:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:11:57,771 INFO L87 Difference]: Start difference. First operand 157 states and 196 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:11:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:58,343 INFO L93 Difference]: Finished difference Result 314 states and 407 transitions. [2022-11-16 20:11:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 20:11:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-11-16 20:11:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:58,345 INFO L225 Difference]: With dead ends: 314 [2022-11-16 20:11:58,345 INFO L226 Difference]: Without dead ends: 190 [2022-11-16 20:11:58,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-11-16 20:11:58,347 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 239 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:58,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 192 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:11:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-16 20:11:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 172. [2022-11-16 20:11:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 136 states have internal predecessors, (151), 21 states have call successors, (21), 9 states have call predecessors, (21), 14 states have return successors, (37), 26 states have call predecessors, (37), 20 states have call successors, (37) [2022-11-16 20:11:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2022-11-16 20:11:58,359 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 47 [2022-11-16 20:11:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:58,359 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2022-11-16 20:11:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:11:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2022-11-16 20:11:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 20:11:58,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:58,360 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:58,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:58,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:58,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1585994505, now seen corresponding path program 1 times [2022-11-16 20:11:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149717452] [2022-11-16 20:11:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:11:58,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149717452] [2022-11-16 20:11:58,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149717452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:58,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:58,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178846129] [2022-11-16 20:11:58,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:58,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:58,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:58,637 INFO L87 Difference]: Start difference. First operand 172 states and 209 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:58,670 INFO L93 Difference]: Finished difference Result 184 states and 223 transitions. [2022-11-16 20:11:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-11-16 20:11:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:58,672 INFO L225 Difference]: With dead ends: 184 [2022-11-16 20:11:58,672 INFO L226 Difference]: Without dead ends: 183 [2022-11-16 20:11:58,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:58,673 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:58,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-16 20:11:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2022-11-16 20:11:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.1313868613138687) internal successors, (155), 138 states have internal predecessors, (155), 21 states have call successors, (21), 9 states have call predecessors, (21), 14 states have return successors, (37), 28 states have call predecessors, (37), 20 states have call successors, (37) [2022-11-16 20:11:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 213 transitions. [2022-11-16 20:11:58,688 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 213 transitions. Word has length 54 [2022-11-16 20:11:58,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:58,689 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 213 transitions. [2022-11-16 20:11:58,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 213 transitions. [2022-11-16 20:11:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 20:11:58,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:58,690 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:58,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 20:11:58,690 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:58,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1921189496, now seen corresponding path program 1 times [2022-11-16 20:11:58,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:58,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476429109] [2022-11-16 20:11:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:58,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:11:58,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476429109] [2022-11-16 20:11:58,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476429109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:58,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:58,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:58,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006618391] [2022-11-16 20:11:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:58,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:58,771 INFO L87 Difference]: Start difference. First operand 176 states and 213 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:58,807 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2022-11-16 20:11:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-16 20:11:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:58,811 INFO L225 Difference]: With dead ends: 183 [2022-11-16 20:11:58,811 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 20:11:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:58,812 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 20:11:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2022-11-16 20:11:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 138 states have internal predecessors, (154), 21 states have call successors, (21), 9 states have call predecessors, (21), 14 states have return successors, (37), 27 states have call predecessors, (37), 20 states have call successors, (37) [2022-11-16 20:11:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2022-11-16 20:11:58,825 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 55 [2022-11-16 20:11:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:58,825 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2022-11-16 20:11:58,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2022-11-16 20:11:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 20:11:58,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:58,826 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:58,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 20:11:58,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:58,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1932137144, now seen corresponding path program 1 times [2022-11-16 20:11:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:58,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267062314] [2022-11-16 20:11:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:11:58,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267062314] [2022-11-16 20:11:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267062314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518424604] [2022-11-16 20:11:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:58,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:11:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:11:59,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:11:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:11:59,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:11:59,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518424604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:59,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:11:59,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-16 20:11:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586015022] [2022-11-16 20:11:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:59,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:11:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:11:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:11:59,166 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 20:11:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:59,248 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2022-11-16 20:11:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:11:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2022-11-16 20:11:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:59,251 INFO L225 Difference]: With dead ends: 215 [2022-11-16 20:11:59,251 INFO L226 Difference]: Without dead ends: 214 [2022-11-16 20:11:59,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:11:59,252 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:59,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 199 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:11:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-16 20:11:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2022-11-16 20:11:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 150 states have internal predecessors, (166), 23 states have call successors, (23), 9 states have call predecessors, (23), 16 states have return successors, (50), 31 states have call predecessors, (50), 22 states have call successors, (50) [2022-11-16 20:11:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 239 transitions. [2022-11-16 20:11:59,265 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 239 transitions. Word has length 55 [2022-11-16 20:11:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:59,265 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 239 transitions. [2022-11-16 20:11:59,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 20:11:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 239 transitions. [2022-11-16 20:11:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 20:11:59,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:59,266 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:59,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:11:59,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 20:11:59,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:59,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash -233290583, now seen corresponding path program 1 times [2022-11-16 20:11:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:59,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861721804] [2022-11-16 20:11:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:59,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:11:59,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:59,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861721804] [2022-11-16 20:11:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861721804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:59,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:59,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649439899] [2022-11-16 20:11:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:59,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:59,531 INFO L87 Difference]: Start difference. First operand 191 states and 239 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:59,572 INFO L93 Difference]: Finished difference Result 207 states and 257 transitions. [2022-11-16 20:11:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-11-16 20:11:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:59,575 INFO L225 Difference]: With dead ends: 207 [2022-11-16 20:11:59,575 INFO L226 Difference]: Without dead ends: 206 [2022-11-16 20:11:59,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:59,576 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:59,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-16 20:11:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 191. [2022-11-16 20:11:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 149 states have (on average 1.1342281879194631) internal successors, (169), 149 states have internal predecessors, (169), 22 states have call successors, (22), 9 states have call predecessors, (22), 16 states have return successors, (46), 32 states have call predecessors, (46), 21 states have call successors, (46) [2022-11-16 20:11:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2022-11-16 20:11:59,588 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 56 [2022-11-16 20:11:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:59,588 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2022-11-16 20:11:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2022-11-16 20:11:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 20:11:59,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:59,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 20:11:59,590 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -321718703, now seen corresponding path program 1 times [2022-11-16 20:11:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971164915] [2022-11-16 20:11:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 20:11:59,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971164915] [2022-11-16 20:11:59,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971164915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:11:59,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:11:59,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:11:59,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084508365] [2022-11-16 20:11:59,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:11:59,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:11:59,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:11:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:11:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:59,654 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:11:59,686 INFO L93 Difference]: Finished difference Result 197 states and 243 transitions. [2022-11-16 20:11:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:11:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-11-16 20:11:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:11:59,688 INFO L225 Difference]: With dead ends: 197 [2022-11-16 20:11:59,688 INFO L226 Difference]: Without dead ends: 196 [2022-11-16 20:11:59,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:11:59,690 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:11:59,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:11:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-16 20:11:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2022-11-16 20:11:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 147 states have (on average 1.1224489795918366) internal successors, (165), 148 states have internal predecessors, (165), 22 states have call successors, (22), 9 states have call predecessors, (22), 16 states have return successors, (46), 31 states have call predecessors, (46), 21 states have call successors, (46) [2022-11-16 20:11:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 233 transitions. [2022-11-16 20:11:59,710 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 233 transitions. Word has length 60 [2022-11-16 20:11:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:11:59,710 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 233 transitions. [2022-11-16 20:11:59,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 20:11:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 233 transitions. [2022-11-16 20:11:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 20:11:59,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:11:59,717 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:11:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 20:11:59,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:11:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:11:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -905624898, now seen corresponding path program 1 times [2022-11-16 20:11:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:11:59,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409472200] [2022-11-16 20:11:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:11:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 20:11:59,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:11:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409472200] [2022-11-16 20:11:59,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409472200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:11:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440177436] [2022-11-16 20:11:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:11:59,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:11:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:11:59,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:11:59,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:11:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:11:59,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:11:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 20:12:00,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 20:12:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440177436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075038022] [2022-11-16 20:12:00,386 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:00,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:00,386 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) [2022-11-16 20:12:00,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:00,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2022-11-16 20:12:00,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576880726] [2022-11-16 20:12:00,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:00,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 20:12:00,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 20:12:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:12:00,390 INFO L87 Difference]: Start difference. First operand 189 states and 233 transitions. Second operand has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 22 states have internal predecessors, (86), 10 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-16 20:12:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:01,437 INFO L93 Difference]: Finished difference Result 341 states and 425 transitions. [2022-11-16 20:12:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 20:12:01,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 22 states have internal predecessors, (86), 10 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2022-11-16 20:12:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:01,439 INFO L225 Difference]: With dead ends: 341 [2022-11-16 20:12:01,439 INFO L226 Difference]: Without dead ends: 209 [2022-11-16 20:12:01,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1936, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 20:12:01,441 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:01,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 146 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:12:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-16 20:12:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 179. [2022-11-16 20:12:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.102189781021898) internal successors, (151), 142 states have internal predecessors, (151), 22 states have call successors, (22), 9 states have call predecessors, (22), 16 states have return successors, (38), 27 states have call predecessors, (38), 21 states have call successors, (38) [2022-11-16 20:12:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 211 transitions. [2022-11-16 20:12:01,456 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 211 transitions. Word has length 74 [2022-11-16 20:12:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:01,457 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 211 transitions. [2022-11-16 20:12:01,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 22 states have internal predecessors, (86), 10 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-16 20:12:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 211 transitions. [2022-11-16 20:12:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 20:12:01,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:01,459 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:01,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 20:12:01,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 20:12:01,664 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 321505840, now seen corresponding path program 1 times [2022-11-16 20:12:01,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:01,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432051454] [2022-11-16 20:12:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:12:01,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432051454] [2022-11-16 20:12:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432051454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773329459] [2022-11-16 20:12:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:01,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:01,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:01,816 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:01,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:12:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:01,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:12:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:12:01,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:12:02,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773329459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778467378] [2022-11-16 20:12:02,196 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:02,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:02,197 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) [2022-11-16 20:12:02,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:02,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-11-16 20:12:02,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885382091] [2022-11-16 20:12:02,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 20:12:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 20:12:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:12:02,200 INFO L87 Difference]: Start difference. First operand 179 states and 211 transitions. Second operand has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 20:12:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:02,482 INFO L93 Difference]: Finished difference Result 316 states and 373 transitions. [2022-11-16 20:12:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:12:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 68 [2022-11-16 20:12:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:02,486 INFO L225 Difference]: With dead ends: 316 [2022-11-16 20:12:02,486 INFO L226 Difference]: Without dead ends: 191 [2022-11-16 20:12:02,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:12:02,487 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:02,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 195 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-16 20:12:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 179. [2022-11-16 20:12:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.102189781021898) internal successors, (151), 142 states have internal predecessors, (151), 22 states have call successors, (22), 9 states have call predecessors, (22), 16 states have return successors, (36), 27 states have call predecessors, (36), 21 states have call successors, (36) [2022-11-16 20:12:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 209 transitions. [2022-11-16 20:12:02,501 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 209 transitions. Word has length 68 [2022-11-16 20:12:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 209 transitions. [2022-11-16 20:12:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 20:12:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 209 transitions. [2022-11-16 20:12:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 20:12:02,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:02,504 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:02,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:02,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:02,709 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:02,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1073537951, now seen corresponding path program 1 times [2022-11-16 20:12:02,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:02,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443387168] [2022-11-16 20:12:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:12:02,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443387168] [2022-11-16 20:12:02,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443387168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:02,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2742933] [2022-11-16 20:12:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:02,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:02,811 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:02,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:12:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:12:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:12:02,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:12:03,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2742933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:03,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896931424] [2022-11-16 20:12:03,052 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:03,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:03,052 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) [2022-11-16 20:12:03,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:03,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-16 20:12:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337917409] [2022-11-16 20:12:03,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 20:12:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 20:12:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:12:03,055 INFO L87 Difference]: Start difference. First operand 179 states and 209 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:12:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:03,224 INFO L93 Difference]: Finished difference Result 298 states and 346 transitions. [2022-11-16 20:12:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:12:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2022-11-16 20:12:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:03,226 INFO L225 Difference]: With dead ends: 298 [2022-11-16 20:12:03,226 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 20:12:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:12:03,227 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 57 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:03,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 207 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 20:12:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2022-11-16 20:12:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 137 states have (on average 1.102189781021898) internal successors, (151), 142 states have internal predecessors, (151), 22 states have call successors, (22), 9 states have call predecessors, (22), 16 states have return successors, (35), 27 states have call predecessors, (35), 21 states have call successors, (35) [2022-11-16 20:12:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 208 transitions. [2022-11-16 20:12:03,239 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 208 transitions. Word has length 69 [2022-11-16 20:12:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:03,239 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 208 transitions. [2022-11-16 20:12:03,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:12:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 208 transitions. [2022-11-16 20:12:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 20:12:03,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:03,241 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:03,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:03,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:03,446 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1965324685, now seen corresponding path program 1 times [2022-11-16 20:12:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:03,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63635563] [2022-11-16 20:12:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:12:03,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:03,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63635563] [2022-11-16 20:12:03,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63635563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:03,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694387442] [2022-11-16 20:12:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:03,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:03,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:03,702 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:03,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:12:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:12:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-16 20:12:03,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 20:12:04,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694387442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276929540] [2022-11-16 20:12:04,462 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:04,462 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:04,463 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) [2022-11-16 20:12:04,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:04,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 30 [2022-11-16 20:12:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165659284] [2022-11-16 20:12:04,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 20:12:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 20:12:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:12:04,466 INFO L87 Difference]: Start difference. First operand 179 states and 208 transitions. Second operand has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 27 states have internal predecessors, (98), 13 states have call successors, (16), 4 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 20:12:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:06,267 INFO L93 Difference]: Finished difference Result 373 states and 453 transitions. [2022-11-16 20:12:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 20:12:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 27 states have internal predecessors, (98), 13 states have call successors, (16), 4 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 73 [2022-11-16 20:12:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:06,269 INFO L225 Difference]: With dead ends: 373 [2022-11-16 20:12:06,269 INFO L226 Difference]: Without dead ends: 214 [2022-11-16 20:12:06,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=549, Invalid=3611, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 20:12:06,272 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:06,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 145 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 20:12:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-16 20:12:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 170. [2022-11-16 20:12:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 135 states have internal predecessors, (141), 20 states have call successors, (20), 9 states have call predecessors, (20), 16 states have return successors, (46), 25 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-16 20:12:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 207 transitions. [2022-11-16 20:12:06,283 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 207 transitions. Word has length 73 [2022-11-16 20:12:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:06,283 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 207 transitions. [2022-11-16 20:12:06,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 27 states have internal predecessors, (98), 13 states have call successors, (16), 4 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-16 20:12:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 207 transitions. [2022-11-16 20:12:06,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 20:12:06,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:06,285 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:06,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:06,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 20:12:06,490 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1260269862, now seen corresponding path program 1 times [2022-11-16 20:12:06,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:06,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938273892] [2022-11-16 20:12:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:06,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 20:12:06,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938273892] [2022-11-16 20:12:06,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938273892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:06,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523582071] [2022-11-16 20:12:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:06,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:12:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:12:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:12:06,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:12:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523582071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877054424] [2022-11-16 20:12:07,023 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:07,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:07,023 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) [2022-11-16 20:12:07,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:07,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 15 [2022-11-16 20:12:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201444791] [2022-11-16 20:12:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:07,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:12:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:12:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:12:07,025 INFO L87 Difference]: Start difference. First operand 170 states and 207 transitions. Second operand has 15 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-16 20:12:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:07,307 INFO L93 Difference]: Finished difference Result 294 states and 373 transitions. [2022-11-16 20:12:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:12:07,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 87 [2022-11-16 20:12:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:07,309 INFO L225 Difference]: With dead ends: 294 [2022-11-16 20:12:07,309 INFO L226 Difference]: Without dead ends: 172 [2022-11-16 20:12:07,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:12:07,310 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 102 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:07,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 197 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-16 20:12:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2022-11-16 20:12:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 135 states have internal predecessors, (141), 20 states have call successors, (20), 9 states have call predecessors, (20), 16 states have return successors, (45), 25 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-16 20:12:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2022-11-16 20:12:07,323 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 87 [2022-11-16 20:12:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:07,324 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2022-11-16 20:12:07,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.571428571428571) internal successors, (78), 13 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-16 20:12:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2022-11-16 20:12:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 20:12:07,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:07,331 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:07,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 20:12:07,536 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1783774025, now seen corresponding path program 2 times [2022-11-16 20:12:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758255039] [2022-11-16 20:12:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 20:12:07,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758255039] [2022-11-16 20:12:07,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758255039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:07,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743008706] [2022-11-16 20:12:07,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:12:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:07,871 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:07,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:12:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:12:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:12:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 20:12:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-16 20:12:08,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 20:12:08,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743008706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564789670] [2022-11-16 20:12:08,779 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:08,779 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:08,780 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) [2022-11-16 20:12:08,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:08,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-11-16 20:12:08,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189817397] [2022-11-16 20:12:08,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:08,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:12:08,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:12:08,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:12:08,785 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-16 20:12:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:09,161 INFO L93 Difference]: Finished difference Result 225 states and 280 transitions. [2022-11-16 20:12:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 20:12:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) Word has length 88 [2022-11-16 20:12:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:09,164 INFO L225 Difference]: With dead ends: 225 [2022-11-16 20:12:09,164 INFO L226 Difference]: Without dead ends: 223 [2022-11-16 20:12:09,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 153 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=1615, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 20:12:09,165 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:09,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 439 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:12:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-16 20:12:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 150. [2022-11-16 20:12:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 120 states have internal predecessors, (123), 17 states have call successors, (17), 9 states have call predecessors, (17), 15 states have return successors, (32), 20 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-16 20:12:09,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-11-16 20:12:09,178 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 88 [2022-11-16 20:12:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:09,179 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-11-16 20:12:09,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-16 20:12:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-11-16 20:12:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 20:12:09,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:09,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:09,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:09,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:09,386 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash -537580002, now seen corresponding path program 1 times [2022-11-16 20:12:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:09,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282970102] [2022-11-16 20:12:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 20:12:09,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282970102] [2022-11-16 20:12:09,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282970102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:09,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219743769] [2022-11-16 20:12:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:09,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:09,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:09,692 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:09,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:12:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:12:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 20:12:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 20:12:10,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219743769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772632950] [2022-11-16 20:12:10,588 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:10,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:10,589 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) [2022-11-16 20:12:10,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 33 [2022-11-16 20:12:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94173769] [2022-11-16 20:12:10,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:12:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:12:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:12:10,592 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 34 states have internal predecessors, (93), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-16 20:12:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:11,132 INFO L93 Difference]: Finished difference Result 283 states and 349 transitions. [2022-11-16 20:12:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 20:12:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 34 states have internal predecessors, (93), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) Word has length 89 [2022-11-16 20:12:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:11,134 INFO L225 Difference]: With dead ends: 283 [2022-11-16 20:12:11,134 INFO L226 Difference]: Without dead ends: 269 [2022-11-16 20:12:11,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:12:11,135 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 66 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:11,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 478 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:12:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-16 20:12:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 203. [2022-11-16 20:12:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 161 states have internal predecessors, (164), 21 states have call successors, (21), 9 states have call predecessors, (21), 22 states have return successors, (55), 32 states have call predecessors, (55), 20 states have call successors, (55) [2022-11-16 20:12:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 240 transitions. [2022-11-16 20:12:11,149 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 240 transitions. Word has length 89 [2022-11-16 20:12:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:11,152 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 240 transitions. [2022-11-16 20:12:11,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 34 states have internal predecessors, (93), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-16 20:12:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 240 transitions. [2022-11-16 20:12:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-16 20:12:11,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:11,171 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 20:12:11,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:11,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 20:12:11,376 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1296006127, now seen corresponding path program 1 times [2022-11-16 20:12:11,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:11,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718961645] [2022-11-16 20:12:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:11,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:12:11,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718961645] [2022-11-16 20:12:11,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718961645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663144934] [2022-11-16 20:12:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:11,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:11,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:11,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:11,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 20:12:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:11,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:12:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:12:11,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 20:12:11,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663144934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:11,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293758260] [2022-11-16 20:12:11,910 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:11,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:11,911 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) [2022-11-16 20:12:11,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:11,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-16 20:12:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047943448] [2022-11-16 20:12:11,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:11,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:12:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:12:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:12:11,917 INFO L87 Difference]: Start difference. First operand 203 states and 240 transitions. Second operand has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 20:12:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:12,097 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2022-11-16 20:12:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:12:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 122 [2022-11-16 20:12:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:12,100 INFO L225 Difference]: With dead ends: 231 [2022-11-16 20:12:12,100 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 20:12:12,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 238 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:12:12,101 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:12,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 124 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 20:12:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-11-16 20:12:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 161 states have internal predecessors, (164), 21 states have call successors, (21), 9 states have call predecessors, (21), 22 states have return successors, (54), 32 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-16 20:12:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 239 transitions. [2022-11-16 20:12:12,113 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 239 transitions. Word has length 122 [2022-11-16 20:12:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:12,113 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 239 transitions. [2022-11-16 20:12:12,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 20:12:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 239 transitions. [2022-11-16 20:12:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-16 20:12:12,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:12,116 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-16 20:12:12,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 20:12:12,321 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -371531240, now seen corresponding path program 2 times [2022-11-16 20:12:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422566667] [2022-11-16 20:12:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-11-16 20:12:12,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:12,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422566667] [2022-11-16 20:12:12,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422566667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:12:12,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:12:12,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:12:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449087242] [2022-11-16 20:12:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:12:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:12:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:12:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:12:12,433 INFO L87 Difference]: Start difference. First operand 203 states and 239 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:12:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:12,464 INFO L93 Difference]: Finished difference Result 210 states and 246 transitions. [2022-11-16 20:12:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:12:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 174 [2022-11-16 20:12:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:12,466 INFO L225 Difference]: With dead ends: 210 [2022-11-16 20:12:12,466 INFO L226 Difference]: Without dead ends: 209 [2022-11-16 20:12:12,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:12:12,469 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:12,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:12:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-16 20:12:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2022-11-16 20:12:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 161 states have internal predecessors, (164), 21 states have call successors, (21), 9 states have call predecessors, (21), 22 states have return successors, (54), 32 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-16 20:12:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 239 transitions. [2022-11-16 20:12:12,480 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 239 transitions. Word has length 174 [2022-11-16 20:12:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:12,481 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 239 transitions. [2022-11-16 20:12:12,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:12:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 239 transitions. [2022-11-16 20:12:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 20:12:12,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:12,484 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-16 20:12:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 20:12:12,484 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash 20755843, now seen corresponding path program 2 times [2022-11-16 20:12:12,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:12,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211863871] [2022-11-16 20:12:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 82 proven. 139 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-16 20:12:12,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211863871] [2022-11-16 20:12:12,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211863871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925988247] [2022-11-16 20:12:12,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:12:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:12,769 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:12,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 20:12:12,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:12:12,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:12:12,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:12:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 211 proven. 7 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-16 20:12:12,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 175 proven. 12 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-11-16 20:12:13,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925988247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952286293] [2022-11-16 20:12:13,475 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:13,475 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:13,475 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) [2022-11-16 20:12:13,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:13,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 22 [2022-11-16 20:12:13,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537378184] [2022-11-16 20:12:13,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:13,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:12:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:12:13,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-11-16 20:12:13,478 INFO L87 Difference]: Start difference. First operand 203 states and 239 transitions. Second operand has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-16 20:12:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:13,971 INFO L93 Difference]: Finished difference Result 312 states and 380 transitions. [2022-11-16 20:12:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 20:12:13,971 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 177 [2022-11-16 20:12:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:13,972 INFO L225 Difference]: With dead ends: 312 [2022-11-16 20:12:13,972 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 20:12:13,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:12:13,974 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:13,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 234 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:12:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 20:12:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-16 20:12:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.037037037037037) internal successors, (112), 110 states have internal predecessors, (112), 17 states have call successors, (17), 11 states have call predecessors, (17), 13 states have return successors, (21), 17 states have call predecessors, (21), 16 states have call successors, (21) [2022-11-16 20:12:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2022-11-16 20:12:13,982 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 177 [2022-11-16 20:12:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:13,983 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2022-11-16 20:12:13,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 12 states have call successors, (20), 3 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-16 20:12:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2022-11-16 20:12:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 20:12:13,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:13,985 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-11-16 20:12:13,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-16 20:12:14,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:14,190 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -435767511, now seen corresponding path program 3 times [2022-11-16 20:12:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503346210] [2022-11-16 20:12:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:14,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 141 proven. 52 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-16 20:12:14,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503346210] [2022-11-16 20:12:14,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503346210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124651456] [2022-11-16 20:12:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:12:14,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:14,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:14,480 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:14,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 20:12:14,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:12:14,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:12:14,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:12:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 74 proven. 156 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-16 20:12:14,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 74 proven. 162 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-16 20:12:15,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124651456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789163371] [2022-11-16 20:12:15,652 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:15,652 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:15,652 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) [2022-11-16 20:12:15,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:15,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 25 [2022-11-16 20:12:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799311478] [2022-11-16 20:12:15,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:15,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 20:12:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 20:12:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:12:15,656 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 15 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2022-11-16 20:12:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:16,265 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2022-11-16 20:12:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 20:12:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 15 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 160 [2022-11-16 20:12:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:16,267 INFO L225 Difference]: With dead ends: 156 [2022-11-16 20:12:16,267 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 20:12:16,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 302 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 20:12:16,268 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:16,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 235 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:12:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 20:12:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-11-16 20:12:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-16 20:12:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-11-16 20:12:16,275 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 160 [2022-11-16 20:12:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:16,276 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-11-16 20:12:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 15 states have call successors, (23), 2 states have call predecessors, (23), 7 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2022-11-16 20:12:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-11-16 20:12:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 20:12:16,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:12:16,278 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-16 20:12:16,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:16,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 20:12:16,483 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-16 20:12:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:12:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash -653882477, now seen corresponding path program 4 times [2022-11-16 20:12:16,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:12:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957196324] [2022-11-16 20:12:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:12:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:12:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 20:12:17,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:12:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957196324] [2022-11-16 20:12:17,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957196324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:12:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491094614] [2022-11-16 20:12:17,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:12:17,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:12:17,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:12:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 20:12:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:12:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 20:12:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:12:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-16 20:12:17,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:12:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 74 proven. 51 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-16 20:12:18,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491094614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:12:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837174611] [2022-11-16 20:12:18,925 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-16 20:12:18,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:12:18,926 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) [2022-11-16 20:12:18,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:12:18,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2022-11-16 20:12:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093121652] [2022-11-16 20:12:18,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:12:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 20:12:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:12:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 20:12:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 20:12:18,929 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-16 20:12:19,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:12:19,121 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-11-16 20:12:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 20:12:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) Word has length 141 [2022-11-16 20:12:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:12:19,123 INFO L225 Difference]: With dead ends: 112 [2022-11-16 20:12:19,123 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 20:12:19,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 253 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:12:19,124 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:12:19,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 482 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:12:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 20:12:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 20:12:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:12:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 20:12:19,126 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 141 [2022-11-16 20:12:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:12:19,126 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 20:12:19,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-16 20:12:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 20:12:19,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 20:12:19,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2022-11-16 20:12:19,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2022-11-16 20:12:19,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2022-11-16 20:12:19,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2022-11-16 20:12:19,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2022-11-16 20:12:19,130 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2022-11-16 20:12:19,131 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2022-11-16 20:12:19,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 20:12:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:12:19,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 20:12:21,477 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 20:12:21,477 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 20:12:21,478 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 5 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 5)) [2022-11-16 20:12:21,478 INFO L895 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 5) [2022-11-16 20:12:21,478 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-11-16 20:12:21,478 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,478 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,478 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,479 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,479 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (or (and (<= |fibo2_#in~n| fibo2_~n) (<= fibo2_~n |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 4)))) [2022-11-16 20:12:21,479 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,479 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,479 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= 4 |fibo2_#in~n|))) (and (or (and (<= 4 fibo2_~n) (<= |fibo2_#t~ret6| 2) .cse0 (<= 2 |fibo2_#t~ret6|)) (not .cse1) (not (<= |fibo2_#in~n| 4))) (or (< 1 fibo2_~n) (not (<= |fibo2_#in~n| 2))) (or (and (= |fibo2_#t~ret6| 1) (<= |fibo2_#in~n| fibo2_~n) .cse0) .cse1))) [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,480 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-16 20:12:21,481 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,482 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,482 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,482 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,482 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (or (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) (not (<= |fibo1_#in~n| 3))) (or (and (<= fibo1_~n 5) (<= 5 fibo1_~n)) (not (<= |fibo1_#in~n| 5)) (not (<= 5 |fibo1_#in~n|)))) [2022-11-16 20:12:21,482 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,482 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,483 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,483 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-11-16 20:12:21,483 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,483 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (and (or (and (<= fibo1_~n 5) (<= |fibo1_#t~ret4| 3) (<= 1 |fibo1_#t~ret4|) (<= 5 fibo1_~n)) (not (<= |fibo1_#in~n| 5)) (not (<= 5 |fibo1_#in~n|))) (or (and (<= fibo1_~n |fibo1_#in~n|) (= |fibo1_#t~ret4| 1) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) (not (<= |fibo1_#in~n| 3)))) [2022-11-16 20:12:21,483 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,483 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-11-16 20:12:21,484 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-11-16 20:12:21,485 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-11-16 20:12:21,488 INFO L444 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:12:21,490 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 20:12:21,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:12:21 BoogieIcfgContainer [2022-11-16 20:12:21,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 20:12:21,503 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 20:12:21,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 20:12:21,503 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 20:12:21,504 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:11:50" (3/4) ... [2022-11-16 20:12:21,506 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 20:12:21,512 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-11-16 20:12:21,512 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-11-16 20:12:21,515 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-16 20:12:21,516 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-16 20:12:21,516 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-16 20:12:21,516 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 20:12:21,548 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 20:12:21,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 20:12:21,549 INFO L158 Benchmark]: Toolchain (without parser) took 32197.19ms. Allocated memory was 117.4MB in the beginning and 249.6MB in the end (delta: 132.1MB). Free memory was 77.8MB in the beginning and 109.6MB in the end (delta: -31.9MB). Peak memory consumption was 101.0MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,550 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:12:21,550 INFO L158 Benchmark]: CACSL2BoogieTranslator took 266.37ms. Allocated memory is still 117.4MB. Free memory was 77.6MB in the beginning and 93.7MB in the end (delta: -16.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,550 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.81ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,551 INFO L158 Benchmark]: Boogie Preprocessor took 18.54ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 91.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:12:21,551 INFO L158 Benchmark]: RCFGBuilder took 387.99ms. Allocated memory is still 117.4MB. Free memory was 91.0MB in the beginning and 78.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,551 INFO L158 Benchmark]: TraceAbstraction took 31422.91ms. Allocated memory was 117.4MB in the beginning and 249.6MB in the end (delta: 132.1MB). Free memory was 78.1MB in the beginning and 112.8MB in the end (delta: -34.7MB). Peak memory consumption was 139.2MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,552 INFO L158 Benchmark]: Witness Printer took 46.04ms. Allocated memory is still 249.6MB. Free memory was 112.8MB in the beginning and 109.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 20:12:21,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory is still 94.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 266.37ms. Allocated memory is still 117.4MB. Free memory was 77.6MB in the beginning and 93.7MB in the end (delta: -16.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.81ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 92.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.54ms. Allocated memory is still 117.4MB. Free memory was 92.1MB in the beginning and 91.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 387.99ms. Allocated memory is still 117.4MB. Free memory was 91.0MB in the beginning and 78.6MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 31422.91ms. Allocated memory was 117.4MB in the beginning and 249.6MB in the end (delta: 132.1MB). Free memory was 78.1MB in the beginning and 112.8MB in the end (delta: -34.7MB). Peak memory consumption was 139.2MB. Max. memory is 16.1GB. * Witness Printer took 46.04ms. Allocated memory is still 249.6MB. Free memory was 112.8MB in the beginning and 109.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 31.4s, OverallIterations: 32, TraceHistogramMax: 11, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2152 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2057 mSDsluCounter, 5984 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4883 mSDsCounter, 770 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8402 IncrementalHoareTripleChecker+Invalid, 9172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 770 mSolverCounterUnsat, 1101 mSDtfsCounter, 8402 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3223 GetRequests, 2594 SyntacticMatches, 89 SemanticMatches, 540 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203occurred in iteration=27, InterpolantAutomatonStates: 395, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 32 MinimizatonAttempts, 417 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 446 PreInvPairs, 695 NumberOfFragments, 147 HoareAnnotationTreeSize, 446 FomulaSimplifications, 13855 FormulaSimplificationTreeSizeReduction, 1.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 12340 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.3s InterpolantComputationTime, 3511 NumberOfCodeBlocks, 3306 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 4767 ConstructedInterpolants, 0 QuantifiedInterpolants, 9457 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2852 ConjunctsInSsa, 204 ConjunctsInUnsatCore, 66 InterpolantComputations, 17 PerfectInterpolantSequences, 5790/7110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: x <= 5 RESULT: Ultimate proved your program to be correct! [2022-11-16 20:12:21,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af7233f8-40d4-4bb9-85bf-fc4e78b950c9/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE