./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW --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 aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a --- 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-4e7fbc6 [2022-11-23 15:21:34,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:21:34,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:21:34,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:21:34,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:21:34,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:21:34,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:21:34,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:21:34,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:21:34,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:21:34,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:21:34,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:21:34,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:21:34,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:21:34,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:21:34,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:21:34,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:21:34,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:21:34,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:21:34,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:21:34,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:21:34,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:21:34,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:21:34,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:21:34,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:21:34,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:21:34,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:21:34,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:21:34,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:21:34,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:21:34,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:21:34,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:21:34,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:21:34,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:21:34,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:21:34,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:21:34,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:21:34,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:21:34,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:21:34,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:21:34,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:21:34,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-23 15:21:34,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:21:34,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:21:34,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:21:34,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:21:34,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:21:34,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:21:34,278 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:21:34,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:21:34,278 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:21:34,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:21:34,279 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:21:34,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:21:34,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:21:34,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:21:34,280 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:21:34,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:21:34,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:21:34,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:21:34,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:21:34,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:21:34,282 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:21:34,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:21:34,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:21:34,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:21:34,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:21:34,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:21:34,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:21:34,283 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 15:21:34,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:21:34,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:21:34,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:21:34,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:21:34,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:21:34,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:21:34,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:34,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:21:34,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:21:34,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:21:34,287 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_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a [2022-11-23 15:21:34,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:21:34,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:21:34,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:21:34,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:21:34,615 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:21:34,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2022-11-23 15:21:37,780 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:38,035 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:38,035 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2022-11-23 15:21:38,042 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/data/f50398fa1/35327f4045234b5198a83533c9533ac8/FLAG0cc466d8d [2022-11-23 15:21:38,062 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/data/f50398fa1/35327f4045234b5198a83533c9533ac8 [2022-11-23 15:21:38,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:38,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:38,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:38,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:38,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:38,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639ef3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38, skipping insertion in model container [2022-11-23 15:21:38,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:38,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:38,278 WARN L237 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_234c583e-5c6c-408b-b615-fb173d5fbe75/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2022-11-23 15:21:38,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:38,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:38,313 WARN L237 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_234c583e-5c6c-408b-b615-fb173d5fbe75/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2022-11-23 15:21:38,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:38,329 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:38,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38 WrapperNode [2022-11-23 15:21:38,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:38,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:38,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:38,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:38,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,370 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2022-11-23 15:21:38,370 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:38,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:38,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:38,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:38,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,407 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:38,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:38,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:38,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:38,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (1/1) ... [2022-11-23 15:21:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:38,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:38,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:38,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:21:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:38,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:38,565 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:38,567 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:38,694 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:21:38,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:21:38,725 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:21:38,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:38 BoogieIcfgContainer [2022-11-23 15:21:38,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:21:38,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:21:38,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:21:38,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:21:38,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:38" (1/3) ... [2022-11-23 15:21:38,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bddcdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:38, skipping insertion in model container [2022-11-23 15:21:38,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:38" (2/3) ... [2022-11-23 15:21:38,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bddcdce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:38, skipping insertion in model container [2022-11-23 15:21:38,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:38" (3/3) ... [2022-11-23 15:21:38,743 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark36_conjunctive.i [2022-11-23 15:21:38,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:21:38,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-23 15:21:38,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:21:38,816 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@2f61ada7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:21:38,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 15:21:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-11-23 15:21:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:21:38,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:38,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:21:38,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2022-11-23 15:21:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612715162] [2022-11-23 15:21:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612715162] [2022-11-23 15:21:39,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612715162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:39,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:39,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:39,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385048607] [2022-11-23 15:21:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:39,115 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-23 15:21:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:39,182 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-23 15:21:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:21:39,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:21:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:39,205 INFO L225 Difference]: With dead ends: 13 [2022-11-23 15:21:39,206 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:21:39,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:39,228 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:39,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:21:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:21:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-11-23 15:21:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-11-23 15:21:39,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 4 [2022-11-23 15:21:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:39,285 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-11-23 15:21:39,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-23 15:21:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-11-23 15:21:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:21:39,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:39,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:21:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:21:39,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2022-11-23 15:21:39,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:39,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571345650] [2022-11-23 15:21:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571345650] [2022-11-23 15:21:39,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571345650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:39,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:39,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:39,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134753576] [2022-11-23 15:21:39,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:39,419 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:39,462 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-11-23 15:21:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:21:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:21:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:39,468 INFO L225 Difference]: With dead ends: 14 [2022-11-23 15:21:39,468 INFO L226 Difference]: Without dead ends: 13 [2022-11-23 15:21:39,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:39,470 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:39,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-23 15:21:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-23 15:21:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.3) internal successors, (13), 12 states have internal predecessors, (13), 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) [2022-11-23 15:21:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-11-23 15:21:39,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2022-11-23 15:21:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:39,476 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-11-23 15:21:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-11-23 15:21:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:21:39,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:39,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:21:39,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:21:39,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2022-11-23 15:21:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260943540] [2022-11-23 15:21:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260943540] [2022-11-23 15:21:39,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260943540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:39,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:39,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:39,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733076960] [2022-11-23 15:21:39,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:39,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:39,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:39,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:39,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:39,575 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:39,612 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2022-11-23 15:21:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:21:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:21:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:39,615 INFO L225 Difference]: With dead ends: 13 [2022-11-23 15:21:39,616 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 15:21:39,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:39,617 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:39,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 15:21:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 15:21:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-11-23 15:21:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-23 15:21:39,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2022-11-23 15:21:39,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:39,622 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-23 15:21:39,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-23 15:21:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:21:39,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:39,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:39,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:21:39,624 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2022-11-23 15:21:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196895350] [2022-11-23 15:21:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196895350] [2022-11-23 15:21:39,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196895350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:39,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:39,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:21:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695214498] [2022-11-23 15:21:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:21:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:21:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:21:39,683 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-23 15:21:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:39,722 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-23 15:21:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:21:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:21:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:39,725 INFO L225 Difference]: With dead ends: 15 [2022-11-23 15:21:39,725 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:21:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:39,727 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:39,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:21:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:21:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-11-23 15:21:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-11-23 15:21:39,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2022-11-23 15:21:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:39,740 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-11-23 15:21:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-23 15:21:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-11-23 15:21:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:21:39,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:39,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:21:39,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 865667262, now seen corresponding path program 1 times [2022-11-23 15:21:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018983269] [2022-11-23 15:21:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:39,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018983269] [2022-11-23 15:21:39,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018983269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:39,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836489171] [2022-11-23 15:21:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:39,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:39,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:39,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:21:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:21:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:39,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:40,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836489171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:40,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209800621] [2022-11-23 15:21:40,114 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:40,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:40,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:40,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:40,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:40,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:40,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:40,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:40,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:40,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 15:21:40,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510980475] [2022-11-23 15:21:40,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:40,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:21:40,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:21:40,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:21:40,997 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-23 15:21:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:41,100 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-23 15:21:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:21:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 15:21:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:41,104 INFO L225 Difference]: With dead ends: 30 [2022-11-23 15:21:41,104 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:21:41,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:21:41,109 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:41,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:21:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-23 15:21:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 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) [2022-11-23 15:21:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-23 15:21:41,123 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2022-11-23 15:21:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:41,123 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-23 15:21:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-23 15:21:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-23 15:21:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:21:41,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:41,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2022-11-23 15:21:41,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:41,331 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1317414976, now seen corresponding path program 1 times [2022-11-23 15:21:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581248833] [2022-11-23 15:21:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:41,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581248833] [2022-11-23 15:21:41,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581248833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939077391] [2022-11-23 15:21:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:41,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:41,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:41,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:21:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:21:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:41,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939077391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:41,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731228677] [2022-11-23 15:21:41,563 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:41,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:41,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:41,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:41,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:41,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:42,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '379#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:42,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:42,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:42,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 15:21:42,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866932661] [2022-11-23 15:21:42,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:21:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:21:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:21:42,138 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 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) [2022-11-23 15:21:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:42,244 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-23 15:21:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:21:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:21:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:42,245 INFO L225 Difference]: With dead ends: 30 [2022-11-23 15:21:42,246 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:21:42,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:21:42,247 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:42,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:21:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 15:21:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-11-23 15:21:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-11-23 15:21:42,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 12 [2022-11-23 15:21:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-11-23 15:21:42,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 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) [2022-11-23 15:21:42,255 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-11-23 15:21:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:21:42,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:42,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1] [2022-11-23 15:21:42,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:42,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:21:42,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 446413744, now seen corresponding path program 2 times [2022-11-23 15:21:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:42,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255688998] [2022-11-23 15:21:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:42,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255688998] [2022-11-23 15:21:42,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255688998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607058736] [2022-11-23 15:21:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:21:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:42,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:42,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:21:42,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:21:42,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:42,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:21:42,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:42,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607058736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811168695] [2022-11-23 15:21:42,992 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:42,993 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:42,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:42,994 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:42,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:43,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:43,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '627#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:43,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:43,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:43,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-23 15:21:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190641672] [2022-11-23 15:21:43,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:43,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:21:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:21:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:21:43,529 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 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) [2022-11-23 15:21:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:43,803 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-11-23 15:21:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:21:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 15:21:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:43,805 INFO L225 Difference]: With dead ends: 63 [2022-11-23 15:21:43,805 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:21:43,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 15:21:43,807 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:43,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 49 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:21:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-11-23 15:21:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 56 states have internal predecessors, (62), 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) [2022-11-23 15:21:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-23 15:21:43,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 25 [2022-11-23 15:21:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:43,821 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-23 15:21:43,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 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) [2022-11-23 15:21:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-23 15:21:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:21:43,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:43,823 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1] [2022-11-23 15:21:43,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:21:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:44,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash -493119950, now seen corresponding path program 2 times [2022-11-23 15:21:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556287807] [2022-11-23 15:21:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:44,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:44,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556287807] [2022-11-23 15:21:44,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556287807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:44,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180877403] [2022-11-23 15:21:44,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:21:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:44,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:44,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:21:44,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:21:44,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:21:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:44,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:44,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180877403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:44,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676267390] [2022-11-23 15:21:44,479 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:44,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:44,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:44,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:44,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:44,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:45,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '972#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:45,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:45,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:45,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-23 15:21:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079393009] [2022-11-23 15:21:45,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:45,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:21:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:21:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:21:45,046 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 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) [2022-11-23 15:21:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:45,311 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-23 15:21:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:21:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 15:21:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:45,313 INFO L225 Difference]: With dead ends: 60 [2022-11-23 15:21:45,313 INFO L226 Difference]: Without dead ends: 59 [2022-11-23 15:21:45,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 15:21:45,315 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:45,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-23 15:21:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-23 15:21:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 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) [2022-11-23 15:21:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-11-23 15:21:45,325 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 27 [2022-11-23 15:21:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:45,326 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-11-23 15:21:45,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 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) [2022-11-23 15:21:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-11-23 15:21:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 15:21:45,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:45,333 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1] [2022-11-23 15:21:45,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:45,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:45,534 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1907423760, now seen corresponding path program 3 times [2022-11-23 15:21:45,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:45,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130827793] [2022-11-23 15:21:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:46,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130827793] [2022-11-23 15:21:46,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130827793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:46,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373659798] [2022-11-23 15:21:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:21:46,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:46,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:46,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:21:46,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:21:46,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:21:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373659798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:46,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992506159] [2022-11-23 15:21:46,850 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:46,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:46,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:46,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:46,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:47,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:47,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1508#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:47,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:47,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:47,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-23 15:21:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410521868] [2022-11-23 15:21:47,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:47,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 15:21:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 15:21:47,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=1988, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 15:21:47,652 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 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) [2022-11-23 15:21:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:48,335 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-11-23 15:21:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 15:21:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-23 15:21:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:48,336 INFO L225 Difference]: With dead ends: 129 [2022-11-23 15:21:48,337 INFO L226 Difference]: Without dead ends: 128 [2022-11-23 15:21:48,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1343, Invalid=3913, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 15:21:48,339 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:48,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 79 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-23 15:21:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2022-11-23 15:21:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 116 states have internal predecessors, (128), 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) [2022-11-23 15:21:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2022-11-23 15:21:48,350 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 55 [2022-11-23 15:21:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:48,351 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2022-11-23 15:21:48,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 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) [2022-11-23 15:21:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2022-11-23 15:21:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 15:21:48,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:48,352 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 1, 1, 1] [2022-11-23 15:21:48,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:48,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 916803698, now seen corresponding path program 3 times [2022-11-23 15:21:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:48,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820373113] [2022-11-23 15:21:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:49,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820373113] [2022-11-23 15:21:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820373113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745440197] [2022-11-23 15:21:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:21:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:49,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:49,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:21:49,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:21:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:21:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:49,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745440197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789391426] [2022-11-23 15:21:49,841 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:49,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:49,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:49,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:49,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:50,012 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:50,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2231#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:50,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:50,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:50,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-23 15:21:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355278087] [2022-11-23 15:21:50,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:50,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 15:21:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 15:21:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=1988, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 15:21:50,730 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 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) [2022-11-23 15:21:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:51,433 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2022-11-23 15:21:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 15:21:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-23 15:21:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:51,438 INFO L225 Difference]: With dead ends: 120 [2022-11-23 15:21:51,438 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 15:21:51,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1343, Invalid=3913, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 15:21:51,441 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:51,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 78 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:21:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 15:21:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-23 15:21:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 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) [2022-11-23 15:21:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-11-23 15:21:51,468 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 57 [2022-11-23 15:21:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-11-23 15:21:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 46 states have internal predecessors, (113), 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) [2022-11-23 15:21:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-11-23 15:21:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:21:51,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:51,477 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1] [2022-11-23 15:21:51,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:51,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:21:51,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 366430832, now seen corresponding path program 4 times [2022-11-23 15:21:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:51,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765327276] [2022-11-23 15:21:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:51,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:53,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765327276] [2022-11-23 15:21:53,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765327276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219279895] [2022-11-23 15:21:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:21:53,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:53,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:53,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:21:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 15:21:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:53,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219279895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:56,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128281712] [2022-11-23 15:21:56,042 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:56,042 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:56,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:56,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:56,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:56,210 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:57,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3343#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:57,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:57,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-23 15:21:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068786328] [2022-11-23 15:21:57,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-23 15:21:57,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-23 15:21:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2266, Invalid=7436, Unknown=0, NotChecked=0, Total=9702 [2022-11-23 15:21:57,478 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 94 states, 93 states have (on average 2.4623655913978495) internal successors, (229), 94 states have internal predecessors, (229), 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) [2022-11-23 15:21:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:59,472 INFO L93 Difference]: Finished difference Result 261 states and 284 transitions. [2022-11-23 15:21:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-23 15:21:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4623655913978495) internal successors, (229), 94 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-11-23 15:21:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:59,474 INFO L225 Difference]: With dead ends: 261 [2022-11-23 15:21:59,474 INFO L226 Difference]: Without dead ends: 260 [2022-11-23 15:21:59,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 271 SyntacticMatches, 22 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7647 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5555, Invalid=15325, Unknown=0, NotChecked=0, Total=20880 [2022-11-23 15:21:59,480 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 556 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:59,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 155 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:21:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-23 15:21:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 237. [2022-11-23 15:21:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.1063829787234043) internal successors, (260), 236 states have internal predecessors, (260), 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) [2022-11-23 15:21:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 260 transitions. [2022-11-23 15:21:59,494 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 260 transitions. Word has length 115 [2022-11-23 15:21:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:59,494 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 260 transitions. [2022-11-23 15:21:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4623655913978495) internal successors, (229), 94 states have internal predecessors, (229), 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) [2022-11-23 15:21:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 260 transitions. [2022-11-23 15:21:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 15:21:59,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:59,497 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 1, 1, 1] [2022-11-23 15:21:59,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:59,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:21:59,704 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:21:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash -47287054, now seen corresponding path program 4 times [2022-11-23 15:21:59,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:59,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650506539] [2022-11-23 15:21:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 1265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:01,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650506539] [2022-11-23 15:22:01,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650506539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:01,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029700246] [2022-11-23 15:22:01,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:22:01,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:01,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:01,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:22:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 15:22:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 1265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:01,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 1265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:03,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029700246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:03,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145804378] [2022-11-23 15:22:03,520 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:22:03,520 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:03,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:03,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:03,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:03,670 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:22:04,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4822#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:22:04,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:22:04,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:22:04,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-23 15:22:04,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479135344] [2022-11-23 15:22:04,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:04,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-23 15:22:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-23 15:22:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2266, Invalid=7436, Unknown=0, NotChecked=0, Total=9702 [2022-11-23 15:22:04,957 INFO L87 Difference]: Start difference. First operand 237 states and 260 transitions. Second operand has 94 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 94 states have internal predecessors, (233), 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) [2022-11-23 15:22:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:06,857 INFO L93 Difference]: Finished difference Result 240 states and 263 transitions. [2022-11-23 15:22:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-23 15:22:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 94 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-23 15:22:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:06,859 INFO L225 Difference]: With dead ends: 240 [2022-11-23 15:22:06,859 INFO L226 Difference]: Without dead ends: 239 [2022-11-23 15:22:06,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 276 SyntacticMatches, 23 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7758 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5555, Invalid=15325, Unknown=0, NotChecked=0, Total=20880 [2022-11-23 15:22:06,862 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 286 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:06,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 128 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:22:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-23 15:22:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-11-23 15:22:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 238 states have internal predecessors, (239), 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) [2022-11-23 15:22:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2022-11-23 15:22:06,879 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 117 [2022-11-23 15:22:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:06,880 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2022-11-23 15:22:06,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.5053763440860215) internal successors, (233), 94 states have internal predecessors, (233), 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) [2022-11-23 15:22:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2022-11-23 15:22:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-23 15:22:06,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:06,885 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1] [2022-11-23 15:22:06,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:07,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:22:07,091 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:22:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1046385520, now seen corresponding path program 5 times [2022-11-23 15:22:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:07,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575883150] [2022-11-23 15:22:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:12,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575883150] [2022-11-23 15:22:12,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575883150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354624097] [2022-11-23 15:22:12,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:22:12,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:12,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:12,261 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:12,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:22:12,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-23 15:22:12,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:22:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 15:22:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:13,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 5313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354624097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013208561] [2022-11-23 15:22:20,577 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:22:20,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:20,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:20,577 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:20,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:20,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:22:24,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7086#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:22:24,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:22:24,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:22:24,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-23 15:22:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712470277] [2022-11-23 15:22:24,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-23 15:22:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:24,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-23 15:22:24,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9130, Invalid=28700, Unknown=0, NotChecked=0, Total=37830 [2022-11-23 15:22:24,334 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 190 states, 189 states have (on average 2.4814814814814814) internal successors, (469), 190 states have internal predecessors, (469), 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) [2022-11-23 15:22:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:31,464 INFO L93 Difference]: Finished difference Result 525 states and 572 transitions. [2022-11-23 15:22:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-23 15:22:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.4814814814814814) internal successors, (469), 190 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2022-11-23 15:22:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:31,468 INFO L225 Difference]: With dead ends: 525 [2022-11-23 15:22:31,468 INFO L226 Difference]: Without dead ends: 524 [2022-11-23 15:22:31,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 559 SyntacticMatches, 46 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31431 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=22619, Invalid=60613, Unknown=0, NotChecked=0, Total=83232 [2022-11-23 15:22:31,475 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1103 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:31,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 273 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:22:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-23 15:22:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 477. [2022-11-23 15:22:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.1031578947368421) internal successors, (524), 476 states have internal predecessors, (524), 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) [2022-11-23 15:22:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 524 transitions. [2022-11-23 15:22:31,494 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 524 transitions. Word has length 235 [2022-11-23 15:22:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:31,495 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 524 transitions. [2022-11-23 15:22:31,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.4814814814814814) internal successors, (469), 190 states have internal predecessors, (469), 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) [2022-11-23 15:22:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 524 transitions. [2022-11-23 15:22:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-23 15:22:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:31,500 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 46, 1, 1, 1] [2022-11-23 15:22:31,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:31,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:22:31,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:22:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash 554139122, now seen corresponding path program 5 times [2022-11-23 15:22:31,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:31,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535564397] [2022-11-23 15:22:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:31,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 5405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:36,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535564397] [2022-11-23 15:22:36,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535564397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124059524] [2022-11-23 15:22:36,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:22:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:36,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:22:37,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-23 15:22:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:22:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 15:22:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 5405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:37,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 5405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:22:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124059524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148188264] [2022-11-23 15:22:45,182 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:22:45,182 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:45,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:45,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:45,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:45,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:22:49,139 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10077#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:22:49,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:22:49,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:22:49,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-23 15:22:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408959148] [2022-11-23 15:22:49,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:49,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-23 15:22:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-23 15:22:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9130, Invalid=28700, Unknown=0, NotChecked=0, Total=37830 [2022-11-23 15:22:49,143 INFO L87 Difference]: Start difference. First operand 477 states and 524 transitions. Second operand has 190 states, 189 states have (on average 2.502645502645503) internal successors, (473), 190 states have internal predecessors, (473), 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) [2022-11-23 15:22:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:56,071 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2022-11-23 15:22:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-23 15:22:56,072 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.502645502645503) internal successors, (473), 190 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-23 15:22:56,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:56,074 INFO L225 Difference]: With dead ends: 480 [2022-11-23 15:22:56,074 INFO L226 Difference]: Without dead ends: 479 [2022-11-23 15:22:56,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 564 SyntacticMatches, 47 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31662 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=22619, Invalid=60613, Unknown=0, NotChecked=0, Total=83232 [2022-11-23 15:22:56,081 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 712 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:56,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 226 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:22:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-23 15:22:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2022-11-23 15:22:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 477 states have (on average 1.0041928721174005) internal successors, (479), 478 states have internal predecessors, (479), 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) [2022-11-23 15:22:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2022-11-23 15:22:56,105 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 237 [2022-11-23 15:22:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:56,106 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2022-11-23 15:22:56,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.502645502645503) internal successors, (473), 190 states have internal predecessors, (473), 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) [2022-11-23 15:22:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2022-11-23 15:22:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-11-23 15:22:56,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:56,118 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 1, 1, 1] [2022-11-23 15:22:56,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:56,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:22:56,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:22:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1153967472, now seen corresponding path program 6 times [2022-11-23 15:22:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:56,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593827972] [2022-11-23 15:22:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:23:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:23:16,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:23:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593827972] [2022-11-23 15:23:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593827972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:23:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213399889] [2022-11-23 15:23:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:23:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:23:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:23:16,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:23:16,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:23:16,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:23:16,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:23:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 15:23:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:23:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:23:17,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:23:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22137 backedges. 0 proven. 22137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:23:47,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213399889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:23:47,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128567634] [2022-11-23 15:23:47,617 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:23:47,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:23:47,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:23:47,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:23:47,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:23:47,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:24:00,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14645#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:24:00,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:24:00,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:24:00,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-23 15:24:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698920423] [2022-11-23 15:24:00,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:24:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-23 15:24:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:00,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-23 15:24:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36682, Invalid=112700, Unknown=0, NotChecked=0, Total=149382 [2022-11-23 15:24:00,100 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand has 382 states, 381 states have (on average 2.490813648293963) internal successors, (949), 382 states have internal predecessors, (949), 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) [2022-11-23 15:24:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:32,569 INFO L93 Difference]: Finished difference Result 1053 states and 1148 transitions. [2022-11-23 15:24:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-11-23 15:24:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.490813648293963) internal successors, (949), 382 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 475 [2022-11-23 15:24:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:32,583 INFO L225 Difference]: With dead ends: 1053 [2022-11-23 15:24:32,584 INFO L226 Difference]: Without dead ends: 1052 [2022-11-23 15:24:32,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1804 GetRequests, 1135 SyntacticMatches, 94 SemanticMatches, 575 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127383 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=91307, Invalid=241045, Unknown=0, NotChecked=0, Total=332352 [2022-11-23 15:24:32,599 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2691 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:32,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2691 Valid, 524 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:24:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-23 15:24:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 957. [2022-11-23 15:24:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 955 states have (on average 1.1015706806282723) internal successors, (1052), 956 states have internal predecessors, (1052), 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) [2022-11-23 15:24:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1052 transitions. [2022-11-23 15:24:32,630 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1052 transitions. Word has length 475 [2022-11-23 15:24:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:32,631 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1052 transitions. [2022-11-23 15:24:32,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.490813648293963) internal successors, (949), 382 states have internal predecessors, (949), 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) [2022-11-23 15:24:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1052 transitions. [2022-11-23 15:24:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-11-23 15:24:32,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:32,642 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 94, 1, 1, 1] [2022-11-23 15:24:32,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:24:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:24:32,850 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:24:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash 861179890, now seen corresponding path program 6 times [2022-11-23 15:24:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:32,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563324954] [2022-11-23 15:24:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:32,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22325 backedges. 0 proven. 22325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:52,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563324954] [2022-11-23 15:24:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563324954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:24:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005869303] [2022-11-23 15:24:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:24:52,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:24:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:52,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:24:52,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:24:52,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:24:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:24:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-23 15:24:52,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:24:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22325 backedges. 0 proven. 22325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:53,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22325 backedges. 0 proven. 22325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:22,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005869303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:22,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962550863] [2022-11-23 15:25:22,903 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:25:22,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:22,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:22,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:22,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:23,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:35,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20660#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:35,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:35,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:35,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-23 15:25:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101816518] [2022-11-23 15:25:35,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-23 15:25:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:35,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-23 15:25:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36682, Invalid=112700, Unknown=0, NotChecked=0, Total=149382 [2022-11-23 15:25:35,384 INFO L87 Difference]: Start difference. First operand 957 states and 1052 transitions. Second operand has 382 states, 381 states have (on average 2.5013123359580054) internal successors, (953), 382 states have internal predecessors, (953), 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) [2022-11-23 15:26:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:07,374 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2022-11-23 15:26:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-11-23 15:26:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.5013123359580054) internal successors, (953), 382 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2022-11-23 15:26:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:07,378 INFO L225 Difference]: With dead ends: 960 [2022-11-23 15:26:07,378 INFO L226 Difference]: Without dead ends: 959 [2022-11-23 15:26:07,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1140 SyntacticMatches, 95 SemanticMatches, 575 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127854 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=91307, Invalid=241045, Unknown=0, NotChecked=0, Total=332352 [2022-11-23 15:26:07,397 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1478 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:07,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 436 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:26:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-23 15:26:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2022-11-23 15:26:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 957 states have (on average 1.0020898641588296) internal successors, (959), 958 states have internal predecessors, (959), 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) [2022-11-23 15:26:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 959 transitions. [2022-11-23 15:26:07,429 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 959 transitions. Word has length 477 [2022-11-23 15:26:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 959 states and 959 transitions. [2022-11-23 15:26:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.5013123359580054) internal successors, (953), 382 states have internal predecessors, (953), 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) [2022-11-23 15:26:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 959 transitions. [2022-11-23 15:26:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-11-23 15:26:07,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:07,440 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 190, 190, 190, 1, 1, 1] [2022-11-23 15:26:07,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:26:07,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:26:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash 587680112, now seen corresponding path program 7 times [2022-11-23 15:26:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:07,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689327189] [2022-11-23 15:26:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:42,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689327189] [2022-11-23 15:27:42,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689327189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668784765] [2022-11-23 15:27:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:27:42,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:42,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:42,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:27:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:43,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-23 15:27:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:44,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 90345 backedges. 0 proven. 90345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:29:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668784765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256814228] [2022-11-23 15:29:40,936 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:29:40,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:29:40,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:29:40,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:29:40,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:29:41,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:30:26,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29836#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:30:26,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:30:26,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:30:26,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-23 15:30:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689295179] [2022-11-23 15:30:26,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:30:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-23 15:30:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:30:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-23 15:30:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147082, Invalid=446588, Unknown=0, NotChecked=0, Total=593670 [2022-11-23 15:30:26,549 INFO L87 Difference]: Start difference. First operand 959 states and 959 transitions. Second operand has 766 states, 765 states have (on average 2.495424836601307) internal successors, (1909), 766 states have internal predecessors, (1909), 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) [2022-11-23 15:34:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:09,303 INFO L93 Difference]: Finished difference Result 2109 states and 2300 transitions. [2022-11-23 15:34:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 766 states. [2022-11-23 15:34:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.495424836601307) internal successors, (1909), 766 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 955 [2022-11-23 15:34:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:09,310 INFO L225 Difference]: With dead ends: 2109 [2022-11-23 15:34:09,311 INFO L226 Difference]: Without dead ends: 2108 [2022-11-23 15:34:09,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3628 GetRequests, 2287 SyntacticMatches, 190 SemanticMatches, 1151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512823 ImplicationChecksByTransitivity, 286.5s TimeCoverageRelationStatistics Valid=366923, Invalid=961333, Unknown=0, NotChecked=0, Total=1328256 [2022-11-23 15:34:09,548 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6351 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6351 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:09,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6351 Valid, 1014 Invalid, 2149 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 15:34:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-11-23 15:34:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1917. [2022-11-23 15:34:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1915 states have (on average 1.1007832898172323) internal successors, (2108), 1916 states have internal predecessors, (2108), 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) [2022-11-23 15:34:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2108 transitions. [2022-11-23 15:34:09,604 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2108 transitions. Word has length 955 [2022-11-23 15:34:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:09,606 INFO L495 AbstractCegarLoop]: Abstraction has 1917 states and 2108 transitions. [2022-11-23 15:34:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.495424836601307) internal successors, (1909), 766 states have internal predecessors, (1909), 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) [2022-11-23 15:34:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2108 transitions. [2022-11-23 15:34:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-23 15:34:09,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:09,616 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 190, 1, 1, 1] [2022-11-23 15:34:09,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_234c583e-5c6c-408b-b615-fb173d5fbe75/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:09,827 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:34:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2119873522, now seen corresponding path program 7 times [2022-11-23 15:34:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:09,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037850860] [2022-11-23 15:34:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat