./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bb6780cd72c063a3ddf598e6503fa6a629155476e6b8e08224a0e59d0bc00b9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:13:39,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:13:39,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:13:39,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:13:39,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:13:39,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:13:39,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:13:39,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:13:39,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:13:39,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:13:39,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:13:39,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:13:39,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:13:39,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:13:39,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:13:39,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:13:39,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:13:39,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:13:39,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:13:39,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:13:39,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:13:39,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:13:39,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:13:39,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:13:39,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:13:39,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:13:39,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:13:39,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:13:39,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:13:39,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:13:39,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:13:39,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:13:39,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:13:39,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:13:39,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:13:39,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:13:39,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:13:39,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:13:39,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:13:39,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:13:39,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:13:39,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:13:39,612 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:13:39,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:13:39,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:13:39,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:13:39,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:13:39,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:13:39,624 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:13:39,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:13:39,625 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:13:39,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:13:39,625 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:13:39,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:13:39,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:13:39,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:13:39,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:13:39,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:13:39,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:13:39,628 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:13:39,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:13:39,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:13:39,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:13:39,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:13:39,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:13:39,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:13:39,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:13:39,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:13:39,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:13:39,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:13:39,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:13:39,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:13:39,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:13:39,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:13:39,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:13:39,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:13:39,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:13:39,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:13:39,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:13:39,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:13:39,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:13:39,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:13:39,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:13:39,641 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bb6780cd72c063a3ddf598e6503fa6a629155476e6b8e08224a0e59d0bc00b9 [2021-11-23 02:13:39,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:13:39,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:13:39,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:13:39,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:13:39,997 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:13:39,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c [2021-11-23 02:13:40,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/data/2ded34678/441239c5999f42db99947da94ed4cfde/FLAG33dd209d6 [2021-11-23 02:13:40,532 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:13:40,532 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c [2021-11-23 02:13:40,540 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/data/2ded34678/441239c5999f42db99947da94ed4cfde/FLAG33dd209d6 [2021-11-23 02:13:40,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/data/2ded34678/441239c5999f42db99947da94ed4cfde [2021-11-23 02:13:40,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:13:40,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:13:40,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:13:40,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:13:40,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:13:40,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:40" (1/1) ... [2021-11-23 02:13:40,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a69791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:40, skipping insertion in model container [2021-11-23 02:13:40,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:40" (1/1) ... [2021-11-23 02:13:40,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:13:40,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:13:41,172 WARN L230 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_1af08888-3209-4c39-bd49-b691aab35071/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c[538,551] [2021-11-23 02:13:41,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:13:41,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:13:41,232 WARN L230 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_1af08888-3209-4c39-bd49-b691aab35071/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound1.c[538,551] [2021-11-23 02:13:41,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:13:41,255 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:13:41,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41 WrapperNode [2021-11-23 02:13:41,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:13:41,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:13:41,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:13:41,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:13:41,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,292 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2021-11-23 02:13:41,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:13:41,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:13:41,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:13:41,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:13:41,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:13:41,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:13:41,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:13:41,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:13:41,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (1/1) ... [2021-11-23 02:13:41,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:13:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:41,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:13:41,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:13:41,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:13:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:13:41,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:13:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:13:41,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:13:41,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:13:41,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:13:41,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:13:41,462 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:13:41,463 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:13:41,581 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:13:41,618 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:13:41,618 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:13:41,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:41 BoogieIcfgContainer [2021-11-23 02:13:41,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:13:41,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:13:41,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:13:41,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:13:41,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:13:40" (1/3) ... [2021-11-23 02:13:41,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a17155a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:41, skipping insertion in model container [2021-11-23 02:13:41,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:41" (2/3) ... [2021-11-23 02:13:41,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a17155a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:13:41, skipping insertion in model container [2021-11-23 02:13:41,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:41" (3/3) ... [2021-11-23 02:13:41,634 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.c [2021-11-23 02:13:41,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:13:41,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:13:41,693 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:13:41,701 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:13:41,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:13:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:13:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:13:41,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:41,727 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:41,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2021-11-23 02:13:41,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:41,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905885175] [2021-11-23 02:13:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:41,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:13:41,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:41,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905885175] [2021-11-23 02:13:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905885175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:41,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:41,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:13:41,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586725120] [2021-11-23 02:13:41,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:41,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:41,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:42,011 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:13:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:42,115 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2021-11-23 02:13:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:13:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2021-11-23 02:13:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:42,127 INFO L225 Difference]: With dead ends: 58 [2021-11-23 02:13:42,127 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 02:13:42,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:13:42,136 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:42,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 114 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:13:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 02:13:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-11-23 02:13:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:13:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-11-23 02:13:42,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2021-11-23 02:13:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:42,189 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-11-23 02:13:42,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:13:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-11-23 02:13:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:13:42,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:42,192 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:42,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:13:42,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2021-11-23 02:13:42,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627414825] [2021-11-23 02:13:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:42,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:13:42,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627414825] [2021-11-23 02:13:42,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627414825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:42,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:42,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:13:42,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078272525] [2021-11-23 02:13:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:42,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:42,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:42,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:42,314 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:13:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:42,388 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-11-23 02:13:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:13:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2021-11-23 02:13:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:42,391 INFO L225 Difference]: With dead ends: 41 [2021-11-23 02:13:42,391 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 02:13:42,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:13:42,395 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:42,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 107 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:13:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 02:13:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-23 02:13:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 02:13:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-23 02:13:42,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2021-11-23 02:13:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:42,409 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-23 02:13:42,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:13:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-23 02:13:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:13:42,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:42,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:42,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:13:42,412 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2021-11-23 02:13:42,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:42,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97976610] [2021-11-23 02:13:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:42,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:42,435 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:13:42,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627774040] [2021-11-23 02:13:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:42,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:42,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:42,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:42,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:13:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:13:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:13:43,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:13:43,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97976610] [2021-11-23 02:13:43,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:13:43,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627774040] [2021-11-23 02:13:43,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627774040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:43,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:43,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:13:43,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020228423] [2021-11-23 02:13:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:13:43,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:13:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:13:43,151 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:13:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:43,340 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-11-23 02:13:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:13:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2021-11-23 02:13:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:43,346 INFO L225 Difference]: With dead ends: 60 [2021-11-23 02:13:43,346 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 02:13:43,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:13:43,352 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:43,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 118 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:13:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 02:13:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 02:13:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 02:13:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-11-23 02:13:43,387 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 27 [2021-11-23 02:13:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-11-23 02:13:43,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:13:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-11-23 02:13:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:13:43,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:43,390 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:43,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:43,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:43,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1046956766, now seen corresponding path program 1 times [2021-11-23 02:13:43,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252326406] [2021-11-23 02:13:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:43,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:43,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:13:43,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156916000] [2021-11-23 02:13:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:43,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:43,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:43,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:43,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:13:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:43,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:13:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:13:44,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:13:44,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252326406] [2021-11-23 02:13:44,322 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:13:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156916000] [2021-11-23 02:13:44,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156916000] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:13:44,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:13:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-11-23 02:13:44,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956291957] [2021-11-23 02:13:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:44,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:13:44,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:13:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:13:44,324 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:13:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:44,423 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2021-11-23 02:13:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:13:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2021-11-23 02:13:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:44,425 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:13:44,425 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:13:44,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:13:44,427 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:44,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:13:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:13:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-11-23 02:13:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:13:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-23 02:13:44,440 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2021-11-23 02:13:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:44,441 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-23 02:13:44,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:13:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-23 02:13:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:13:44,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:44,444 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:44,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:44,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:44,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2021-11-23 02:13:44,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:44,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035142853] [2021-11-23 02:13:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:44,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:44,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:13:44,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637348358] [2021-11-23 02:13:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:44,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:44,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:44,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:13:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:13:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-23 02:13:45,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:13:45,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035142853] [2021-11-23 02:13:45,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:13:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637348358] [2021-11-23 02:13:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637348358] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:13:45,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:13:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-23 02:13:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126598587] [2021-11-23 02:13:45,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:45,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:45,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:13:45,359 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:13:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:45,452 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-11-23 02:13:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:13:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-11-23 02:13:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:45,455 INFO L225 Difference]: With dead ends: 63 [2021-11-23 02:13:45,455 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 02:13:45,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:13:45,457 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:45,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:13:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 02:13:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-23 02:13:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-23 02:13:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-23 02:13:45,470 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 44 [2021-11-23 02:13:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-23 02:13:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:13:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-23 02:13:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:13:45,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:45,473 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:45,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:45,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:45,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash 15172884, now seen corresponding path program 1 times [2021-11-23 02:13:45,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:45,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726187098] [2021-11-23 02:13:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:45,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:45,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:13:45,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595051114] [2021-11-23 02:13:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:45,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:45,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:45,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:13:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:13:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:13:45,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:13:45,911 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:13:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726187098] [2021-11-23 02:13:45,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:13:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595051114] [2021-11-23 02:13:45,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595051114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:45,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:13:45,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:13:45,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709898122] [2021-11-23 02:13:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:45,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:13:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:13:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:13:45,914 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:13:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:45,988 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-11-23 02:13:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:13:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-23 02:13:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:45,993 INFO L225 Difference]: With dead ends: 67 [2021-11-23 02:13:45,994 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 02:13:45,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:13:45,998 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:45,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:13:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 02:13:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-23 02:13:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 02:13:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-23 02:13:46,029 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 45 [2021-11-23 02:13:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:46,029 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-23 02:13:46,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:13:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-23 02:13:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:13:46,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:46,040 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:46,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:46,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:13:46,256 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:13:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 166119996, now seen corresponding path program 1 times [2021-11-23 02:13:46,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:13:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208452401] [2021-11-23 02:13:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:46,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:13:46,265 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:13:46,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439248291] [2021-11-23 02:13:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:46,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:46,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:46,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:46,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:13:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:13:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 38 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-23 02:13:47,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:28,479 WARN L227 SmtUtils]: Spent 20.00s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:15:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-23 02:15:28,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208452401] [2021-11-23 02:15:28,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:15:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439248291] [2021-11-23 02:15:28,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439248291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:28,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1122960333] [2021-11-23 02:15:28,161 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-23 02:15:28,162 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:28,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:28,172 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:28,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:35,733 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-23 02:15:35,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 02:15:35,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:40,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2063#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:15:40,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:40,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:15:40,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-11-23 02:15:40,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126596885] [2021-11-23 02:15:40,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:40,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:15:40,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:15:40,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=696, Unknown=1, NotChecked=0, Total=812 [2021-11-23 02:15:40,755 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-23 02:16:15,219 WARN L227 SmtUtils]: Spent 30.97s on a formula simplification. DAG size of input: 65 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:16:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:19,668 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2021-11-23 02:16:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:16:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 63 [2021-11-23 02:16:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:19,672 INFO L225 Difference]: With dead ends: 114 [2021-11-23 02:16:19,672 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 02:16:19,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 141 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=185, Invalid=1074, Unknown=1, NotChecked=0, Total=1260 [2021-11-23 02:16:19,675 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:19,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 192 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 02:16:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 02:16:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2021-11-23 02:16:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-23 02:16:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-11-23 02:16:19,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 63 [2021-11-23 02:16:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-11-23 02:16:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-23 02:16:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-11-23 02:16:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:16:19,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:19,703 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:19,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:16:19,904 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1699758119, now seen corresponding path program 2 times [2021-11-23 02:16:19,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:19,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227670886] [2021-11-23 02:16:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:19,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:19,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:16:19,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668272399] [2021-11-23 02:16:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:16:19,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:19,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:19,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:16:19,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:16:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:16:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:16:19,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 02:16:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 02:16:23,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:23,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227670886] [2021-11-23 02:16:23,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:16:23,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668272399] [2021-11-23 02:16:23,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668272399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:23,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683384985] [2021-11-23 02:16:23,019 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-23 02:16:23,019 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:23,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:23,020 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:23,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:27,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2021-11-23 02:16:27,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 02:16:27,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:29,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2806#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:16:29,615 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:29,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:16:29,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2021-11-23 02:16:29,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489439960] [2021-11-23 02:16:29,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:29,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:16:29,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:16:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:16:29,618 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-23 02:16:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:30,166 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-11-23 02:16:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:16:30,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 68 [2021-11-23 02:16:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:30,170 INFO L225 Difference]: With dead ends: 114 [2021-11-23 02:16:30,170 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 02:16:30,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:16:30,172 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:30,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 199 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 02:16:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 02:16:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0) internal successors, (36), 36 states have internal predecessors, (36), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-23 02:16:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-11-23 02:16:30,184 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 68 [2021-11-23 02:16:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:30,185 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-11-23 02:16:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2021-11-23 02:16:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-11-23 02:16:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:16:30,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:30,188 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:30,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:30,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:30,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1987386298, now seen corresponding path program 1 times [2021-11-23 02:16:30,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:30,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059421170] [2021-11-23 02:16:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:30,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:30,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:16:30,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929740347] [2021-11-23 02:16:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:30,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:30,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:30,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:30,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:16:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:16:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 67 proven. 12 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 02:16:33,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 02:16:34,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059421170] [2021-11-23 02:16:34,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:16:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929740347] [2021-11-23 02:16:34,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929740347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724713575] [2021-11-23 02:16:34,078 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 02:16:34,079 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:34,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:34,079 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:34,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:38,939 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2021-11-23 02:16:38,947 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2021-11-23 02:16:38,949 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:40,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3527#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:16:40,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:40,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:16:40,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2021-11-23 02:16:40,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106473854] [2021-11-23 02:16:40,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:40,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:16:40,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:16:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:16:40,506 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 19 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-23 02:16:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:41,005 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-11-23 02:16:41,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:16:41,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 74 [2021-11-23 02:16:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:41,006 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:16:41,006 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:16:41,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 170 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:16:41,008 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:41,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 179 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:16:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:16:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:16:41,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-11-23 02:16:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:41,011 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:16:41,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2021-11-23 02:16:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:16:41,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:16:41,014 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:16:41,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:41,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:16:43,043 INFO L854 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse0) (<= 1 .cse0))) [2021-11-23 02:16:43,043 INFO L858 garLoopResultBuilder]: For program point L48(lines 46 58) no Hoare annotation was computed. [2021-11-23 02:16:43,043 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 44) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse1 (<= 1 .cse0)) (.cse2 (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|))) (or (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse0) .cse1 .cse2 .cse3 .cse4) (and .cse1 (<= .cse0 |ULTIMATE.start_main_~r~0#1|) .cse2 (= 2 |ULTIMATE.start_main_~p~0#1|) (= (* 2 .cse0) |ULTIMATE.start_main_~d~0#1|) .cse3 .cse4)))) [2021-11-23 02:16:43,043 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 02:16:43,043 INFO L861 garLoopResultBuilder]: At program point L61(line 61) the Hoare annotation is: true [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1) [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (and (<= (mod |ULTIMATE.start_main_~B~0#1| 4294967296) 1) (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1)) [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse1 (<= 1 .cse0)) (.cse2 (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|))) (or (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse0) .cse1 .cse2 .cse3 .cse4) (and .cse1 (<= .cse0 |ULTIMATE.start_main_~r~0#1|) .cse2 (= 2 |ULTIMATE.start_main_~p~0#1|) (= (* 2 .cse0) |ULTIMATE.start_main_~d~0#1|) .cse3 .cse4)))) [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse1 (<= 1 .cse0)) (.cse2 (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|))) (or (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse0) .cse1 .cse2 .cse3 .cse4) (and .cse1 (<= .cse0 |ULTIMATE.start_main_~r~0#1|) .cse2 (= 2 |ULTIMATE.start_main_~p~0#1|) (= (* 2 .cse0) |ULTIMATE.start_main_~d~0#1|) .cse3 .cse4)))) [2021-11-23 02:16:43,044 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 02:16:43,044 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-11-23 02:16:43,044 INFO L858 garLoopResultBuilder]: For program point L54-2(lines 22 63) no Hoare annotation was computed. [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L46-1(lines 46 58) the Hoare annotation is: (let ((.cse3 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse0 (= |ULTIMATE.start_main_~d~0#1| .cse3)) (.cse1 (<= 1 .cse3)) (.cse2 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (or (and .cse0 .cse1 (<= .cse2 1) (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= .cse2 (+ |ULTIMATE.start_main_~r~0#1| (* .cse3 |ULTIMATE.start_main_~q~0#1|))) (= (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) .cse2) (<= .cse3 .cse2)) (and (<= .cse3 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| .cse2))))) [2021-11-23 02:16:43,044 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse1 (<= 1 .cse0)) (.cse2 (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 1)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= (+ (* 4294967296 (div |ULTIMATE.start_main_~A~0#1| 4294967296)) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|))) (or (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse0) .cse1 .cse2 .cse3 .cse4) (and .cse1 (<= .cse0 |ULTIMATE.start_main_~r~0#1|) .cse2 (= 2 |ULTIMATE.start_main_~p~0#1|) (= (* 2 .cse0) |ULTIMATE.start_main_~d~0#1|) .cse3 .cse4)))) [2021-11-23 02:16:43,044 INFO L861 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse6 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse1 (<= .cse6 1)) (.cse2 (* 2 .cse0)) (.cse5 (= |ULTIMATE.start_main_~d~0#1| .cse0)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~r~0#1| .cse6))) (or (and (<= .cse0 |ULTIMATE.start_main_~r~0#1|) .cse1 (= 2 |ULTIMATE.start_main_~p~0#1|) (= .cse2 |ULTIMATE.start_main_~d~0#1|) .cse3 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|) .cse4) (and .cse5 .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (< .cse6 .cse2) (= (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) .cse6) (<= .cse0 .cse6)) (and (<= .cse0 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse5 (<= 1 .cse0) .cse3 .cse4)))) [2021-11-23 02:16:43,045 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse2 (mod |ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse3 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse4 (* 2 .cse3)) (.cse0 (<= .cse3 1)) (.cse1 (<= 1 .cse3)) (.cse5 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~r~0#1| .cse2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= .cse2 (+ |ULTIMATE.start_main_~r~0#1| (* .cse3 |ULTIMATE.start_main_~q~0#1|))) (= |ULTIMATE.start_main_~q~0#1| 1) (< .cse2 .cse4) (= (+ |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~r~0#1|) .cse2) (<= .cse3 .cse2)) (and .cse0 .cse1 (<= .cse3 |ULTIMATE.start_main_~r~0#1|) (= 2 |ULTIMATE.start_main_~p~0#1|) (= .cse4 |ULTIMATE.start_main_~d~0#1|) .cse5 (< |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~d~0#1|) .cse6) (and .cse0 (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~d~0#1| .cse3) .cse1 .cse5 .cse6)))) [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point L39(lines 36 44) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-11-23 02:16:43,045 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-11-23 02:16:43,048 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:43,049 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:16:43,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:16:43 BoogieIcfgContainer [2021-11-23 02:16:43,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:16:43,064 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:16:43,064 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:16:43,064 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:16:43,065 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:13:41" (3/4) ... [2021-11-23 02:16:43,067 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 02:16:43,072 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-23 02:16:43,072 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-23 02:16:43,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-23 02:16:43,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 02:16:43,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-23 02:16:43,077 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:16:43,121 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:16:43,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:16:43,125 INFO L158 Benchmark]: Toolchain (without parser) took 182186.37ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 72.6MB in the beginning and 128.5MB in the end (delta: -55.9MB). Peak memory consumption was 125.5MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,125 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory was 90.1MB in the beginning and 90.0MB in the end (delta: 90.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:16:43,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.15ms. Allocated memory is still 111.1MB. Free memory was 72.4MB in the beginning and 86.9MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.79ms. Allocated memory is still 111.1MB. Free memory was 86.9MB in the beginning and 85.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,127 INFO L158 Benchmark]: Boogie Preprocessor took 24.23ms. Allocated memory is still 111.1MB. Free memory was 85.3MB in the beginning and 84.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,127 INFO L158 Benchmark]: RCFGBuilder took 306.08ms. Allocated memory is still 111.1MB. Free memory was 84.2MB in the beginning and 73.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,127 INFO L158 Benchmark]: TraceAbstraction took 181437.55ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 72.8MB in the beginning and 131.6MB in the end (delta: -58.8MB). Peak memory consumption was 125.9MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,128 INFO L158 Benchmark]: Witness Printer took 60.43ms. Allocated memory is still 293.6MB. Free memory was 131.6MB in the beginning and 128.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:16:43,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory was 90.1MB in the beginning and 90.0MB in the end (delta: 90.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.15ms. Allocated memory is still 111.1MB. Free memory was 72.4MB in the beginning and 86.9MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.79ms. Allocated memory is still 111.1MB. Free memory was 86.9MB in the beginning and 85.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.23ms. Allocated memory is still 111.1MB. Free memory was 85.3MB in the beginning and 84.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 306.08ms. Allocated memory is still 111.1MB. Free memory was 84.2MB in the beginning and 73.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 181437.55ms. Allocated memory was 111.1MB in the beginning and 293.6MB in the end (delta: 182.5MB). Free memory was 72.8MB in the beginning and 131.6MB in the end (delta: -58.8MB). Peak memory consumption was 125.9MB. Max. memory is 16.1GB. * Witness Printer took 60.43ms. Allocated memory is still 293.6MB. Free memory was 131.6MB in the beginning and 128.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 181.4s, OverallIterations: 9, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 40.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 226 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 188 mSDsluCounter, 1233 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1047 mSDsCounter, 256 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 949 IncrementalHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 256 mSolverCounterUnsat, 257 mSDtfsCounter, 949 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 859 GetRequests, 669 SyntacticMatches, 58 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 72.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=7, InterpolantAutomatonStates: 74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 28 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 57 PreInvPairs, 77 NumberOfFragments, 627 HoareAnnotationTreeSize, 57 FomulaSimplifications, 20 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 2477 FormulaSimplificationTreeSizeReductionInter, 1.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 110.5s InterpolantComputationTime, 394 NumberOfCodeBlocks, 367 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 663 ConstructedInterpolants, 0 QuantifiedInterpolants, 5673 SizeOfPredicates, 31 NumberOfNonLiveVariables, 873 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 1250/1316 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((B % 4294967296 <= 1 && p == 1) && d == B % 4294967296) && 1 <= B % 4294967296) && A % 4294967296 <= 1) && q == 0) && 4294967296 * (A / 4294967296) + r == A) || ((((((1 <= B % 4294967296 && B % 4294967296 <= r) && A % 4294967296 <= 1) && 2 == p) && 2 * (B % 4294967296) == d) && q == 0) && 4294967296 * (A / 4294967296) + r == A) RESULT: Ultimate proved your program to be correct! [2021-11-23 02:16:43,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1af08888-3209-4c39-bd49-b691aab35071/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE