./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:15:05,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:15:05,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:15:05,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:15:05,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:15:05,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:15:05,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:15:05,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:15:05,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:15:05,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:15:05,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:15:05,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:15:05,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:15:05,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:15:05,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:15:05,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:15:05,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:15:05,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:15:05,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:15:05,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:15:05,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:15:05,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:15:05,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:15:05,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:15:05,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:15:05,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:15:05,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:15:05,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:15:05,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:15:05,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:15:05,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:15:05,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:15:05,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:15:05,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:15:05,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:15:05,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:15:05,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:15:05,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:15:05,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:15:05,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:15:05,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:15:05,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:15:05,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:15:05,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:15:05,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:15:05,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:15:05,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:15:05,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:15:05,655 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:15:05,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:15:05,656 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:15:05,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:15:05,656 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:15:05,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:15:05,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:15:05,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:15:05,657 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:15:05,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:15:05,658 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:15:05,658 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:15:05,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:15:05,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:15:05,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:15:05,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:15:05,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:15:05,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:15:05,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:15:05,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:15:05,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:15:05,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:15:05,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:15:05,662 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:15:05,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:15:05,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:15:05,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:05,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:15:05,663 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:15:05,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:15:05,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:15:05,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:15:05,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:15:05,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:15:05,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:15:05,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-11-25 23:15:05,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:15:05,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:15:05,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:15:05,983 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:15:05,984 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:15:05,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-11-25 23:15:09,078 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:15:09,254 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:15:09,254 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-11-25 23:15:09,261 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/f58094207/75d866740481498296baa802b598f0a4/FLAGa691c6d9c [2022-11-25 23:15:09,275 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/f58094207/75d866740481498296baa802b598f0a4 [2022-11-25 23:15:09,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:15:09,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:15:09,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:09,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:15:09,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:15:09,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db67a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09, skipping insertion in model container [2022-11-25 23:15:09,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:15:09,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:15:09,459 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-11-25 23:15:09,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:09,483 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:15:09,492 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-11-25 23:15:09,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:09,509 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:15:09,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09 WrapperNode [2022-11-25 23:15:09,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:09,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:09,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:15:09,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:15:09,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,538 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-11-25 23:15:09,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:09,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:15:09,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:15:09,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:15:09,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,557 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:15:09,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:15:09,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:15:09,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:15:09,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (1/1) ... [2022-11-25 23:15:09,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:09,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:15:09,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:15:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:15:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:15:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:15:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:15:09,697 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:15:09,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:15:09,808 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:15:09,867 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:15:09,867 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:15:09,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:09 BoogieIcfgContainer [2022-11-25 23:15:09,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:15:09,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:15:09,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:15:09,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:15:09,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:15:09" (1/3) ... [2022-11-25 23:15:09,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc62bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:09, skipping insertion in model container [2022-11-25 23:15:09,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:09" (2/3) ... [2022-11-25 23:15:09,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cc62bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:09, skipping insertion in model container [2022-11-25 23:15:09,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:09" (3/3) ... [2022-11-25 23:15:09,880 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-11-25 23:15:09,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:15:09,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:15:09,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:15:09,955 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e82da52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:15:09,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:15:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:15:09,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:09,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:15:09,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:09,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:09,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2065991, now seen corresponding path program 1 times [2022-11-25 23:15:09,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:09,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385084163] [2022-11-25 23:15:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:09,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:10,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385084163] [2022-11-25 23:15:10,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385084163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:10,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:10,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:15:10,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341400967] [2022-11-25 23:15:10,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:15:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:15:10,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:15:10,276 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:10,339 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-25 23:15:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:15:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:15:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:10,350 INFO L225 Difference]: With dead ends: 13 [2022-11-25 23:15:10,350 INFO L226 Difference]: Without dead ends: 6 [2022-11-25 23:15:10,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:15:10,367 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:10,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:10,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-25 23:15:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-25 23:15:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-25 23:15:10,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-25 23:15:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:10,413 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-25 23:15:10,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-25 23:15:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:15:10,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:10,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:15:10,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:15:10,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 64150435, now seen corresponding path program 1 times [2022-11-25 23:15:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069988409] [2022-11-25 23:15:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:10,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069988409] [2022-11-25 23:15:10,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069988409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702698942] [2022-11-25 23:15:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:10,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:10,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:10,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:15:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:15:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:10,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702698942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612373641] [2022-11-25 23:15:10,792 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:15:10,792 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:15:10,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:15:10,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:15:10,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:15:11,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:15:11,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (not (< (mod |ULTIMATE.start_main_~c~0#1| 256) 8)) (= (ite (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:15:11,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:15:11,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:15:11,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:15:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201980990] [2022-11-25 23:15:11,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:11,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:15:11,290 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:11,355 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-25 23:15:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:15:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:11,357 INFO L225 Difference]: With dead ends: 12 [2022-11-25 23:15:11,357 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 23:15:11,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:15:11,362 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:11,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 23:15:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 23:15:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-25 23:15:11,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-25 23:15:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:11,373 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-25 23:15:11,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-25 23:15:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:15:11,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:11,374 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 23:15:11,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:15:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:11,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash -50856633, now seen corresponding path program 2 times [2022-11-25 23:15:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:11,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377079469] [2022-11-25 23:15:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:11,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:11,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:15:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377079469] [2022-11-25 23:15:11,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377079469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:15:11,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034206570] [2022-11-25 23:15:11,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:11,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:11,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:11,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:15:12,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:15:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:12,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:15:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:12,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:12,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034206570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960497690] [2022-11-25 23:15:12,259 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-25 23:15:12,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:15:12,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:15:12,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:15:12,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:15:12,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:15:12,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163#(and (not (< (mod |ULTIMATE.start_main_~c~0#1| 256) 8)) (= (ite (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:15:12,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:15:12,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:15:12,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-25 23:15:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318627466] [2022-11-25 23:15:12,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:12,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:15:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:15:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:15:12,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:15:12,629 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:13,038 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-25 23:15:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:15:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:15:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:13,040 INFO L225 Difference]: With dead ends: 18 [2022-11-25 23:15:13,040 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:15:13,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:15:13,041 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:13,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:15:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:15:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-25 23:15:13,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2022-11-25 23:15:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:13,048 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-25 23:15:13,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-25 23:15:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:15:13,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:13,050 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2022-11-25 23:15:13,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:13,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:13,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1522332743, now seen corresponding path program 3 times [2022-11-25 23:15:13,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:15:13,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400592497] [2022-11-25 23:15:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:13,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:15:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:15:13,344 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:15:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:15:13,468 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:15:13,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:15:13,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:15:13,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:15:13,476 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-25 23:15:13,479 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:15:13,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:15:13 BoogieIcfgContainer [2022-11-25 23:15:13,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:15:13,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:15:13,510 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:15:13,510 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:15:13,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:09" (3/4) ... [2022-11-25 23:15:13,515 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 23:15:13,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:15:13,519 INFO L158 Benchmark]: Toolchain (without parser) took 4236.90ms. Allocated memory was 134.2MB in the beginning and 178.3MB in the end (delta: 44.0MB). Free memory was 93.9MB in the beginning and 73.9MB in the end (delta: 20.0MB). Peak memory consumption was 64.9MB. Max. memory is 16.1GB. [2022-11-25 23:15:13,519 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 134.2MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:15:13,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.53ms. Allocated memory is still 134.2MB. Free memory was 93.5MB in the beginning and 83.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:15:13,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.79ms. Allocated memory is still 134.2MB. Free memory was 83.4MB in the beginning and 82.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:15:13,523 INFO L158 Benchmark]: Boogie Preprocessor took 20.98ms. Allocated memory is still 134.2MB. Free memory was 82.2MB in the beginning and 80.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:15:13,525 INFO L158 Benchmark]: RCFGBuilder took 309.95ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 69.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:15:13,526 INFO L158 Benchmark]: TraceAbstraction took 3636.97ms. Allocated memory was 134.2MB in the beginning and 178.3MB in the end (delta: 44.0MB). Free memory was 68.8MB in the beginning and 73.9MB in the end (delta: -5.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-25 23:15:13,526 INFO L158 Benchmark]: Witness Printer took 5.07ms. Allocated memory is still 178.3MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:15:13,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 134.2MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.53ms. Allocated memory is still 134.2MB. Free memory was 93.5MB in the beginning and 83.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.79ms. Allocated memory is still 134.2MB. Free memory was 83.4MB in the beginning and 82.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.98ms. Allocated memory is still 134.2MB. Free memory was 82.2MB in the beginning and 80.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 309.95ms. Allocated memory is still 134.2MB. Free memory was 80.9MB in the beginning and 69.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3636.97ms. Allocated memory was 134.2MB in the beginning and 178.3MB in the end (delta: 44.0MB). Free memory was 68.8MB in the beginning and 73.9MB in the end (delta: -5.1MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 5.07ms. Allocated memory is still 178.3MB. Free memory is still 73.9MB. There was no memory consumed. 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 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, i=255, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, i=0, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, i=0, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, i=0, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, i=255, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, i=1, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, i=255, x=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, i=1, x=2, y=0] [L30] COND FALSE !(c < (unsigned char)8) [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 57 IncrementalHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 7 mSDtfsCounter, 57 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 187 SizeOfPredicates, 3 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 23:15:13,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:15:16,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:15:16,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:15:16,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:15:16,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:15:16,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:15:16,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:15:16,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:15:16,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:15:16,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:15:16,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:15:16,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:15:16,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:15:16,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:15:16,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:15:16,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:15:16,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:15:16,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:15:16,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:15:16,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:15:16,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:15:16,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:15:16,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:15:16,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:15:16,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:15:16,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:15:16,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:15:16,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:15:16,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:15:16,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:15:16,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:15:16,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:15:16,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:15:16,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:15:16,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:15:16,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:15:16,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:15:16,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:15:16,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:15:16,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:15:16,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:15:16,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-25 23:15:16,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:15:16,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:15:16,142 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:15:16,142 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:15:16,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:15:16,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:15:16,144 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:15:16,144 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:15:16,144 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:15:16,145 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:15:16,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:15:16,145 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:15:16,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:15:16,147 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:15:16,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:15:16,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:15:16,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:15:16,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:15:16,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:15:16,148 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:15:16,149 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:15:16,149 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:15:16,149 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:15:16,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:15:16,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:15:16,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:15:16,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:15:16,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:15:16,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:15:16,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:16,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:15:16,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:15:16,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:15:16,153 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:15:16,153 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:15:16,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:15:16,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:15:16,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:15:16,154 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2022-11-25 23:15:16,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:15:16,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:15:16,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:15:16,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:15:16,593 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:15:16,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2022-11-25 23:15:19,748 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:15:19,946 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:15:19,947 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c [2022-11-25 23:15:19,954 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/930dcb455/557da01fe2464617871686ab68676169/FLAG58fe486fd [2022-11-25 23:15:19,978 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/data/930dcb455/557da01fe2464617871686ab68676169 [2022-11-25 23:15:19,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:15:19,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:15:19,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:19,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:15:19,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:15:19,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:19" (1/1) ... [2022-11-25 23:15:19,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18349d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:19, skipping insertion in model container [2022-11-25 23:15:19,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:15:19" (1/1) ... [2022-11-25 23:15:20,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:15:20,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:15:20,228 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-11-25 23:15:20,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:20,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:15:20,282 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2022-11-25 23:15:20,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:15:20,306 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:15:20,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20 WrapperNode [2022-11-25 23:15:20,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:15:20,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:20,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:15:20,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:15:20,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,340 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-11-25 23:15:20,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:15:20,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:15:20,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:15:20,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:15:20,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,383 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:15:20,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:15:20,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:15:20,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:15:20,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (1/1) ... [2022-11-25 23:15:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:15:20,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:20,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:15:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:15:20,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:15:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:15:20,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:15:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:15:20,552 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:15:20,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:15:20,748 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:15:20,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:15:20,754 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:15:20,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:20 BoogieIcfgContainer [2022-11-25 23:15:20,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:15:20,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:15:20,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:15:20,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:15:20,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:15:19" (1/3) ... [2022-11-25 23:15:20,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a713cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:20, skipping insertion in model container [2022-11-25 23:15:20,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:15:20" (2/3) ... [2022-11-25 23:15:20,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a713cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:15:20, skipping insertion in model container [2022-11-25 23:15:20,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:15:20" (3/3) ... [2022-11-25 23:15:20,765 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2022-11-25 23:15:20,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:15:20,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:15:20,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:15:20,858 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2bd25a38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:15:20,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:15:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:15:20,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:20,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:15:20,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:20,878 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-11-25 23:15:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:15:20,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434271456] [2022-11-25 23:15:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:20,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:20,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:15:20,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:15:20,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 23:15:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:15:21,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:21,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:21,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:15:21,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434271456] [2022-11-25 23:15:21,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434271456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:21,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:21,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:15:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898533143] [2022-11-25 23:15:21,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:15:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:15:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:15:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:15:21,098 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:21,115 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-25 23:15:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:15:21,117 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:15:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:21,125 INFO L225 Difference]: With dead ends: 21 [2022-11-25 23:15:21,125 INFO L226 Difference]: Without dead ends: 9 [2022-11-25 23:15:21,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:15:21,132 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:21,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-25 23:15:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-25 23:15:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-25 23:15:21,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-11-25 23:15:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:21,167 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-25 23:15:21,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-25 23:15:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:15:21,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:21,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:15:21,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:21,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:21,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-11-25 23:15:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:15:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627668468] [2022-11-25 23:15:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:21,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:21,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:15:21,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:15:21,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 23:15:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:15:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:21,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:15:21,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:15:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627668468] [2022-11-25 23:15:21,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627668468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:15:21,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:15:21,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:15:21,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989671184] [2022-11-25 23:15:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:15:21,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:15:21,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:15:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:15:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:15:21,544 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:21,577 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-11-25 23:15:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:15:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:15:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:21,579 INFO L225 Difference]: With dead ends: 16 [2022-11-25 23:15:21,579 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 23:15:21,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:15:21,583 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:21,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 23:15:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2022-11-25 23:15:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-25 23:15:21,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-25 23:15:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:21,594 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-25 23:15:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-25 23:15:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:15:21,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:21,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:21,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:21,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2022-11-25 23:15:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:15:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221241962] [2022-11-25 23:15:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:21,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:15:21,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:15:21,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 23:15:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:21,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:15:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:21,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:15:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221241962] [2022-11-25 23:15:21,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221241962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:21,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260576520] [2022-11-25 23:15:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:15:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:15:21,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:15:21,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-25 23:15:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:15:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:22,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260576520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:22,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428422509] [2022-11-25 23:15:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:15:22,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:22,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:22,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:15:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:15:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:15:22,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:22,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:22,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428422509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:22,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:15:22,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2022-11-25 23:15:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033087465] [2022-11-25 23:15:22,288 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:22,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:15:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:15:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:15:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:15:22,301 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:22,373 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-11-25 23:15:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:15:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:15:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:22,376 INFO L225 Difference]: With dead ends: 23 [2022-11-25 23:15:22,378 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 23:15:22,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:15:22,381 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:22,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:15:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 23:15:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 23:15:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-25 23:15:22,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-11-25 23:15:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:22,399 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-25 23:15:22,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-25 23:15:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:15:22,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:22,401 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:22,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:22,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:22,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:23,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:23,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:23,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2022-11-25 23:15:23,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:15:23,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585413018] [2022-11-25 23:15:23,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:15:23,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:15:23,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:15:23,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 23:15:23,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:15:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:15:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:15:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585413018] [2022-11-25 23:15:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585413018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [452126400] [2022-11-25 23:15:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:15:23,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:15:23,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:15:23,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:15:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-25 23:15:23,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:15:23,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:15:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [452126400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:23,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707362188] [2022-11-25 23:15:23,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:15:23,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:23,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:23,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:23,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:15:23,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:15:23,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:15:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707362188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:23,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:15:23,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2022-11-25 23:15:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517504414] [2022-11-25 23:15:23,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:15:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:15:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:15:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:15:23,894 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:15:24,177 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-25 23:15:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:15:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 23:15:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:15:24,179 INFO L225 Difference]: With dead ends: 41 [2022-11-25 23:15:24,179 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:15:24,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:15:24,181 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:15:24,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 90 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:15:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:15:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-25 23:15:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-25 23:15:24,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2022-11-25 23:15:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:15:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-25 23:15:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:15:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-25 23:15:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:15:24,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:15:24,192 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-25 23:15:24,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:24,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:24,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:15:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:24,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:15:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:15:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2022-11-25 23:15:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:15:24,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30722543] [2022-11-25 23:15:24,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:24,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:15:24,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:15:24,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:15:24,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 23:15:24,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:15:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:24,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:15:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:28,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:32,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:15:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30722543] [2022-11-25 23:15:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30722543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686729629] [2022-11-25 23:15:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:32,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:15:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:15:32,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:15:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-25 23:15:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:15:32,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:32,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:15:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:35,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686729629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:35,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578136251] [2022-11-25 23:15:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:15:35,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:15:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:15:35,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:15:35,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:15:35,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:15:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:15:35,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 23:15:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:15:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:38,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:15:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:15:41,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578136251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:15:41,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:15:41,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2022-11-25 23:15:41,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040710716] [2022-11-25 23:15:41,774 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:15:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-25 23:15:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:15:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-25 23:15:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 23:15:41,780 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:16:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:49,650 INFO L93 Difference]: Finished difference Result 240 states and 322 transitions. [2022-11-25 23:16:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-25 23:16:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:16:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:49,654 INFO L225 Difference]: With dead ends: 240 [2022-11-25 23:16:49,654 INFO L226 Difference]: Without dead ends: 224 [2022-11-25 23:16:49,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11910 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=7865, Invalid=22585, Unknown=0, NotChecked=0, Total=30450 [2022-11-25 23:16:49,666 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 306 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:49,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 79 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 23:16:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-25 23:16:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2022-11-25 23:16:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.3812154696132597) internal successors, (250), 181 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:16:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 250 transitions. [2022-11-25 23:16:49,729 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 250 transitions. Word has length 30 [2022-11-25 23:16:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:49,731 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 250 transitions. [2022-11-25 23:16:49,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:16:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 250 transitions. [2022-11-25 23:16:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:16:49,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:49,733 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:49,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:49,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:50,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:50,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:50,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2022-11-25 23:16:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:16:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226272500] [2022-11-25 23:16:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:50,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:16:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:16:50,346 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:16:50,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 23:16:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:50,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:16:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:51,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:56,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:16:56,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226272500] [2022-11-25 23:16:56,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226272500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:16:56,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1707955465] [2022-11-25 23:16:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:56,547 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:16:56,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:16:56,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:16:56,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-25 23:16:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:56,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:16:56,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:57,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1707955465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:16:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165018251] [2022-11-25 23:16:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:58,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:58,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:58,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:16:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:58,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 23:16:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:17:06,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165018251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:06,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:17:06,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2022-11-25 23:17:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694270240] [2022-11-25 23:17:06,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 23:17:06,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:17:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 23:17:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 23:17:06,645 INFO L87 Difference]: Start difference. First operand 182 states and 250 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:18:22,403 INFO L93 Difference]: Finished difference Result 314 states and 426 transitions. [2022-11-25 23:18:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 23:18:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:18:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:18:22,405 INFO L225 Difference]: With dead ends: 314 [2022-11-25 23:18:22,405 INFO L226 Difference]: Without dead ends: 267 [2022-11-25 23:18:22,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7116 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=4666, Invalid=20774, Unknown=0, NotChecked=0, Total=25440 [2022-11-25 23:18:22,414 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 329 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:18:22,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 171 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-11-25 23:18:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-25 23:18:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 202. [2022-11-25 23:18:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.3781094527363185) internal successors, (277), 201 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 277 transitions. [2022-11-25 23:18:22,481 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 277 transitions. Word has length 30 [2022-11-25 23:18:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:18:22,481 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 277 transitions. [2022-11-25 23:18:22,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:18:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 277 transitions. [2022-11-25 23:18:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:18:22,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:18:22,484 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:18:22,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:22,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:22,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:18:23,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:18:23,091 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:18:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:18:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2022-11-25 23:18:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:18:23,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721991504] [2022-11-25 23:18:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:18:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:18:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:18:23,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:18:23,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 23:18:23,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:18:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:18:23,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:18:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:24,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:29,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:18:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721991504] [2022-11-25 23:18:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721991504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1164666183] [2022-11-25 23:18:29,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:18:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:18:29,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:18:29,476 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:18:29,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-25 23:18:29,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:18:29,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:18:29,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:18:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1164666183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366220605] [2022-11-25 23:18:30,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:18:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:18:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:30,802 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:18:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:18:30,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:18:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:18:30,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 23:18:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:18:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:31,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:18:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:18:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366220605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:18:39,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:18:39,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2022-11-25 23:18:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359148309] [2022-11-25 23:18:39,093 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:18:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 23:18:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:18:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 23:18:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 23:18:39,096 INFO L87 Difference]: Start difference. First operand 202 states and 277 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:16,365 INFO L93 Difference]: Finished difference Result 506 states and 701 transitions. [2022-11-25 23:21:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-11-25 23:21:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:21:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:16,369 INFO L225 Difference]: With dead ends: 506 [2022-11-25 23:21:16,369 INFO L226 Difference]: Without dead ends: 446 [2022-11-25 23:21:16,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23164 ImplicationChecksByTransitivity, 161.6s TimeCoverageRelationStatistics Valid=11678, Invalid=60952, Unknown=0, NotChecked=0, Total=72630 [2022-11-25 23:21:16,379 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 483 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:16,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 127 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-25 23:21:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-25 23:21:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 244. [2022-11-25 23:21:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.3703703703703705) internal successors, (333), 243 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 333 transitions. [2022-11-25 23:21:16,509 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 333 transitions. Word has length 30 [2022-11-25 23:21:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:16,510 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 333 transitions. [2022-11-25 23:21:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:21:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 333 transitions. [2022-11-25 23:21:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:21:16,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:16,514 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:21:16,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:16,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:16,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:21:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:17,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2022-11-25 23:21:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:21:17,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656582518] [2022-11-25 23:21:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:21:17,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:21:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:21:17,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:21:17,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 23:21:17,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:21:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:17,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 23:21:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:19,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:25,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:21:25,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656582518] [2022-11-25 23:21:25,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656582518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:25,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1333387793] [2022-11-25 23:21:25,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:21:25,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:21:25,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:21:25,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:21:25,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-25 23:21:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:21:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:26,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 23:21:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:26,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:28,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1333387793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135203811] [2022-11-25 23:21:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:21:28,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:28,040 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:28,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:21:28,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:21:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:21:28,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 23:21:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:21:35,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135203811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:35,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:21:35,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2022-11-25 23:21:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272750258] [2022-11-25 23:21:35,798 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:21:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 23:21:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:21:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 23:21:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=5399, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 23:21:35,801 INFO L87 Difference]: Start difference. First operand 244 states and 333 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:23:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:09,780 INFO L93 Difference]: Finished difference Result 536 states and 728 transitions. [2022-11-25 23:23:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-25 23:23:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:23:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:09,782 INFO L225 Difference]: With dead ends: 536 [2022-11-25 23:23:09,782 INFO L226 Difference]: Without dead ends: 492 [2022-11-25 23:23:09,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14808 ImplicationChecksByTransitivity, 101.1s TimeCoverageRelationStatistics Valid=8675, Invalid=32331, Unknown=0, NotChecked=0, Total=41006 [2022-11-25 23:23:09,785 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 394 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:09,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 76 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-25 23:23:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-25 23:23:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 362. [2022-11-25 23:23:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.3822714681440442) internal successors, (499), 361 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:23:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2022-11-25 23:23:09,936 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 30 [2022-11-25 23:23:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:09,937 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2022-11-25 23:23:09,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:23:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2022-11-25 23:23:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:23:09,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:09,938 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:09,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 23:23:10,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:10,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:23:10,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2022-11-25 23:23:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:23:10,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715227189] [2022-11-25 23:23:10,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:23:10,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:23:10,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:23:10,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:23:10,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 23:23:10,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:23:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:10,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:23:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:12,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:17,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:23:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715227189] [2022-11-25 23:23:17,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715227189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:17,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551881157] [2022-11-25 23:23:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:23:17,097 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:23:17,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:23:17,099 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:23:17,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-25 23:23:17,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:23:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:17,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:23:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:17,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:18,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551881157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465963257] [2022-11-25 23:23:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:23:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:18,491 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:23:18,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:23:18,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:18,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:23:18,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:19,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465963257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:27,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:23:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2022-11-25 23:23:27,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530148354] [2022-11-25 23:23:27,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:27,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 23:23:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:23:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 23:23:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 23:23:27,176 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:25:24,618 INFO L93 Difference]: Finished difference Result 610 states and 845 transitions. [2022-11-25 23:25:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-25 23:25:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:25:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:25:24,621 INFO L225 Difference]: With dead ends: 610 [2022-11-25 23:25:24,622 INFO L226 Difference]: Without dead ends: 527 [2022-11-25 23:25:24,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12037 ImplicationChecksByTransitivity, 120.9s TimeCoverageRelationStatistics Valid=6460, Invalid=35770, Unknown=0, NotChecked=0, Total=42230 [2022-11-25 23:25:24,629 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 489 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:25:24,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 143 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-25 23:25:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-25 23:25:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 413. [2022-11-25 23:25:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.395631067961165) internal successors, (575), 412 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 575 transitions. [2022-11-25 23:25:24,833 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 575 transitions. Word has length 30 [2022-11-25 23:25:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:25:24,833 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 575 transitions. [2022-11-25 23:25:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:25:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 575 transitions. [2022-11-25 23:25:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:25:24,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:25:24,835 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 23:25:24,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:25,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:25,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:25:25,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:25:25,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:25:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:25:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2022-11-25 23:25:25,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:25:25,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194520209] [2022-11-25 23:25:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:25:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:25:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:25:25,440 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:25:25,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 23:25:25,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 23:25:25,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:25,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 23:25:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:27,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:32,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:25:32,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194520209] [2022-11-25 23:25:32,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194520209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:32,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [646821411] [2022-11-25 23:25:32,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:25:32,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:25:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:25:32,756 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:25:32,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-25 23:25:32,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 23:25:32,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:32,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 23:25:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:33,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:34,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [646821411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:34,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550321985] [2022-11-25 23:25:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:25:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:34,724 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 23:25:34,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-25 23:25:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:25:34,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:25:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:25:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:35,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:25:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:25:43,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550321985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:25:43,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:25:43,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2022-11-25 23:25:43,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857676667] [2022-11-25 23:25:43,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:25:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 23:25:43,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:25:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 23:25:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 23:25:43,369 INFO L87 Difference]: Start difference. First operand 413 states and 575 transitions. Second operand has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:54,891 INFO L93 Difference]: Finished difference Result 649 states and 906 transitions. [2022-11-25 23:27:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-25 23:27:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-25 23:27:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:54,893 INFO L225 Difference]: With dead ends: 649 [2022-11-25 23:27:54,893 INFO L226 Difference]: Without dead ends: 572 [2022-11-25 23:27:54,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13442 ImplicationChecksByTransitivity, 137.6s TimeCoverageRelationStatistics Valid=7480, Invalid=38530, Unknown=0, NotChecked=0, Total=46010 [2022-11-25 23:27:54,896 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 519 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:54,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 98 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 23:27:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-25 23:27:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 429. [2022-11-25 23:27:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3901869158878504) internal successors, (595), 428 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 595 transitions. [2022-11-25 23:27:55,108 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 595 transitions. Word has length 30 [2022-11-25 23:27:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:55,108 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 595 transitions. [2022-11-25 23:27:55,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 595 transitions. [2022-11-25 23:27:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:27:55,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:55,110 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:55,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:55,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:55,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:55,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:55,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2022-11-25 23:27:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:27:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929156662] [2022-11-25 23:27:55,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 23:27:55,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:27:55,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:27:55,724 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:27:55,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 23:27:55,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 23:27:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:27:55,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:27:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:27:57,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:28:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:28:03,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:28:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929156662] [2022-11-25 23:28:03,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929156662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:28:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1615725320] [2022-11-25 23:28:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 23:28:03,550 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:28:03,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:28:03,552 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:28:03,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-25 23:28:03,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 23:28:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:28:03,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:28:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:28:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:28:04,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:28:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:28:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1615725320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:28:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861993898] [2022-11-25 23:28:05,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 23:28:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:28:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:28:05,503 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:28:05,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cca6e86-e37f-4e83-9a7a-199dead6b236/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 23:28:05,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 23:28:05,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:28:05,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 23:28:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:28:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:28:07,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:28:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:28:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861993898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:28:16,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:28:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2022-11-25 23:28:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933007304] [2022-11-25 23:28:16,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:28:16,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 23:28:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:28:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 23:28:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5532, Unknown=0, NotChecked=0, Total=6806 [2022-11-25 23:28:16,140 INFO L87 Difference]: Start difference. First operand 429 states and 595 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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)