./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:36:13,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:36:13,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:36:13,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:36:13,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:36:13,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:36:13,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:36:13,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:36:13,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:36:13,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:36:13,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:36:13,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:36:13,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:36:13,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:36:13,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:36:13,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:36:13,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:36:13,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:36:13,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:36:13,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:36:13,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:36:13,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:36:13,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:36:13,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:36:13,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:36:13,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:36:13,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:36:13,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:36:13,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:36:13,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:36:13,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:36:13,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:36:13,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:36:13,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:36:13,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:36:13,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:36:13,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:36:13,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:36:13,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:36:13,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:36:13,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:36:13,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:36:13,754 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:36:13,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:36:13,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:36:13,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:36:13,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:36:13,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:36:13,764 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:36:13,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:36:13,764 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:36:13,765 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:36:13,766 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:36:13,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:36:13,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:36:13,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:36:13,767 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:36:13,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:36:13,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:36:13,768 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:36:13,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:36:13,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:36:13,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:36:13,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:36:13,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:36:13,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:36:13,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:36:13,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:36:13,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:36:13,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:36:13,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:36:13,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:36:13,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:36:13,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:36:13,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:13,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:36:13,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:36:13,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:36:13,776 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:36:13,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:36:13,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:36:13,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:36:13,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:36:13,777 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c16561338eb70030ddc560fe6b7af6d1b48b7a566766a02092344cb5475a4c1a [2021-11-23 03:36:14,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:36:14,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:36:14,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:36:14,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:36:14,169 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:36:14,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-11-23 03:36:14,288 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/data/0dd5b9666/2534a2400bc24b0283cd1f91700d9150/FLAG220963564 [2021-11-23 03:36:14,999 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:15,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-11-23 03:36:15,022 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/data/0dd5b9666/2534a2400bc24b0283cd1f91700d9150/FLAG220963564 [2021-11-23 03:36:15,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/data/0dd5b9666/2534a2400bc24b0283cd1f91700d9150 [2021-11-23 03:36:15,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:36:15,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:36:15,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:15,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:36:15,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:36:15,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53102890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15, skipping insertion in model container [2021-11-23 03:36:15,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:36:15,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:36:15,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-11-23 03:36:15,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:15,678 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:36:15,699 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound20.c[524,537] [2021-11-23 03:36:15,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:36:15,750 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:36:15,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15 WrapperNode [2021-11-23 03:36:15,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:15,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:15,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:36:15,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:36:15,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,802 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2021-11-23 03:36:15,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:36:15,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:36:15,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:36:15,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:36:15,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:36:15,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:36:15,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:36:15,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:36:15,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (1/1) ... [2021-11-23 03:36:15,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:15,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:36:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:36:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:36:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:36:15,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:36:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:36:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:36:15,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:36:15,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:36:15,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:36:16,034 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:36:16,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:36:16,183 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:36:16,213 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:36:16,214 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:36:16,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:16 BoogieIcfgContainer [2021-11-23 03:36:16,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:36:16,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:36:16,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:36:16,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:36:16,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:15" (1/3) ... [2021-11-23 03:36:16,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1f120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:16, skipping insertion in model container [2021-11-23 03:36:16,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:15" (2/3) ... [2021-11-23 03:36:16,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1f120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:16, skipping insertion in model container [2021-11-23 03:36:16,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:16" (3/3) ... [2021-11-23 03:36:16,229 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.c [2021-11-23 03:36:16,236 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:36:16,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:36:16,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:36:16,371 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:36:16,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:36:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:36:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:36:16,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:16,400 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:16,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1046920148, now seen corresponding path program 1 times [2021-11-23 03:36:16,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:16,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449274894] [2021-11-23 03:36:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:16,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:16,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:16,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760909164] [2021-11-23 03:36:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:16,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:16,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:16,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:16,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:36:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:16,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:16,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449274894] [2021-11-23 03:36:16,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760909164] [2021-11-23 03:36:16,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760909164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:16,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:16,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:36:16,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521981408] [2021-11-23 03:36:16,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:36:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:16,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:36:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:36:16,744 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:16,778 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-23 03:36:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:36:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-23 03:36:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:16,791 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:36:16,792 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:36:16,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:36:16,801 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:16,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:36:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 03:36:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:36:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 03:36:16,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2021-11-23 03:36:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:16,877 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 03:36:16,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 03:36:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:36:16,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:16,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:16,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:17,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:17,108 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1317434454, now seen corresponding path program 1 times [2021-11-23 03:36:17,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:17,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096595645] [2021-11-23 03:36:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:17,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:17,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713676137] [2021-11-23 03:36:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:17,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:17,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:17,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:17,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:36:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:17,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:36:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:17,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:17,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:17,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096595645] [2021-11-23 03:36:17,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713676137] [2021-11-23 03:36:17,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713676137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:17,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:17,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:17,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399471287] [2021-11-23 03:36:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:17,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:36:17,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:36:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:17,331 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:17,356 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-11-23 03:36:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:36:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-23 03:36:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:17,358 INFO L225 Difference]: With dead ends: 26 [2021-11-23 03:36:17,358 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:36:17,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:36:17,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:17,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:36:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:36:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 03:36:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:36:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-23 03:36:17,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-11-23 03:36:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:17,369 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-23 03:36:17,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-23 03:36:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:36:17,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:17,370 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:17,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:17,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:17,592 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1319221914, now seen corresponding path program 1 times [2021-11-23 03:36:17,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:17,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877438025] [2021-11-23 03:36:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:17,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:17,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:17,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374967837] [2021-11-23 03:36:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:17,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:17,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:36:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:36:17,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:17,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:36:17,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:17,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877438025] [2021-11-23 03:36:17,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:17,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374967837] [2021-11-23 03:36:17,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374967837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:17,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:36:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357261340] [2021-11-23 03:36:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:17,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:36:17,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:17,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:36:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:36:17,898 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:18,056 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 03:36:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:36:18,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-23 03:36:18,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:18,058 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:36:18,058 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:36:18,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:36:18,060 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:18,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:36:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-23 03:36:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:36:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 03:36:18,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-23 03:36:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:18,085 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 03:36:18,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:36:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 03:36:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:36:18,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:18,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:18,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:18,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:18,290 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1562521278, now seen corresponding path program 1 times [2021-11-23 03:36:18,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:18,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425645615] [2021-11-23 03:36:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:18,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:18,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:18,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754599096] [2021-11-23 03:36:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:18,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:18,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:18,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:36:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:36:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:18,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425645615] [2021-11-23 03:36:18,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754599096] [2021-11-23 03:36:18,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754599096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:18,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97256573] [2021-11-23 03:36:18,849 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:36:18,849 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:18,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:18,862 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:18,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:19,708 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2021-11-23 03:36:20,109 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:36:20,211 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [97256573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:26,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:26,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8] total 21 [2021-11-23 03:36:26,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411855935] [2021-11-23 03:36:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:36:26,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:36:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:36:26,126 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:36:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:26,271 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-23 03:36:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:36:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-23 03:36:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:26,273 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:36:26,273 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 03:36:26,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-23 03:36:26,276 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:26,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-23 03:36:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 03:36:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 03:36:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:36:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 03:36:26,285 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-23 03:36:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:26,286 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 03:36:26,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 03:36:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 03:36:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:36:26,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:26,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:26,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:26,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:26,516 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash -182192907, now seen corresponding path program 1 times [2021-11-23 03:36:26,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620263936] [2021-11-23 03:36:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:26,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:26,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:26,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955556728] [2021-11-23 03:36:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:26,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:26,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:26,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:26,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:36:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:26,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:36:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:26,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:26,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620263936] [2021-11-23 03:36:26,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955556728] [2021-11-23 03:36:26,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955556728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:26,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470138327] [2021-11-23 03:36:26,773 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:36:26,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:26,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:26,774 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:26,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:28,023 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2021-11-23 03:36:28,299 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:36:28,360 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:29,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:36:29,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:29,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:29,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-23 03:36:29,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593452636] [2021-11-23 03:36:29,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:29,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:36:29,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:36:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:36:29,708 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:36:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:29,825 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-23 03:36:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:36:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2021-11-23 03:36:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:29,827 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:36:29,827 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:36:29,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:36:29,830 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:29,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:36:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:36:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-11-23 03:36:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:36:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-23 03:36:29,841 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 22 [2021-11-23 03:36:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:29,842 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-23 03:36:29,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 03:36:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-23 03:36:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:36:29,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:29,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:29,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:36:30,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:30,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:30,065 INFO L85 PathProgramCache]: Analyzing trace with hash -180405447, now seen corresponding path program 1 times [2021-11-23 03:36:30,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:30,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999140485] [2021-11-23 03:36:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:30,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:30,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:36:30,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730057415] [2021-11-23 03:36:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:30,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:30,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:30,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:30,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:36:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:36:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:36:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:41,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:36:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:36:48,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999140485] [2021-11-23 03:36:48,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:36:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730057415] [2021-11-23 03:36:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730057415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:36:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781126084] [2021-11-23 03:36:48,015 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:36:48,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:36:48,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:36:48,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:36:48,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:36:49,109 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2021-11-23 03:36:49,455 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:36:49,521 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:52,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '999#(and (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| 2147483648)) (= |__VERIFIER_assert_#in~cond| (ite (= (+ (* 2 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_27|)) (+ (* 4 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43|) (* 4 |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27|) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_27|))) 1 0)) (or (and (= |#NULL.offset| 0) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27| 1) (= ~counter~0 2) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= 0 (+ 4294967295 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_27|)) (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_27|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:36:52,687 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:36:52,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:36:52,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-11-23 03:36:52,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537757739] [2021-11-23 03:36:52,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:36:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:36:52,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:36:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=433, Unknown=1, NotChecked=0, Total=506 [2021-11-23 03:36:52,689 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:36:54,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:05,847 WARN L227 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 49 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:37:07,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:08,831 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-23 03:37:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:37:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2021-11-23 03:37:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:08,832 INFO L225 Difference]: With dead ends: 59 [2021-11-23 03:37:08,832 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 03:37:08,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=91, Invalid=558, Unknown=1, NotChecked=0, Total=650 [2021-11-23 03:37:08,834 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:08,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 03:37:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 03:37:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-11-23 03:37:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:37:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-23 03:37:08,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 22 [2021-11-23 03:37:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:08,846 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-23 03:37:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 03:37:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-23 03:37:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:37:08,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:08,847 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:08,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:37:09,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:37:09,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash 408559265, now seen corresponding path program 1 times [2021-11-23 03:37:09,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:09,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584233669] [2021-11-23 03:37:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:09,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:09,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:37:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289744260] [2021-11-23 03:37:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:09,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:09,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:37:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:37:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:37:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:37:09,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584233669] [2021-11-23 03:37:09,370 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:37:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289744260] [2021-11-23 03:37:09,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289744260] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516120483] [2021-11-23 03:37:09,374 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:37:09,378 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:09,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:09,379 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:09,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:10,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2021-11-23 03:37:11,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:37:11,282 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:14,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1335#(and (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_37| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_59| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37| Int)) (and (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37|) (<= 0 (+ 4294967295 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_37|)) (<= 0 (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_59| 2147483648)) (= |__VERIFIER_assert_#in~cond| (ite (= (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_37|) (* 4 |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_34|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37|) (* 4 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_59|)) (+ (* 2 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37|) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_37|))) 1 0)) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_59| 2147483647) (or (and (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_37| 1) (= |#NULL.offset| 0) (= ~counter~0 1) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:37:14,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:14,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:37:14,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-23 03:37:14,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205781606] [2021-11-23 03:37:14,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:37:14,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:37:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:37:14,565 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:37:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:14,694 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-23 03:37:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:37:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2021-11-23 03:37:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:14,696 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:37:14,696 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:37:14,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:37:14,698 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:14,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 67 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:37:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 03:37:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:37:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-23 03:37:14,710 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 28 [2021-11-23 03:37:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:14,710 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-23 03:37:14,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 03:37:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-23 03:37:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 03:37:14,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:14,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:14,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:14,916 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -235004718, now seen corresponding path program 2 times [2021-11-23 03:37:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382586671] [2021-11-23 03:37:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:14,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:14,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:37:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297694312] [2021-11-23 03:37:14,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:37:14,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:14,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:14,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:14,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:37:16,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:37:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:37:16,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:37:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:37:16,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:37:16,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:16,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382586671] [2021-11-23 03:37:16,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:37:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297694312] [2021-11-23 03:37:16,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297694312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:16,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032167446] [2021-11-23 03:37:16,450 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:37:16,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:16,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:16,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:16,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:17,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 79 for LOIs [2021-11-23 03:37:17,939 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:37:17,991 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:22,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1770#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_45| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73| 2147483647) (<= 0 (+ 4294967295 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_45|)) (or (and (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45| 1) (= |#NULL.offset| 0) (= ~counter~0 2) (= |#NULL.base| 0)) (and (= |#NULL.offset| 0) (= |#NULL.base| 0))) (= (ite (= (+ (* 2 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45|) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_45|)) (+ (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_45|) (* 4 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73|) (* 4 |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45|))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_45|) (<= 0 (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_73| 2147483648)))))' at error location [2021-11-23 03:37:22,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:22,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:37:22,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-23 03:37:22,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006009279] [2021-11-23 03:37:22,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:37:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:22,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:37:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:37:22,151 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 03:37:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:22,426 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-11-23 03:37:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 03:37:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 46 [2021-11-23 03:37:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:22,430 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:37:22,430 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:37:22,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 03:37:22,432 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:22,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 128 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:37:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-23 03:37:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 03:37:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-23 03:37:22,447 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 46 [2021-11-23 03:37:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:22,448 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-23 03:37:22,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 03:37:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-23 03:37:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:37:22,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:22,458 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:22,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 03:37:22,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:22,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1419782260, now seen corresponding path program 3 times [2021-11-23 03:37:22,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:22,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75072868] [2021-11-23 03:37:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:22,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:22,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:37:22,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949197997] [2021-11-23 03:37:22,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:37:22,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:22,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:22,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:37:23,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:37:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:37:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:37:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:37:23,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-23 03:37:23,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75072868] [2021-11-23 03:37:23,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:37:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949197997] [2021-11-23 03:37:23,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949197997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:23,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140938357] [2021-11-23 03:37:23,908 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:37:23,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:23,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:23,909 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:23,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:24,726 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2021-11-23 03:37:24,913 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-23 03:37:24,960 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:26,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2648#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 03:37:26,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:26,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:37:26,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-11-23 03:37:26,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383531372] [2021-11-23 03:37:26,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:26,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:37:26,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:37:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:37:26,628 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-11-23 03:37:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:27,180 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2021-11-23 03:37:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 03:37:27,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 94 [2021-11-23 03:37:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:27,185 INFO L225 Difference]: With dead ends: 178 [2021-11-23 03:37:27,185 INFO L226 Difference]: Without dead ends: 173 [2021-11-23 03:37:27,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:37:27,189 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:27,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 151 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:37:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-23 03:37:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-23 03:37:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 03:37:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-11-23 03:37:27,215 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 94 [2021-11-23 03:37:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-11-23 03:37:27,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-11-23 03:37:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-11-23 03:37:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 03:37:27,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:27,221 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:27,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:27,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:37:27,440 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash 873684674, now seen corresponding path program 4 times [2021-11-23 03:37:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097398378] [2021-11-23 03:37:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:27,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:27,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:37:27,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713741399] [2021-11-23 03:37:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:37:27,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:27,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:27,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:37:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:37:28,937 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:37:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:37:29,753 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:37:29,754 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:37:29,755 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:37:29,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:29,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:37:29,967 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:29,970 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:37:30,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:37:30 BoogieIcfgContainer [2021-11-23 03:37:30,083 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:37:30,084 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:37:30,085 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:37:30,085 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:37:30,085 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:16" (3/4) ... [2021-11-23 03:37:30,088 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:37:30,262 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:37:30,263 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:37:30,264 INFO L158 Benchmark]: Toolchain (without parser) took 74922.73ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 91.9MB in the beginning and 85.3MB in the end (delta: 6.5MB). Peak memory consumption was 64.4MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,266 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 77.6MB. Free memory is still 35.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:37:30,266 INFO L158 Benchmark]: CACSL2BoogieTranslator took 402.92ms. Allocated memory is still 125.8MB. Free memory was 91.6MB in the beginning and 100.4MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,267 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.26ms. Allocated memory is still 125.8MB. Free memory was 100.4MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,268 INFO L158 Benchmark]: Boogie Preprocessor took 47.11ms. Allocated memory is still 125.8MB. Free memory was 98.7MB in the beginning and 97.8MB in the end (delta: 887.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,269 INFO L158 Benchmark]: RCFGBuilder took 364.98ms. Allocated memory is still 125.8MB. Free memory was 97.8MB in the beginning and 87.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,269 INFO L158 Benchmark]: TraceAbstraction took 73864.42ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 86.9MB in the beginning and 93.7MB in the end (delta: -6.8MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,270 INFO L158 Benchmark]: Witness Printer took 179.34ms. Allocated memory is still 184.5MB. Free memory was 93.7MB in the beginning and 85.3MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 03:37:30,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 77.6MB. Free memory is still 35.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 402.92ms. Allocated memory is still 125.8MB. Free memory was 91.6MB in the beginning and 100.4MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.26ms. Allocated memory is still 125.8MB. Free memory was 100.4MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.11ms. Allocated memory is still 125.8MB. Free memory was 98.7MB in the beginning and 97.8MB in the end (delta: 887.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.98ms. Allocated memory is still 125.8MB. Free memory was 97.8MB in the beginning and 87.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 73864.42ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 86.9MB in the beginning and 93.7MB in the end (delta: -6.8MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. * Witness Printer took 179.34ms. Allocated memory is still 184.5MB. Free memory was 93.7MB in the beginning and 85.3MB in the end (delta: 8.4MB). Peak memory consumption was 6.3MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [A=125, counter=0, R=-8] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) VAL [A=125, counter=0, R=-8] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [A=125, counter=0, r=-61, R=-8, u=-15, v=1] [L34] EXPR counter++ VAL [A=125, counter=1, counter++=0, R=-8, r=-61, u=-15, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=1, r=-61, R=-8, u=-15, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=1, r=-76, R=-8, u=-13, v=1] [L34] EXPR counter++ VAL [A=125, counter=2, counter++=1, R=-8, r=-76, u=-13, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=2, r=-76, R=-8, u=-13, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=2, r=-89, R=-8, u=-11, v=1] [L34] EXPR counter++ VAL [A=125, counter=3, counter++=2, R=-8, r=-89, u=-11, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=3, R=-8, r=-89, u=-11, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=3, R=-8, r=-100, u=-9, v=1] [L34] EXPR counter++ VAL [A=125, counter=4, counter++=3, r=-100, R=-8, u=-9, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=4, R=-8, r=-100, u=-9, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=4, R=-8, r=-109, u=-7, v=1] [L34] EXPR counter++ VAL [A=125, counter=5, counter++=4, r=-109, R=-8, u=-7, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=5, r=-109, R=-8, u=-7, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=5, R=-8, r=-116, u=-5, v=1] [L34] EXPR counter++ VAL [A=125, counter=6, counter++=5, R=-8, r=-116, u=-5, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=6, r=-116, R=-8, u=-5, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=6, R=-8, r=-121, u=-3, v=1] [L34] EXPR counter++ VAL [A=125, counter=7, counter++=6, r=-121, R=-8, u=-3, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=7, R=-8, r=-121, u=-3, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=7, R=-8, r=-124, u=-1, v=1] [L34] EXPR counter++ VAL [A=125, counter=8, counter++=7, r=-124, R=-8, u=-1, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=8, R=-8, r=-124, u=-1, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=8, r=-125, R=-8, u=1, v=1] [L34] EXPR counter++ VAL [A=125, counter=9, counter++=8, r=-125, R=-8, u=1, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=9, R=-8, r=-125, u=1, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=9, r=-124, R=-8, u=3, v=1] [L34] EXPR counter++ VAL [A=125, counter=10, counter++=9, R=-8, r=-124, u=3, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=10, R=-8, r=-124, u=3, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=10, R=-8, r=-121, u=5, v=1] [L34] EXPR counter++ VAL [A=125, counter=11, counter++=10, r=-121, R=-8, u=5, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=11, R=-8, r=-121, u=5, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=11, R=-8, r=-116, u=7, v=1] [L34] EXPR counter++ VAL [A=125, counter=12, counter++=11, R=-8, r=-116, u=7, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=12, R=-8, r=-116, u=7, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=12, R=-8, r=-109, u=9, v=1] [L34] EXPR counter++ VAL [A=125, counter=13, counter++=12, R=-8, r=-109, u=9, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=13, r=-109, R=-8, u=9, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=13, R=-8, r=-100, u=11, v=1] [L34] EXPR counter++ VAL [A=125, counter=14, counter++=13, R=-8, r=-100, u=11, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=14, R=-8, r=-100, u=11, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=14, r=-89, R=-8, u=13, v=1] [L34] EXPR counter++ VAL [A=125, counter=15, counter++=14, r=-89, R=-8, u=13, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=15, r=-89, R=-8, u=13, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=15, r=-76, R=-8, u=15, v=1] [L34] EXPR counter++ VAL [A=125, counter=16, counter++=15, R=-8, r=-76, u=15, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=16, r=-76, R=-8, u=15, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=16, R=-8, r=-61, u=17, v=1] [L34] EXPR counter++ VAL [A=125, counter=17, counter++=16, R=-8, r=-61, u=17, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=17, r=-61, R=-8, u=17, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=17, R=-8, r=-44, u=19, v=1] [L34] EXPR counter++ VAL [A=125, counter=18, counter++=17, R=-8, r=-44, u=19, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=18, R=-8, r=-44, u=19, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=18, R=-8, r=-25, u=21, v=1] [L34] EXPR counter++ VAL [A=125, counter=19, counter++=18, r=-25, R=-8, u=21, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=19, R=-8, r=-25, u=21, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=19, R=-8, r=-4, u=23, v=1] [L34] EXPR counter++ VAL [A=125, counter=20, counter++=19, r=-4, R=-8, u=23, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=125, counter=20, r=-4, R=-8, u=23, v=1] [L36] COND FALSE !(!(r != 0)) [L38] COND FALSE !(r > 0) [L42] r = r + u [L43] u = u + 2 VAL [A=125, counter=20, r=19, R=-8, u=25, v=1] [L34] EXPR counter++ VAL [A=125, counter=21, counter++=20, r=19, R=-8, u=25, v=1] [L34] COND FALSE !(counter++<20) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.6s, OverallIterations: 10, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 17.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 242 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 652 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 32 IncrementalHoareTripleChecker+Unchecked, 566 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 454 IncrementalHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 157 mSDtfsCounter, 454 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 760 GetRequests, 565 SyntacticMatches, 10 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 39.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=9, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 447 NumberOfCodeBlocks, 447 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 1795 SizeOfPredicates, 34 NumberOfNonLiveVariables, 893 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 323/1004 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: OVERALL_TIME: 1.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.5s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 1.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 46, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 145, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 03:37:30,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3320c7-0e99-46e6-b030-c03ba6faff7c/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE