./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8 --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 c8661b1e533413e4de6576c4feab251d05a672526bd5f59b260c6cb9f9c05939 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:50:32,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:50:32,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:50:32,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:50:32,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:50:32,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:50:32,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:50:32,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:50:32,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:50:32,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:50:32,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:50:32,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:50:32,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:50:32,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:50:32,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:50:32,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:50:32,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:50:32,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:50:32,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:50:32,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:50:32,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:50:32,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:50:32,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:50:32,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:50:32,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:50:32,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:50:32,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:50:32,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:50:32,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:50:32,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:50:32,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:50:32,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:50:32,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:50:32,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:50:32,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:50:32,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:50:32,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:50:32,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:50:32,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:50:32,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:50:32,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:50:32,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:50:32,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:50:32,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:50:32,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:50:32,818 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:50:32,818 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:50:32,818 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:50:32,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:50:32,819 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:50:32,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:50:32,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:50:32,820 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:50:32,820 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:50:32,821 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:50:32,821 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:50:32,821 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:50:32,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:50:32,823 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:50:32,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:50:32,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:50:32,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:50:32,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:50:32,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:50:32,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:50:32,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:50:32,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:50:32,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:50:32,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:50:32,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:50:32,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:50:32,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:50:32,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:50:32,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:50:32,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:50:32,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:50:32,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:50:32,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:50:32,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:50:32,829 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:50:32,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:50:32,830 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_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8661b1e533413e4de6576c4feab251d05a672526bd5f59b260c6cb9f9c05939 [2021-11-07 01:50:33,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:50:33,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:50:33,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:50:33,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:50:33,305 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:50:33,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-11-07 01:50:33,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/data/c9b067ce7/e7f0a720026a49358c55fdce17548d0b/FLAG4207769a8 [2021-11-07 01:50:34,013 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:50:34,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-11-07 01:50:34,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/data/c9b067ce7/e7f0a720026a49358c55fdce17548d0b/FLAG4207769a8 [2021-11-07 01:50:34,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/data/c9b067ce7/e7f0a720026a49358c55fdce17548d0b [2021-11-07 01:50:34,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:50:34,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:50:34,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:50:34,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:50:34,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:50:34,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1921c5d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34, skipping insertion in model container [2021-11-07 01:50:34,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:50:34,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:50:34,701 WARN L228 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_5ae91287-c392-4691-a1bd-1de4b351fb04/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-11-07 01:50:34,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:50:34,725 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:50:34,742 WARN L228 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_5ae91287-c392-4691-a1bd-1de4b351fb04/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-11-07 01:50:34,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:50:34,763 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:50:34,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34 WrapperNode [2021-11-07 01:50:34,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:50:34,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:50:34,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:50:34,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:50:34,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:50:34,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:50:34,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:50:34,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:50:34,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:50:34,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:50:34,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:50:34,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:50:34,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (1/1) ... [2021-11-07 01:50:34,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:50:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:34,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:50:34,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:50:34,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:50:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:50:34,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:50:34,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:50:35,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:50:35,355 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:50:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:50:35 BoogieIcfgContainer [2021-11-07 01:50:35,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:50:35,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:50:35,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:50:35,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:50:35,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:50:34" (1/3) ... [2021-11-07 01:50:35,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edc5156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:50:35, skipping insertion in model container [2021-11-07 01:50:35,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:50:34" (2/3) ... [2021-11-07 01:50:35,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edc5156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:50:35, skipping insertion in model container [2021-11-07 01:50:35,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:50:35" (3/3) ... [2021-11-07 01:50:35,384 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2021-11-07 01:50:35,391 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:50:35,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:50:35,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:50:35,514 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 [2021-11-07 01:50:35,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:50:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:50:35,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:35,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:50:35,548 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 59349214, now seen corresponding path program 1 times [2021-11-07 01:50:35,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:35,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294607244] [2021-11-07 01:50:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:35,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:35,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:35,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294607244] [2021-11-07 01:50:35,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294607244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:35,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:35,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:50:35,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343729370] [2021-11-07 01:50:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:35,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:35,891 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:35,943 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-07 01:50:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-07 01:50:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:35,957 INFO L225 Difference]: With dead ends: 16 [2021-11-07 01:50:35,958 INFO L226 Difference]: Without dead ends: 7 [2021-11-07 01:50:35,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-07 01:50:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-07 01:50:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-07 01:50:36,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-07 01:50:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:36,007 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-07 01:50:36,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-07 01:50:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:50:36,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:36,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:50:36,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:50:36,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1839242300, now seen corresponding path program 1 times [2021-11-07 01:50:36,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:36,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065470996] [2021-11-07 01:50:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:36,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:36,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:36,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065470996] [2021-11-07 01:50:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065470996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:36,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145712407] [2021-11-07 01:50:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:36,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:36,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:36,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:36,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:50:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:36,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:36,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145712407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:36,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025190718] [2021-11-07 01:50:36,415 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:36,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:36,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:36,430 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:36,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:36,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,479 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:36,480 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:36,486 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:36,487 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,489 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:36,495 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:36,536 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_8|], 10=[|v_#valid_9|]} [2021-11-07 01:50:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:36,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:36,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:36,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:36,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:36,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:36,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:36,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:36,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:36,713 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:36,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:36,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:36,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,760 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:36,765 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:36,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:36,768 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:36,786 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:36,796 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-11-07 01:50:36,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:36,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:36,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,033 INFO L180 QuantifierPusher]: treesize reduction 16, result has 92.9 percent of original size [2021-11-07 01:50:37,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:37,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:37,255 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:37,274 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:37,283 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:37,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:37,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:37,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-07 01:50:37,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352474629] [2021-11-07 01:50:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:37,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:37,674 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:37,697 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-07 01:50:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:50:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 01:50:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:37,699 INFO L225 Difference]: With dead ends: 13 [2021-11-07 01:50:37,700 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 01:50:37,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 01:50:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-07 01:50:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-07 01:50:37,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2021-11-07 01:50:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:37,706 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-07 01:50:37,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-07 01:50:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:50:37,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:37,707 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-07 01:50:37,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:37,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:37,921 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:37,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1390313566, now seen corresponding path program 2 times [2021-11-07 01:50:37,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:37,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100464792] [2021-11-07 01:50:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:37,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:38,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:38,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100464792] [2021-11-07 01:50:38,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100464792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:38,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856727371] [2021-11-07 01:50:38,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:50:38,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:38,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:38,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:50:38,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:50:38,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:50:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:38,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:38,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856727371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:38,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890833736] [2021-11-07 01:50:38,291 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:38,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:38,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:38,292 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:38,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:38,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,303 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:38,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:38,306 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:38,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:38,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:38,316 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 10=[|v_#valid_10|]} [2021-11-07 01:50:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:38,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,329 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:38,330 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,330 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:38,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:38,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:38,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:38,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:38,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:38,356 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:38,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:38,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:38,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,371 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:38,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:38,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:38,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:38,383 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:38,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:50:38,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,462 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.1 percent of original size [2021-11-07 01:50:38,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:38,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:38,574 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:38,578 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:38,585 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:38,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:38,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:38,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-07 01:50:38,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824122205] [2021-11-07 01:50:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:50:38,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:50:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:38,981 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:39,019 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-07 01:50:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:50:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-07 01:50:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:39,021 INFO L225 Difference]: With dead ends: 19 [2021-11-07 01:50:39,022 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:50:39,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:50:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:50:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 01:50:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-07 01:50:39,028 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2021-11-07 01:50:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-07 01:50:39,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-07 01:50:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:50:39,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:39,030 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-07 01:50:39,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:39,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 01:50:39,245 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -955493474, now seen corresponding path program 3 times [2021-11-07 01:50:39,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:39,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101824161] [2021-11-07 01:50:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:39,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:39,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101824161] [2021-11-07 01:50:39,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101824161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:39,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053100506] [2021-11-07 01:50:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:50:39,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:39,491 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:50:39,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:50:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:50:39,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:40,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053100506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:40,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445662549] [2021-11-07 01:50:40,090 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:40,090 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:40,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:40,091 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:40,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:40,103 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,105 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:40,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:40,114 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:40,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:40,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:40,139 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 10=[|v_#valid_11|]} [2021-11-07 01:50:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:40,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:40,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:40,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:40,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:40,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:40,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:40,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:40,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:40,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,205 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:40,207 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:40,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:40,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:40,220 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:40,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:50:40,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,306 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.1 percent of original size [2021-11-07 01:50:40,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:40,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:40,394 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:40,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:40,405 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:40,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:40,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-11-07 01:50:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278687850] [2021-11-07 01:50:40,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 01:50:40,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 01:50:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:50:40,824 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:40,912 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2021-11-07 01:50:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:50:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 01:50:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:40,915 INFO L225 Difference]: With dead ends: 31 [2021-11-07 01:50:40,915 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 01:50:40,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:50:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 01:50:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 01:50:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-07 01:50:40,928 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2021-11-07 01:50:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:40,928 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-07 01:50:40,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-07 01:50:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:50:40,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:40,932 INFO L513 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-07 01:50:40,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:41,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 01:50:41,149 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash -643192290, now seen corresponding path program 4 times [2021-11-07 01:50:41,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:41,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750983948] [2021-11-07 01:50:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:41,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:41,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:41,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750983948] [2021-11-07 01:50:41,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750983948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:41,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925470083] [2021-11-07 01:50:41,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:50:41,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:41,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:50:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:50:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:41,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:42,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925470083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:42,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912201068] [2021-11-07 01:50:42,979 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:42,979 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:42,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:42,980 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:42,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:42,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:42,989 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:42,990 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:42,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:42,992 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:42,992 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:42,993 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:42,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:42,999 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 10=[|v_#valid_12|]} [2021-11-07 01:50:43,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:43,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:43,009 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:43,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:43,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:43,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:43,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:43,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:43,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:43,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:43,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:43,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:43,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,058 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:43,061 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:43,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:43,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:43,071 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:43,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:50:43,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,128 INFO L180 QuantifierPusher]: treesize reduction 20, result has 91.3 percent of original size [2021-11-07 01:50:43,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:43,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:43,189 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:43,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:43,203 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:43,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:43,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:43,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2021-11-07 01:50:43,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982959441] [2021-11-07 01:50:43,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 01:50:43,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 01:50:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=1513, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:50:43,612 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 48 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:43,746 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2021-11-07 01:50:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 01:50:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 01:50:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:43,753 INFO L225 Difference]: With dead ends: 55 [2021-11-07 01:50:43,754 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 01:50:43,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1139, Invalid=1513, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 01:50:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 01:50:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 01:50:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-11-07 01:50:43,776 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 27 [2021-11-07 01:50:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:43,777 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-11-07 01:50:43,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-11-07 01:50:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:50:43,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:43,782 INFO L513 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-07 01:50:43,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 01:50:44,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -870639842, now seen corresponding path program 5 times [2021-11-07 01:50:44,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:44,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147562028] [2021-11-07 01:50:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:44,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:45,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:45,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147562028] [2021-11-07 01:50:45,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147562028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:45,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261048249] [2021-11-07 01:50:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:50:45,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:45,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:45,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:50:45,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-07 01:50:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:50:45,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:49,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261048249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:49,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331780286] [2021-11-07 01:50:49,445 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:49,445 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:49,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:49,447 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:49,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:49,467 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,468 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:49,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:49,473 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:49,473 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:49,488 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:49,493 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 10=[|v_#valid_13|]} [2021-11-07 01:50:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:49,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,504 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:49,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,505 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:49,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:49,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:49,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:49,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:49,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,529 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:49,530 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,530 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:49,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:49,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:49,551 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:49,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:49,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:49,558 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:49,561 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-11-07 01:50:49,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,613 INFO L180 QuantifierPusher]: treesize reduction 20, result has 91.3 percent of original size [2021-11-07 01:50:49,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:49,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:49,667 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:49,670 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:49,679 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:50,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:50,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:50,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2021-11-07 01:50:50,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341663484] [2021-11-07 01:50:50,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 01:50:50,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 01:50:50,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4571, Invalid=5329, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 01:50:50,184 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 96 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:50,522 INFO L93 Difference]: Finished difference Result 103 states and 150 transitions. [2021-11-07 01:50:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 01:50:50,523 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:50:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:50,531 INFO L225 Difference]: With dead ends: 103 [2021-11-07 01:50:50,531 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 01:50:50,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4571, Invalid=5329, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 01:50:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 01:50:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-07 01:50:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-11-07 01:50:50,566 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 51 [2021-11-07 01:50:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:50,567 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-11-07 01:50:50,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-11-07 01:50:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:50:50,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:50,575 INFO L513 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-07 01:50:50,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:50,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 01:50:50,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash -816254690, now seen corresponding path program 6 times [2021-11-07 01:50:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:50,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384792050] [2021-11-07 01:50:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:50,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:55,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:50:55,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384792050] [2021-11-07 01:50:55,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384792050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:50:55,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059473321] [2021-11-07 01:50:55,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:50:55,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:55,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:55,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:55,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:50:55,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:50:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:50:55,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 01:50:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:56,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059473321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:57,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807719609] [2021-11-07 01:50:57,092 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:50:57,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:50:57,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:50:57,093 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:50:57,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:50:57,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,106 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:57,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:50:57,108 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:50:57,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:50:57,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:50:57,116 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 10=[|v_#valid_14|]} [2021-11-07 01:50:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:57,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:50:57,127 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,129 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:57,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:50:57,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:57,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:50:57,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,152 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:57,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,154 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:50:57,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:50:57,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,162 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:50:57,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:50:57,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:50:57,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:50:57,170 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:50:57,173 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:50:57,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,214 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.1 percent of original size [2021-11-07 01:50:57,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:50:57,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:50:57,266 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:50:57,268 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:50:57,273 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:50:57,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:50:57,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:50:57,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 102 [2021-11-07 01:50:57,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320035598] [2021-11-07 01:50:58,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 01:50:58,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:50:58,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 01:50:58,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5162, Invalid=5968, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 01:50:58,007 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:58,240 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-11-07 01:50:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 01:50:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 01:50:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:58,249 INFO L225 Difference]: With dead ends: 109 [2021-11-07 01:50:58,249 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 01:50:58,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5162, Invalid=5968, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 01:50:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 01:50:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-07 01:50:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-11-07 01:50:58,285 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 99 [2021-11-07 01:50:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:58,289 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-11-07 01:50:58,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-11-07 01:50:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:50:58,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:58,298 INFO L513 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1] [2021-11-07 01:50:58,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:58,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:58,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:58,525 INFO L85 PathProgramCache]: Analyzing trace with hash -425773986, now seen corresponding path program 7 times [2021-11-07 01:50:58,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:50:58,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994735243] [2021-11-07 01:50:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:58,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:50:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:04,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:51:04,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994735243] [2021-11-07 01:51:04,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994735243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:51:04,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135707782] [2021-11-07 01:51:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:51:04,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:51:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:51:04,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:51:04,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:51:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:05,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-07 01:51:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:06,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135707782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:07,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822724975] [2021-11-07 01:51:07,592 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-07 01:51:07,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:51:07,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:51:07,593 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:51:07,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:51:07,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:51:07,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-11-07 01:51:07,602 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:51:07,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-07 01:51:07,606 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-11-07 01:51:07,610 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_14|], 10=[|v_#valid_15|]} [2021-11-07 01:51:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:07,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 01:51:07,617 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:51:07,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-11-07 01:51:07,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:51:07,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 01:51:07,679 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,680 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:51:07,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:51:07,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:51:07,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:51:07,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-11-07 01:51:07,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:51:07,691 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:102, output treesize:87 [2021-11-07 01:51:07,696 INFO L180 QuantifierPusher]: treesize reduction 19, result has 82.2 percent of original size [2021-11-07 01:51:07,698 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-11-07 01:51:07,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,746 INFO L180 QuantifierPusher]: treesize reduction 18, result has 92.1 percent of original size [2021-11-07 01:51:07,751 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 206 [2021-11-07 01:51:07,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:07,797 INFO L180 QuantifierPusher]: treesize reduction 24, result has 63.6 percent of original size [2021-11-07 01:51:07,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-11-07 01:51:07,805 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:51:08,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:51:08,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:51:08,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104, 104] total 105 [2021-11-07 01:51:08,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204215369] [2021-11-07 01:51:08,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 01:51:08,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:51:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 01:51:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11553, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 01:51:08,976 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:14,080 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-11-07 01:51:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 01:51:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 01:51:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:14,090 INFO L225 Difference]: With dead ends: 110 [2021-11-07 01:51:14,091 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 01:51:14,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 305 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=224, Invalid=11766, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 01:51:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 01:51:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-07 01:51:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-11-07 01:51:14,129 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2021-11-07 01:51:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:14,131 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-11-07 01:51:14,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-11-07 01:51:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:51:14,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:14,138 INFO L513 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1] [2021-11-07 01:51:14,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:14,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:51:14,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash -314675012, now seen corresponding path program 8 times [2021-11-07 01:51:14,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:51:14,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186577760] [2021-11-07 01:51:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:14,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:51:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:19,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:51:19,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186577760] [2021-11-07 01:51:19,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186577760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:19,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:19,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-11-07 01:51:19,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995150385] [2021-11-07 01:51:19,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 01:51:19,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:51:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 01:51:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 01:51:19,207 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:19,636 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-11-07 01:51:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 01:51:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:51:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:19,638 INFO L225 Difference]: With dead ends: 107 [2021-11-07 01:51:19,638 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:51:19,639 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 01:51:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:51:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:51:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:51:19,640 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-11-07 01:51:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:51:19,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:51:19,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:51:19,644 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:51:19,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-07 01:51:19,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:51:19,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:19,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:51:23,489 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 01:51:23,492 INFO L853 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~i~0 32) (<= ULTIMATE.start_main_~j~0 64) (<= 64 ULTIMATE.start_main_~j~0) (<= 32 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 67) (<= 67 ULTIMATE.start_main_~i~0) (<= 134 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 134)) (and (<= ULTIMATE.start_main_~i~0 24) (<= 48 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 48) (<= 24 ULTIMATE.start_main_~i~0)) (and (<= 38 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 38) (<= 19 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 19)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 16) (<= ULTIMATE.start_main_~i~0 8) (<= 16 ULTIMATE.start_main_~j~0)) (and (<= 114 ULTIMATE.start_main_~j~0) (<= 57 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 114) (<= ULTIMATE.start_main_~i~0 57)) (and (<= ULTIMATE.start_main_~j~0 128) (<= 128 ULTIMATE.start_main_~j~0) (<= 64 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 64)) (and (<= ULTIMATE.start_main_~j~0 52) (<= 26 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 26) (<= 52 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 178) (<= 178 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 89) (<= 89 ULTIMATE.start_main_~i~0)) (and (<= 28 ULTIMATE.start_main_~j~0) (<= 14 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 28) (<= ULTIMATE.start_main_~i~0 14)) (and (<= 60 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 60) (<= ULTIMATE.start_main_~j~0 120) (<= 120 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 69) (<= ULTIMATE.start_main_~j~0 138) (<= 69 ULTIMATE.start_main_~i~0) (<= 138 ULTIMATE.start_main_~j~0)) (and (<= 198 ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 100) (<= ULTIMATE.start_main_~j~0 198) (<= 99 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 172) (<= ULTIMATE.start_main_~i~0 86) (<= 86 ULTIMATE.start_main_~i~0) (<= 172 ULTIMATE.start_main_~j~0)) (and (<= 148 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 74) (<= ULTIMATE.start_main_~j~0 148) (<= 74 ULTIMATE.start_main_~i~0)) (and (<= 136 ULTIMATE.start_main_~j~0) (<= 68 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 68) (<= ULTIMATE.start_main_~j~0 136)) (and (<= ULTIMATE.start_main_~j~0 20) (<= ULTIMATE.start_main_~i~0 10) (<= 10 ULTIMATE.start_main_~i~0) (<= 20 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 46) (<= 92 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 92) (<= 46 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 102) (<= 102 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 51) (<= 51 ULTIMATE.start_main_~i~0)) (and (<= 56 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 56) (<= ULTIMATE.start_main_~j~0 112) (<= 112 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 108) (<= ULTIMATE.start_main_~i~0 54) (<= 108 ULTIMATE.start_main_~j~0) (<= 54 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 44) (<= ULTIMATE.start_main_~j~0 88) (<= 44 ULTIMATE.start_main_~i~0) (<= 88 ULTIMATE.start_main_~j~0)) (and (<= 190 ULTIMATE.start_main_~j~0) (<= 95 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 96) (<= ULTIMATE.start_main_~j~0 190)) (and (<= 75 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 150) (<= ULTIMATE.start_main_~i~0 75) (<= 150 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 91) (<= 182 ULTIMATE.start_main_~j~0) (<= 91 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 182)) (and (<= 6 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 12) (<= ULTIMATE.start_main_~i~0 6) (<= 12 ULTIMATE.start_main_~j~0)) (and (<= 188 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 94) (<= ULTIMATE.start_main_~j~0 188) (<= 94 ULTIMATE.start_main_~i~0)) (and (<= 180 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 180) (<= 90 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 90)) (and (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 10) (<= 10 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 84) (<= 84 ULTIMATE.start_main_~j~0) (<= 42 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 42)) (and (<= ULTIMATE.start_main_~i~0 11) (<= 22 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 22) (<= 11 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 84) (<= 168 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 168) (<= 84 ULTIMATE.start_main_~i~0)) (and (<= 66 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 33) (<= ULTIMATE.start_main_~j~0 66) (<= 33 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 85) (<= ULTIMATE.start_main_~j~0 170) (<= 85 ULTIMATE.start_main_~i~0) (<= 170 ULTIMATE.start_main_~j~0)) (and (<= 34 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 17) (<= ULTIMATE.start_main_~j~0 34) (<= 17 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 122) (<= 61 ULTIMATE.start_main_~i~0) (<= 122 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 61)) (and (<= 72 ULTIMATE.start_main_~j~0) (<= 36 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 72) (<= ULTIMATE.start_main_~i~0 36)) (and (<= 174 ULTIMATE.start_main_~j~0) (<= 87 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 87) (<= ULTIMATE.start_main_~j~0 174)) (and (<= ULTIMATE.start_main_~i~0 70) (<= 140 ULTIMATE.start_main_~j~0) (<= 70 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 140)) (and (<= 38 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 38) (<= ULTIMATE.start_main_~j~0 76) (<= 76 ULTIMATE.start_main_~j~0)) (and (<= 194 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 194) (<= 97 ULTIMATE.start_main_~i~0) (< ULTIMATE.start_main_~i~0 98)) (and (<= ULTIMATE.start_main_~j~0 14) (<= ULTIMATE.start_main_~i~0 7) (<= 14 ULTIMATE.start_main_~j~0) (<= 7 ULTIMATE.start_main_~i~0)) (and (<= 82 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 82) (<= 164 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 164)) (and (<= 73 ULTIMATE.start_main_~i~0) (<= 146 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 73) (<= ULTIMATE.start_main_~j~0 146)) (and (<= ULTIMATE.start_main_~i~0 1) (<= 2 ULTIMATE.start_main_~j~0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 2)) (and (<= ULTIMATE.start_main_~j~0 26) (<= 13 ULTIMATE.start_main_~i~0) (<= 26 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 13)) (and (<= 2 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~j~0 4)) (and (<= 130 ULTIMATE.start_main_~j~0) (<= 65 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 65) (<= ULTIMATE.start_main_~j~0 130)) (and (<= ULTIMATE.start_main_~j~0 142) (<= 142 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 71) (<= 71 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 110) (<= 110 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 55) (<= 55 ULTIMATE.start_main_~i~0)) (and (<= 24 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 24) (<= ULTIMATE.start_main_~i~0 12) (<= 12 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 86) (<= 86 ULTIMATE.start_main_~j~0) (<= 43 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 43)) (and (<= ULTIMATE.start_main_~i~0 34) (<= 34 ULTIMATE.start_main_~i~0) (<= 68 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 68)) (and (<= ULTIMATE.start_main_~i~0 20) (<= 20 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 40) (<= 40 ULTIMATE.start_main_~j~0)) (and (<= 41 ULTIMATE.start_main_~i~0) (<= 82 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 41) (<= ULTIMATE.start_main_~j~0 82)) (and (<= ULTIMATE.start_main_~j~0 106) (<= ULTIMATE.start_main_~i~0 53) (<= 53 ULTIMATE.start_main_~i~0) (<= 106 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 50) (<= ULTIMATE.start_main_~j~0 100) (<= 100 ULTIMATE.start_main_~j~0) (<= 50 ULTIMATE.start_main_~i~0)) (and (<= 45 ULTIMATE.start_main_~i~0) (<= 90 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 90) (<= ULTIMATE.start_main_~i~0 45)) (and (<= ULTIMATE.start_main_~j~0 62) (<= 31 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 31) (<= 62 ULTIMATE.start_main_~j~0)) (and (< ULTIMATE.start_main_~i~0 97) (<= 192 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 192) (<= 96 ULTIMATE.start_main_~i~0)) (and (<= 80 ULTIMATE.start_main_~i~0) (<= 160 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 160) (<= ULTIMATE.start_main_~i~0 80)) (and (<= 32 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 16) (<= ULTIMATE.start_main_~j~0 32) (<= 16 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 79) (<= 158 ULTIMATE.start_main_~j~0) (<= 79 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 158)) (and (<= ULTIMATE.start_main_~j~0 74) (<= ULTIMATE.start_main_~i~0 37) (<= 74 ULTIMATE.start_main_~j~0) (<= 37 ULTIMATE.start_main_~i~0)) (and (<= 154 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 77) (<= 77 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 154)) (and (<= 80 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 80) (<= 40 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 40)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6) (<= ULTIMATE.start_main_~i~0 3) (<= 6 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 78) (<= ULTIMATE.start_main_~j~0 156) (<= 156 ULTIMATE.start_main_~j~0) (<= 78 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 42) (<= 42 ULTIMATE.start_main_~j~0) (<= 21 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 21)) (and (<= ULTIMATE.start_main_~j~0 116) (<= 116 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 58) (<= 58 ULTIMATE.start_main_~i~0)) (and (<= 162 ULTIMATE.start_main_~j~0) (<= 81 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 81) (<= ULTIMATE.start_main_~j~0 162)) (and (<= ULTIMATE.start_main_~i~0 29) (<= 58 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 58) (<= 29 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 83) (<= 83 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 166) (<= 166 ULTIMATE.start_main_~j~0)) (and (<= 96 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 96) (<= 48 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 48)) (and (<= ULTIMATE.start_main_~j~0 186) (<= 186 ULTIMATE.start_main_~j~0) (<= 93 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 93)) (and (<= 44 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 22) (<= ULTIMATE.start_main_~j~0 44) (<= 22 ULTIMATE.start_main_~i~0)) (and (<= 46 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 46) (<= 23 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 23)) (and (<= 36 ULTIMATE.start_main_~j~0) (<= 18 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 36) (<= ULTIMATE.start_main_~i~0 18)) (and (<= ULTIMATE.start_main_~j~0 70) (<= ULTIMATE.start_main_~i~0 35) (<= 35 ULTIMATE.start_main_~i~0) (<= 70 ULTIMATE.start_main_~j~0)) (and (<= 78 ULTIMATE.start_main_~j~0) (<= 39 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 39) (<= ULTIMATE.start_main_~j~0 78)) (and (< ULTIMATE.start_main_~i~0 99) (<= 98 ULTIMATE.start_main_~i~0) (<= 196 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 196)) (and (<= 54 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 27) (<= 27 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 54)) (and (<= ULTIMATE.start_main_~i~0 66) (<= 132 ULTIMATE.start_main_~j~0) (<= 66 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 132)) (and (<= 15 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 15) (<= 30 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 30)) (and (<= 144 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 144) (<= 72 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 72)) (and (<= ULTIMATE.start_main_~j~0 184) (<= ULTIMATE.start_main_~i~0 92) (<= 184 ULTIMATE.start_main_~j~0) (<= 92 ULTIMATE.start_main_~i~0)) (and (<= 49 ULTIMATE.start_main_~i~0) (<= 98 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 98) (<= ULTIMATE.start_main_~i~0 49)) (and (<= ULTIMATE.start_main_~i~0 76) (<= ULTIMATE.start_main_~j~0 152) (<= 152 ULTIMATE.start_main_~j~0) (<= 76 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 126) (<= ULTIMATE.start_main_~i~0 63) (<= 63 ULTIMATE.start_main_~i~0) (<= 126 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 0) (<= 0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 0) (<= 0 ULTIMATE.start_main_~j~0)) (and (<= 118 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 59) (<= 59 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 118)) (and (<= ULTIMATE.start_main_~i~0 88) (<= 88 ULTIMATE.start_main_~i~0) (<= 176 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 176)) (and (<= 4 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 8) (<= ULTIMATE.start_main_~i~0 4)) (and (<= 104 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 104) (<= 52 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 52)) (and (<= 50 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 50) (<= ULTIMATE.start_main_~i~0 25) (<= 25 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 28) (<= 28 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 56) (<= 56 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 9) (<= 18 ULTIMATE.start_main_~j~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 18)) (and (<= 30 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 30) (<= 60 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 60)) (and (<= 94 ULTIMATE.start_main_~j~0) (<= 47 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 94) (<= ULTIMATE.start_main_~i~0 47)) (and (< 199 ULTIMATE.start_main_~j~0) (<= 100 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 200)) (and (<= 62 ULTIMATE.start_main_~i~0) (<= 124 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 124) (<= ULTIMATE.start_main_~i~0 62))) [2021-11-07 01:51:23,493 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-07 01:51:23,493 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 01:51:23,493 INFO L860 garLoopResultBuilder]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-11-07 01:51:23,493 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-11-07 01:51:23,494 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-11-07 01:51:23,494 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-07 01:51:23,494 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-11-07 01:51:23,498 INFO L731 BasicCegarLoop]: Path program histogram: [8, 1] [2021-11-07 01:51:23,500 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:51:23,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:51:23 BoogieIcfgContainer [2021-11-07 01:51:23,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:51:23,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:51:23,585 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:51:23,585 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:51:23,586 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:50:35" (3/4) ... [2021-11-07 01:51:23,590 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:51:23,602 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-07 01:51:23,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-07 01:51:23,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:51:23,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:51:23,653 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:51:23,654 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:51:23,655 INFO L168 Benchmark]: Toolchain (without parser) took 49276.88 ms. Allocated memory was 94.4 MB in the beginning and 180.4 MB in the end (delta: 86.0 MB). Free memory was 59.4 MB in the beginning and 73.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 72.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:23,655 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 66.0 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:51:23,656 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.08 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 69.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:23,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.26 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:51:23,656 INFO L168 Benchmark]: Boogie Preprocessor took 44.28 ms. Allocated memory is still 94.4 MB. Free memory was 68.4 MB in the beginning and 67.5 MB in the end (delta: 828.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:51:23,657 INFO L168 Benchmark]: RCFGBuilder took 500.90 ms. Allocated memory is still 94.4 MB. Free memory was 67.5 MB in the beginning and 57.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:23,663 INFO L168 Benchmark]: TraceAbstraction took 48223.87 ms. Allocated memory was 94.4 MB in the beginning and 180.4 MB in the end (delta: 86.0 MB). Free memory was 57.1 MB in the beginning and 76.8 MB in the end (delta: -19.7 MB). Peak memory consumption was 111.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:23,663 INFO L168 Benchmark]: Witness Printer took 68.86 ms. Allocated memory is still 180.4 MB. Free memory was 75.7 MB in the beginning and 73.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:51:23,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 66.0 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 385.08 ms. Allocated memory is still 94.4 MB. Free memory was 59.4 MB in the beginning and 69.6 MB in the end (delta: -10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.26 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.28 ms. Allocated memory is still 94.4 MB. Free memory was 68.4 MB in the beginning and 67.5 MB in the end (delta: 828.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 500.90 ms. Allocated memory is still 94.4 MB. Free memory was 67.5 MB in the beginning and 57.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 48223.87 ms. Allocated memory was 94.4 MB in the beginning and 180.4 MB in the end (delta: 86.0 MB). Free memory was 57.1 MB in the beginning and 76.8 MB in the end (delta: -19.7 MB). Peak memory consumption was 111.6 MB. Max. memory is 16.1 GB. * Witness Printer took 68.86 ms. Allocated memory is still 180.4 MB. Free memory was 75.7 MB in the beginning and 73.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.0s, OverallIterations: 9, TraceHistogramMax: 101, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 1 SDslu, 262 SDs, 0 SdLazy, 11446 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1328 GetRequests, 812 SyntacticMatches, 6 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 25.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=8, InterpolantAutomatonStates: 498, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 104 NumberOfFragments, 1312 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 2 FomulaSimplificationsInter, 264 FormulaSimplificationTreeSizeReductionInter, 3.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 735 NumberOfCodeBlocks, 735 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 4151 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1672 ConjunctsInSsa, 394 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/37896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((i <= 32 && j <= 64) && 64 <= j) && 32 <= i) || (((i <= 67 && 67 <= i) && 134 <= j) && j <= 134)) || (((i <= 24 && 48 <= j) && j <= 48) && 24 <= i)) || (((38 <= j && j <= 38) && 19 <= i) && i <= 19)) || (((8 <= i && j <= 16) && i <= 8) && 16 <= j)) || (((114 <= j && 57 <= i) && j <= 114) && i <= 57)) || (((j <= 128 && 128 <= j) && 64 <= i) && i <= 64)) || (((j <= 52 && 26 <= i) && i <= 26) && 52 <= j)) || (((j <= 178 && 178 <= j) && i <= 89) && 89 <= i)) || (((28 <= j && 14 <= i) && j <= 28) && i <= 14)) || (((60 <= i && i <= 60) && j <= 120) && 120 <= j)) || (((i <= 69 && j <= 138) && 69 <= i) && 138 <= j)) || (((198 <= j && i < 100) && j <= 198) && 99 <= i)) || (((j <= 172 && i <= 86) && 86 <= i) && 172 <= j)) || (((148 <= j && i <= 74) && j <= 148) && 74 <= i)) || (((136 <= j && 68 <= i) && i <= 68) && j <= 136)) || (((j <= 20 && i <= 10) && 10 <= i) && 20 <= j)) || (((i <= 46 && 92 <= j) && j <= 92) && 46 <= i)) || (((j <= 102 && 102 <= j) && i <= 51) && 51 <= i)) || (((56 <= i && i <= 56) && j <= 112) && 112 <= j)) || (((j <= 108 && i <= 54) && 108 <= j) && 54 <= i)) || (((i <= 44 && j <= 88) && 44 <= i) && 88 <= j)) || (((190 <= j && 95 <= i) && i < 96) && j <= 190)) || (((75 <= i && j <= 150) && i <= 75) && 150 <= j)) || (((i <= 91 && 182 <= j) && 91 <= i) && j <= 182)) || (((6 <= i && j <= 12) && i <= 6) && 12 <= j)) || (((188 <= j && i <= 94) && j <= 188) && 94 <= i)) || (((180 <= j && j <= 180) && 90 <= i) && i <= 90)) || (((5 <= i && i <= 5) && j <= 10) && 10 <= j)) || (((j <= 84 && 84 <= j) && 42 <= i) && i <= 42)) || (((i <= 11 && 22 <= j) && j <= 22) && 11 <= i)) || (((i <= 84 && 168 <= j) && j <= 168) && 84 <= i)) || (((66 <= j && i <= 33) && j <= 66) && 33 <= i)) || (((i <= 85 && j <= 170) && 85 <= i) && 170 <= j)) || (((34 <= j && i <= 17) && j <= 34) && 17 <= i)) || (((j <= 122 && 61 <= i) && 122 <= j) && i <= 61)) || (((72 <= j && 36 <= i) && j <= 72) && i <= 36)) || (((174 <= j && 87 <= i) && i <= 87) && j <= 174)) || (((i <= 70 && 140 <= j) && 70 <= i) && j <= 140)) || (((38 <= i && i <= 38) && j <= 76) && 76 <= j)) || (((194 <= j && j <= 194) && 97 <= i) && i < 98)) || (((j <= 14 && i <= 7) && 14 <= j) && 7 <= i)) || (((82 <= i && i <= 82) && 164 <= j) && j <= 164)) || (((73 <= i && 146 <= j) && i <= 73) && j <= 146)) || (((i <= 1 && 2 <= j) && 1 <= i) && j <= 2)) || (((j <= 26 && 13 <= i) && 26 <= j) && i <= 13)) || (((2 <= i && 4 <= j) && i <= 2) && j <= 4)) || (((130 <= j && 65 <= i) && i <= 65) && j <= 130)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((24 <= j && j <= 24) && i <= 12) && 12 <= i)) || (((j <= 86 && 86 <= j) && 43 <= i) && i <= 43)) || (((i <= 34 && 34 <= i) && 68 <= j) && j <= 68)) || (((i <= 20 && 20 <= i) && j <= 40) && 40 <= j)) || (((41 <= i && 82 <= j) && i <= 41) && j <= 82)) || (((j <= 106 && i <= 53) && 53 <= i) && 106 <= j)) || (((i <= 50 && j <= 100) && 100 <= j) && 50 <= i)) || (((45 <= i && 90 <= j) && j <= 90) && i <= 45)) || (((j <= 62 && 31 <= i) && i <= 31) && 62 <= j)) || (((i < 97 && 192 <= j) && j <= 192) && 96 <= i)) || (((80 <= i && 160 <= j) && j <= 160) && i <= 80)) || (((32 <= j && i <= 16) && j <= 32) && 16 <= i)) || (((i <= 79 && 158 <= j) && 79 <= i) && j <= 158)) || (((j <= 74 && i <= 37) && 74 <= j) && 37 <= i)) || (((154 <= j && i <= 77) && 77 <= i) && j <= 154)) || (((80 <= j && j <= 80) && 40 <= i) && i <= 40)) || (((3 <= i && j <= 6) && i <= 3) && 6 <= j)) || (((i <= 78 && j <= 156) && 156 <= j) && 78 <= i)) || (((j <= 42 && 42 <= j) && 21 <= i) && i <= 21)) || (((j <= 116 && 116 <= j) && i <= 58) && 58 <= i)) || (((162 <= j && 81 <= i) && i <= 81) && j <= 162)) || (((i <= 29 && 58 <= j) && j <= 58) && 29 <= i)) || (((i <= 83 && 83 <= i) && j <= 166) && 166 <= j)) || (((96 <= j && j <= 96) && 48 <= i) && i <= 48)) || (((j <= 186 && 186 <= j) && 93 <= i) && i <= 93)) || (((44 <= j && i <= 22) && j <= 44) && 22 <= i)) || (((46 <= j && j <= 46) && 23 <= i) && i <= 23)) || (((36 <= j && 18 <= i) && j <= 36) && i <= 18)) || (((j <= 70 && i <= 35) && 35 <= i) && 70 <= j)) || (((78 <= j && 39 <= i) && i <= 39) && j <= 78)) || (((i < 99 && 98 <= i) && 196 <= j) && j <= 196)) || (((54 <= j && i <= 27) && 27 <= i) && j <= 54)) || (((i <= 66 && 132 <= j) && 66 <= i) && j <= 132)) || (((15 <= i && i <= 15) && 30 <= j) && j <= 30)) || (((144 <= j && j <= 144) && 72 <= i) && i <= 72)) || (((j <= 184 && i <= 92) && 184 <= j) && 92 <= i)) || (((49 <= i && 98 <= j) && j <= 98) && i <= 49)) || (((i <= 76 && j <= 152) && 152 <= j) && 76 <= i)) || (((j <= 126 && i <= 63) && 63 <= i) && 126 <= j)) || (((j <= 0 && 0 <= i) && i <= 0) && 0 <= j)) || (((118 <= j && i <= 59) && 59 <= i) && j <= 118)) || (((i <= 88 && 88 <= i) && 176 <= j) && j <= 176)) || (((4 <= i && 8 <= j) && j <= 8) && i <= 4)) || (((104 <= j && j <= 104) && 52 <= i) && i <= 52)) || (((50 <= j && j <= 50) && i <= 25) && 25 <= i)) || (((i <= 28 && 28 <= i) && j <= 56) && 56 <= j)) || (((i <= 9 && 18 <= j) && 9 <= i) && j <= 18)) || (((30 <= i && i <= 30) && 60 <= j) && j <= 60)) || (((94 <= j && 47 <= i) && j <= 94) && i <= 47)) || ((199 < j && 100 <= i) && j <= 200)) || (((62 <= i && 124 <= j) && j <= 124) && i <= 62) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-07 01:51:23,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ae91287-c392-4691-a1bd-1de4b351fb04/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE