./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label54.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl --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 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:54:59,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:54:59,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:54:59,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:54:59,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:54:59,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:54:59,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:54:59,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:54:59,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:54:59,740 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:54:59,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:54:59,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:54:59,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:54:59,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:54:59,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:54:59,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:54:59,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:54:59,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:54:59,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:54:59,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:54:59,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:54:59,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:54:59,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:54:59,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:54:59,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:54:59,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:54:59,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:54:59,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:54:59,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:54:59,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:54:59,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:54:59,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:54:59,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:54:59,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:54:59,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:54:59,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:54:59,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:54:59,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:54:59,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:54:59,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:54:59,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:54:59,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:54:59,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:54:59,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:54:59,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:54:59,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:54:59,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:54:59,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:54:59,816 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:54:59,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:54:59,816 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:54:59,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:54:59,817 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:54:59,817 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:54:59,818 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:54:59,818 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:54:59,818 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:54:59,818 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:54:59,819 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:54:59,819 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:54:59,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:54:59,820 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:54:59,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:54:59,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:54:59,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:54:59,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:54:59,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:54:59,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:54:59,822 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:54:59,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:54:59,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:54:59,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:54:59,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:54:59,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:54:59,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:54:59,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:54:59,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:54:59,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:54:59,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:54:59,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:54:59,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:54:59,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:54:59,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:54:59,826 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_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe [2021-11-23 16:55:00,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:55:00,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:55:00,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:55:00,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:55:00,142 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:55:00,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-11-23 16:55:00,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/6070e15a3/a730023b7446434593de33b3e9ab3951/FLAG876fec5cf [2021-11-23 16:55:01,105 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:55:01,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-11-23 16:55:01,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/6070e15a3/a730023b7446434593de33b3e9ab3951/FLAG876fec5cf [2021-11-23 16:55:01,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/6070e15a3/a730023b7446434593de33b3e9ab3951 [2021-11-23 16:55:01,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:55:01,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:55:01,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:55:01,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:55:01,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:55:01,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:55:01" (1/1) ... [2021-11-23 16:55:01,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac945dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:01, skipping insertion in model container [2021-11-23 16:55:01,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:55:01" (1/1) ... [2021-11-23 16:55:01,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:55:01,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:55:01,614 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c[2072,2085] [2021-11-23 16:55:02,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:55:02,576 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:55:02,611 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c[2072,2085] [2021-11-23 16:55:03,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:55:03,061 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:55:03,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03 WrapperNode [2021-11-23 16:55:03,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:55:03,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:55:03,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:55:03,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:55:03,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,521 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 16:55:03,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:55:03,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:55:03,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:55:03,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:55:03,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:03,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:04,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:55:04,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:55:04,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:55:04,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:55:04,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:03" (1/1) ... [2021-11-23 16:55:04,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:55:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:55:04,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:55:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:55:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:55:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:55:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:55:04,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:55:04,223 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:55:04,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:55:08,909 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:55:08,959 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:55:08,966 INFO L158 Benchmark]: Toolchain (without parser) took 7783.47ms. Allocated memory was 109.1MB in the beginning and 394.3MB in the end (delta: 285.2MB). Free memory was 61.3MB in the beginning and 201.8MB in the end (delta: -140.6MB). Peak memory consumption was 158.2MB. Max. memory is 16.1GB. [2021-11-23 16:55:08,966 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:55:08,968 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1878.96ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 61.1MB in the beginning and 61.9MB in the end (delta: -808.2kB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. [2021-11-23 16:55:08,969 INFO L158 Benchmark]: Boogie Procedure Inliner took 459.03ms. Allocated memory was 134.2MB in the beginning and 197.1MB in the end (delta: 62.9MB). Free memory was 61.9MB in the beginning and 111.6MB in the end (delta: -49.8MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2021-11-23 16:55:08,970 INFO L158 Benchmark]: Boogie Preprocessor took 505.42ms. Allocated memory is still 197.1MB. Free memory was 111.6MB in the beginning and 92.9MB in the end (delta: 18.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 16:55:08,971 INFO L158 Benchmark]: RCFGBuilder took 4933.57ms. Allocated memory was 197.1MB in the beginning and 394.3MB in the end (delta: 197.1MB). Free memory was 92.9MB in the beginning and 201.8MB in the end (delta: -108.9MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. [2021-11-23 16:55:08,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1878.96ms. Allocated memory was 109.1MB in the beginning and 134.2MB in the end (delta: 25.2MB). Free memory was 61.1MB in the beginning and 61.9MB in the end (delta: -808.2kB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 459.03ms. Allocated memory was 134.2MB in the beginning and 197.1MB in the end (delta: 62.9MB). Free memory was 61.9MB in the beginning and 111.6MB in the end (delta: -49.8MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 505.42ms. Allocated memory is still 197.1MB. Free memory was 111.6MB in the beginning and 92.9MB in the end (delta: 18.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * RCFGBuilder took 4933.57ms. Allocated memory was 197.1MB in the beginning and 394.3MB in the end (delta: 197.1MB). Free memory was 92.9MB in the beginning and 201.8MB in the end (delta: -108.9MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:55:09,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label54.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl --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 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:55:11,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:55:11,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:55:11,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:55:11,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:55:11,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:55:11,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:55:11,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:55:11,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:55:11,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:55:11,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:55:11,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:55:11,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:55:11,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:55:11,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:55:11,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:55:11,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:55:11,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:55:11,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:55:11,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:55:11,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:55:11,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:55:11,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:55:11,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:55:11,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:55:11,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:55:11,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:55:11,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:55:11,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:55:11,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:55:11,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:55:11,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:55:11,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:55:11,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:55:11,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:55:11,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:55:11,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:55:11,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:55:11,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:55:11,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:55:11,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:55:11,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:55:12,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:55:12,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:55:12,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:55:12,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:55:12,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:55:12,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:55:12,005 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:55:12,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:55:12,006 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:55:12,006 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:55:12,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:55:12,008 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:55:12,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:55:12,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:55:12,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:55:12,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:55:12,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:55:12,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:55:12,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:55:12,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:55:12,012 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:55:12,012 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:55:12,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:55:12,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:55:12,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:55:12,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:55:12,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:55:12,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:55:12,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:55:12,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:55:12,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:55:12,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:55:12,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:55:12,016 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:55:12,016 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:55:12,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:55:12,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:55:12,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:55:12,017 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11e41592a4a90a36b9d41c817b9251e7ae28a6a8e3ac5da0511d1aedc7736ffe [2021-11-23 16:55:12,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:55:12,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:55:12,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:55:12,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:55:12,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:55:12,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-11-23 16:55:12,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/cb5d0b5a3/8252086d7eb545319706ffbcbbda2376/FLAGb0cd49b06 [2021-11-23 16:55:13,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:55:13,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c [2021-11-23 16:55:13,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/cb5d0b5a3/8252086d7eb545319706ffbcbbda2376/FLAGb0cd49b06 [2021-11-23 16:55:13,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/data/cb5d0b5a3/8252086d7eb545319706ffbcbbda2376 [2021-11-23 16:55:13,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:55:13,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:55:13,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:55:13,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:55:13,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:55:13,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:55:13" (1/1) ... [2021-11-23 16:55:13,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184c5e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:13, skipping insertion in model container [2021-11-23 16:55:13,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:55:13" (1/1) ... [2021-11-23 16:55:13,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:55:13,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:55:13,959 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c[2072,2085] [2021-11-23 16:55:15,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:55:15,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:55:15,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/sv-benchmarks/c/eca-rers2012/Problem17_label54.c[2072,2085] [2021-11-23 16:55:15,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:55:15,900 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:55:15,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15 WrapperNode [2021-11-23 16:55:15,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:55:15,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:55:15,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:55:15,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:55:15,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:15,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,196 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2608 [2021-11-23 16:55:16,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:55:16,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:55:16,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:55:16,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:55:16,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:55:16,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:55:16,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:55:16,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:55:16,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (1/1) ... [2021-11-23 16:55:16,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:55:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:55:16,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:55:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:55:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:55:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:55:16,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:55:16,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:55:16,588 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:55:16,590 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:55:51,850 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:55:51,870 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:55:51,870 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:55:51,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:55:51 BoogieIcfgContainer [2021-11-23 16:55:51,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:55:51,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:55:51,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:55:51,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:55:51,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:55:13" (1/3) ... [2021-11-23 16:55:51,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fdf0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:55:51, skipping insertion in model container [2021-11-23 16:55:51,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:55:15" (2/3) ... [2021-11-23 16:55:51,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fdf0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:55:51, skipping insertion in model container [2021-11-23 16:55:51,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:55:51" (3/3) ... [2021-11-23 16:55:51,883 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label54.c [2021-11-23 16:55:51,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:55:51,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:55:51,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:55:51,974 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:55:51,975 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:55:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:55:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:55:52,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:52,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:55:52,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-11-23 16:55:52,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:52,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301094348] [2021-11-23 16:55:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:52,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:52,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:52,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:55:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:55:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:55:52,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:52,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301094348] [2021-11-23 16:55:52,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301094348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:52,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:52,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:55:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079950475] [2021-11-23 16:55:52,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:52,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:55:52,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:55:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:55:52,435 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:33,076 INFO L93 Difference]: Finished difference Result 1641 states and 3026 transitions. [2021-11-23 16:56:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 16:56:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:33,105 INFO L225 Difference]: With dead ends: 1641 [2021-11-23 16:56:33,105 INFO L226 Difference]: Without dead ends: 974 [2021-11-23 16:56:33,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:33,117 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 472 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:33,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 502 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 40.5s Time] [2021-11-23 16:56:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-23 16:56:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 965. [2021-11-23 16:56:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.553941908713693) internal successors, (1498), 964 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1498 transitions. [2021-11-23 16:56:33,244 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1498 transitions. Word has length 13 [2021-11-23 16:56:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:33,245 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1498 transitions. [2021-11-23 16:56:33,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:56:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1498 transitions. [2021-11-23 16:56:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 16:56:33,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:33,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:56:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:33,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:33,463 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1777517742, now seen corresponding path program 1 times [2021-11-23 16:56:33,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:33,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250447601] [2021-11-23 16:56:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:33,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:33,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:33,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:56:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:56:33,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:33,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:33,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250447601] [2021-11-23 16:56:33,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250447601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:33,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:33,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:56:33,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833337121] [2021-11-23 16:56:33,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:33,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:33,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:33,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:33,972 INFO L87 Difference]: Start difference. First operand 965 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:10,928 INFO L93 Difference]: Finished difference Result 2356 states and 3779 transitions. [2021-11-23 16:57:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:57:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-11-23 16:57:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:10,940 INFO L225 Difference]: With dead ends: 2356 [2021-11-23 16:57:10,940 INFO L226 Difference]: Without dead ends: 1393 [2021-11-23 16:57:10,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:57:10,945 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 392 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:10,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 36.8s Time] [2021-11-23 16:57:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-11-23 16:57:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2021-11-23 16:57:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.3038793103448276) internal successors, (1815), 1392 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1815 transitions. [2021-11-23 16:57:11,007 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1815 transitions. Word has length 80 [2021-11-23 16:57:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:11,008 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1815 transitions. [2021-11-23 16:57:11,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1815 transitions. [2021-11-23 16:57:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 16:57:11,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:11,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:11,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:11,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:57:11,227 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 500598620, now seen corresponding path program 1 times [2021-11-23 16:57:11,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:11,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574710685] [2021-11-23 16:57:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:11,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:11,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:11,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:57:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:57:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:11,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:17,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:57:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574710685] [2021-11-23 16:57:17,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574710685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:17,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1648631527] [2021-11-23 16:57:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:17,470 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:57:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:57:17,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:57:17,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:57:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:17,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:57:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:18,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:21,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1648631527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:57:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088465930] [2021-11-23 16:57:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:57:21,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:57:21,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:57:21,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:57:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:57:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:57:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:22,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:57:27,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088465930] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:57:27,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 16:57:27,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 10 [2021-11-23 16:57:27,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978251137] [2021-11-23 16:57:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:27,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:57:27,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:57:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:57:27,704 INFO L87 Difference]: Start difference. First operand 1393 states and 1815 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:16,249 INFO L93 Difference]: Finished difference Result 4102 states and 5690 transitions. [2021-11-23 17:00:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:00:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-23 17:00:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:16,272 INFO L225 Difference]: With dead ends: 4102 [2021-11-23 17:00:16,272 INFO L226 Difference]: Without dead ends: 2696 [2021-11-23 17:00:16,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:00:16,276 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 876 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:16,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 188 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 168.3s Time] [2021-11-23 17:00:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-23 17:00:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2688. [2021-11-23 17:00:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 1.259769259397097) internal successors, (3385), 2687 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 3385 transitions. [2021-11-23 17:00:16,360 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 3385 transitions. Word has length 83 [2021-11-23 17:00:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:16,361 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 3385 transitions. [2021-11-23 17:00:16,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 3385 transitions. [2021-11-23 17:00:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 17:00:16,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:16,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:16,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:00:16,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:16,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:00:16,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:16,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -841218054, now seen corresponding path program 1 times [2021-11-23 17:00:16,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:16,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095960371] [2021-11-23 17:00:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:16,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:16,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:00:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:00:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:17,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:20,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095960371] [2021-11-23 17:00:20,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095960371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259886734] [2021-11-23 17:00:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:20,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:20,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:20,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:00:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:21,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:21,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:21,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259886734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:21,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:00:21,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:00:21,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579968703] [2021-11-23 17:00:21,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:21,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:21,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:00:21,266 INFO L87 Difference]: Start difference. First operand 2688 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:45,731 INFO L93 Difference]: Finished difference Result 6229 states and 8262 transitions. [2021-11-23 17:00:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:45,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-23 17:00:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:45,766 INFO L225 Difference]: With dead ends: 6229 [2021-11-23 17:00:45,767 INFO L226 Difference]: Without dead ends: 3968 [2021-11-23 17:00:45,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:00:45,772 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 554 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:45,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 742 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2021-11-23 17:00:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-11-23 17:00:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2021-11-23 17:00:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 1.2578774892866145) internal successors, (4990), 3967 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 4990 transitions. [2021-11-23 17:00:45,876 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 4990 transitions. Word has length 96 [2021-11-23 17:00:45,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:45,877 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 4990 transitions. [2021-11-23 17:00:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:00:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 4990 transitions. [2021-11-23 17:00:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-23 17:00:45,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:45,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:45,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:46,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:46,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:46,294 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1294742197, now seen corresponding path program 1 times [2021-11-23 17:00:46,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188588863] [2021-11-23 17:00:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:46,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:46,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:46,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:00:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:00:46,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:00:47,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:00:50,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188588863] [2021-11-23 17:00:50,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188588863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090541196] [2021-11-23 17:00:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:50,882 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:00:50,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:00:50,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:00:50,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:00:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:00:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:00:52,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:00:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:00:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090541196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:00:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059966353] [2021-11-23 17:00:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:56,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:00:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:00:56,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:00:56,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:00:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:00:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:56,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:03,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059966353] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:01:03,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:01:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 6 [2021-11-23 17:01:03,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572886838] [2021-11-23 17:01:03,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:01:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:03,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:01:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:01:03,266 INFO L87 Difference]: Start difference. First operand 3968 states and 4990 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:29,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:43,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:02:59,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:03:20,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:03:53,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:03:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:59,794 INFO L93 Difference]: Finished difference Result 13067 states and 16581 transitions. [2021-11-23 17:03:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:03:59,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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 167 [2021-11-23 17:03:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:59,856 INFO L225 Difference]: With dead ends: 13067 [2021-11-23 17:03:59,857 INFO L226 Difference]: Without dead ends: 8676 [2021-11-23 17:03:59,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:03:59,865 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 962 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:59,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 192 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 176.4s Time] [2021-11-23 17:03:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-11-23 17:04:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6116. [2021-11-23 17:04:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 1.2466067048242029) internal successors, (7623), 6115 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 7623 transitions. [2021-11-23 17:04:00,102 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 7623 transitions. Word has length 167 [2021-11-23 17:04:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:00,104 INFO L470 AbstractCegarLoop]: Abstraction has 6116 states and 7623 transitions. [2021-11-23 17:04:00,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 7623 transitions. [2021-11-23 17:04:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 17:04:00,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:00,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:00,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:00,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:00,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 17:04:00,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:00,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:00,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1663585202, now seen corresponding path program 1 times [2021-11-23 17:04:00,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:00,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567740245] [2021-11-23 17:04:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:00,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:00,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:00,728 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:00,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:04:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:04:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 162 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 162 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:05,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567740245] [2021-11-23 17:04:05,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567740245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:05,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616686586] [2021-11-23 17:04:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:05,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:05,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:05,778 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:05,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:04:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:04:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 162 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:07,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 162 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:11,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1616686586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:11,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020898192] [2021-11-23 17:04:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:11,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:11,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:11,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:11,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:04:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:04:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 162 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:12,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:04:18,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020898192] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:04:18,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:04:18,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 6 [2021-11-23 17:04:18,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441026887] [2021-11-23 17:04:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:18,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:04:18,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:04:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:04:18,586 INFO L87 Difference]: Start difference. First operand 6116 states and 7623 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:04:43,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:50,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:52,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:06,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:11,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:19,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:31,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:56,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:19,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:25,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:47,720 INFO L93 Difference]: Finished difference Result 14369 states and 18033 transitions. [2021-11-23 17:06:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:06:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 241 [2021-11-23 17:06:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:47,764 INFO L225 Difference]: With dead ends: 14369 [2021-11-23 17:06:47,764 INFO L226 Difference]: Without dead ends: 8680 [2021-11-23 17:06:47,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1435 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:06:47,771 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 817 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:47,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 231 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 149.0s Time] [2021-11-23 17:06:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-11-23 17:06:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 7826. [2021-11-23 17:06:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7825 states have (on average 1.2201916932907348) internal successors, (9548), 7825 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 9548 transitions. [2021-11-23 17:06:48,020 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 9548 transitions. Word has length 241 [2021-11-23 17:06:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:48,020 INFO L470 AbstractCegarLoop]: Abstraction has 7826 states and 9548 transitions. [2021-11-23 17:06:48,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:06:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 9548 transitions. [2021-11-23 17:06:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-23 17:06:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:48,025 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:06:48,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:48,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 17:06:48,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:06:48,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:06:48,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash 166050340, now seen corresponding path program 1 times [2021-11-23 17:06:48,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:48,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745615497] [2021-11-23 17:06:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:48,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:48,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:48,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:06:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:06:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 162 proven. 82 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:06:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:06:50,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:50,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745615497] [2021-11-23 17:06:50,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745615497] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:06:50,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:06:50,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:06:50,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275862262] [2021-11-23 17:06:50,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:06:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:06:50,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:06:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:06:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:06:50,967 INFO L87 Difference]: Start difference. First operand 7826 states and 9548 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:08,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:10,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:37,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:44,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:50,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:00,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:21,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:23,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:24,368 INFO L93 Difference]: Finished difference Result 21607 states and 26480 transitions. [2021-11-23 17:08:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 265 [2021-11-23 17:08:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:24,418 INFO L225 Difference]: With dead ends: 21607 [2021-11-23 17:08:24,418 INFO L226 Difference]: Without dead ends: 14207 [2021-11-23 17:08:24,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:24,429 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 445 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:24,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 618 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 93.3s Time] [2021-11-23 17:08:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14207 states. [2021-11-23 17:08:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14207 to 12499. [2021-11-23 17:08:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12499 states, 12498 states have (on average 1.2234757561209793) internal successors, (15291), 12498 states have internal predecessors, (15291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12499 states to 12499 states and 15291 transitions. [2021-11-23 17:08:24,828 INFO L78 Accepts]: Start accepts. Automaton has 12499 states and 15291 transitions. Word has length 265 [2021-11-23 17:08:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 12499 states and 15291 transitions. [2021-11-23 17:08:24,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12499 states and 15291 transitions. [2021-11-23 17:08:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-23 17:08:24,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:24,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:24,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:25,060 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1007968954, now seen corresponding path program 1 times [2021-11-23 17:08:25,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:25,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877753588] [2021-11-23 17:08:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:25,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:25,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:25,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:25,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4227b2-a510-4817-b2bd-741d90fcc37e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:08:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:08:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 309 proven. 82 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 17:08:26,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 17:08:27,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877753588] [2021-11-23 17:08:27,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877753588] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:08:27,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:08:27,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:08:27,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472095863] [2021-11-23 17:08:27,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:27,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:08:27,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:08:27,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:08:27,814 INFO L87 Difference]: Start difference. First operand 12499 states and 15291 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:37,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:40,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:45,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:46,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []