./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.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_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/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_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/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_2bc3d12e-0012-4d12-9dfc-77970906144e/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 18046378c6d1547b773fdd7b2a077336efb6ec59b5b2498774315388e2558fbc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:38,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:38,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:39,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:39,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:39,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:39,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:39,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:39,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:39,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:39,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:39,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:39,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:39,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:39,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:39,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:39,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:39,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:39,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:39,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:39,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:39,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:39,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:39,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:39,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:39,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:39,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:39,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:39,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:39,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:39,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:39,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:39,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:39,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:39,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:39,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:39,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:39,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:39,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:39,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:39,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:39,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:10:39,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:39,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:39,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:39,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:39,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:39,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:39,158 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:39,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:39,159 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:39,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:10:39,160 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:39,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:39,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:10:39,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:10:39,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:39,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:10:39,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:10:39,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:10:39,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:39,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:39,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:10:39,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:39,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:39,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:39,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:39,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:39,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:39,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:39,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:39,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:39,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:39,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:39,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:39,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:39,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:39,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:39,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:10:39,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:10:39,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:39,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:39,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:39,170 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_2bc3d12e-0012-4d12-9dfc-77970906144e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18046378c6d1547b773fdd7b2a077336efb6ec59b5b2498774315388e2558fbc [2021-11-23 17:10:39,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:39,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:39,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:39,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:39,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:39,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2021-11-23 17:10:39,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/a1ccac42a/c29fe90b2c894d89a9e3a4bb3dda0508/FLAGf48a4378b [2021-11-23 17:10:40,741 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:40,742 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2021-11-23 17:10:40,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/a1ccac42a/c29fe90b2c894d89a9e3a4bb3dda0508/FLAGf48a4378b [2021-11-23 17:10:41,181 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/a1ccac42a/c29fe90b2c894d89a9e3a4bb3dda0508 [2021-11-23 17:10:41,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:41,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:41,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:41,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:41,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:41,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:41" (1/1) ... [2021-11-23 17:10:41,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51341497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:41, skipping insertion in model container [2021-11-23 17:10:41,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:41" (1/1) ... [2021-11-23 17:10:41,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:41,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:42,014 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15519,15532] [2021-11-23 17:10:42,145 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22809,22822] [2021-11-23 17:10:43,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:43,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:10:43,470 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15519,15532] [2021-11-23 17:10:43,500 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22809,22822] [2021-11-23 17:10:44,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:10:44,269 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:10:44,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44 WrapperNode [2021-11-23 17:10:44,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:44,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:44,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:10:44,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:10:44,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:44,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:44,851 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5150 [2021-11-23 17:10:44,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:10:44,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:10:44,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:10:44,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:10:44,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:44,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:10:45,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:10:45,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:10:45,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:10:45,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:44" (1/1) ... [2021-11-23 17:10:45,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:45,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:10:45,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:10:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:10:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:10:45,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:10:45,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:10:46,047 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:10:46,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:10:52,104 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:10:52,180 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 17:10:52,186 INFO L158 Benchmark]: Toolchain (without parser) took 10994.01ms. Allocated memory was 104.9MB in the beginning and 478.2MB in the end (delta: 373.3MB). Free memory was 63.1MB in the beginning and 288.0MB in the end (delta: -224.9MB). Peak memory consumption was 249.1MB. Max. memory is 16.1GB. [2021-11-23 17:10:52,187 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 104.9MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:10:52,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3074.42ms. Allocated memory was 104.9MB in the beginning and 161.5MB in the end (delta: 56.6MB). Free memory was 62.9MB in the beginning and 76.5MB in the end (delta: -13.6MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. [2021-11-23 17:10:52,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 580.71ms. Allocated memory was 161.5MB in the beginning and 239.1MB in the end (delta: 77.6MB). Free memory was 76.5MB in the beginning and 116.1MB in the end (delta: -39.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2021-11-23 17:10:52,191 INFO L158 Benchmark]: Boogie Preprocessor took 742.14ms. Allocated memory is still 239.1MB. Free memory was 116.1MB in the beginning and 118.8MB in the end (delta: -2.7MB). Peak memory consumption was 65.8MB. Max. memory is 16.1GB. [2021-11-23 17:10:52,192 INFO L158 Benchmark]: RCFGBuilder took 6587.21ms. Allocated memory was 239.1MB in the beginning and 478.2MB in the end (delta: 239.1MB). Free memory was 118.8MB in the beginning and 288.0MB in the end (delta: -169.2MB). Peak memory consumption was 169.9MB. Max. memory is 16.1GB. [2021-11-23 17:10:52,197 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 104.9MB. Free memory is still 60.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3074.42ms. Allocated memory was 104.9MB in the beginning and 161.5MB in the end (delta: 56.6MB). Free memory was 62.9MB in the beginning and 76.5MB in the end (delta: -13.6MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 580.71ms. Allocated memory was 161.5MB in the beginning and 239.1MB in the end (delta: 77.6MB). Free memory was 76.5MB in the beginning and 116.1MB in the end (delta: -39.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 742.14ms. Allocated memory is still 239.1MB. Free memory was 116.1MB in the beginning and 118.8MB in the end (delta: -2.7MB). Peak memory consumption was 65.8MB. Max. memory is 16.1GB. * RCFGBuilder took 6587.21ms. Allocated memory was 239.1MB in the beginning and 478.2MB in the end (delta: 239.1MB). Free memory was 118.8MB in the beginning and 288.0MB in the end (delta: -169.2MB). Peak memory consumption was 169.9MB. 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 17:10:52,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/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_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/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_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/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_2bc3d12e-0012-4d12-9dfc-77970906144e/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 18046378c6d1547b773fdd7b2a077336efb6ec59b5b2498774315388e2558fbc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:10:55,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:10:55,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:10:55,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:10:55,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:10:55,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:10:55,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:10:55,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:10:55,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:10:55,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:10:55,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:10:55,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:10:55,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:10:55,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:10:55,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:10:55,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:10:55,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:10:55,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:10:55,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:10:55,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:10:55,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:10:55,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:10:55,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:10:55,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:10:55,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:10:55,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:10:55,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:10:55,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:10:55,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:10:55,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:10:55,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:10:55,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:10:55,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:10:55,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:10:55,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:10:55,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:10:55,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:10:55,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:10:55,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:10:55,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:10:55,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:10:55,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:10:55,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:10:55,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:10:55,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:10:55,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:10:55,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:10:55,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:10:55,546 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:10:55,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:10:55,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:10:55,547 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:10:55,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:10:55,548 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:10:55,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:10:55,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:10:55,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:10:55,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:10:55,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:10:55,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:10:55,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:10:55,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:10:55,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:10:55,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:10:55,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:10:55,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:10:55,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:10:55,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:10:55,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:10:55,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:10:55,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:10:55,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:10:55,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:10:55,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:10:55,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:10:55,557 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:10:55,558 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:10:55,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:10:55,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:10:55,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:10:55,559 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_2bc3d12e-0012-4d12-9dfc-77970906144e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18046378c6d1547b773fdd7b2a077336efb6ec59b5b2498774315388e2558fbc [2021-11-23 17:10:55,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:10:56,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:10:56,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:10:56,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:10:56,024 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:10:56,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2021-11-23 17:10:56,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/446671f91/248aa75889694e31a3f39137ea0db3d1/FLAG843a9bb90 [2021-11-23 17:10:57,218 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:10:57,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2021-11-23 17:10:57,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/446671f91/248aa75889694e31a3f39137ea0db3d1/FLAG843a9bb90 [2021-11-23 17:10:57,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/data/446671f91/248aa75889694e31a3f39137ea0db3d1 [2021-11-23 17:10:57,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:10:57,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:10:57,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:10:57,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:10:57,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:10:57,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:57" (1/1) ... [2021-11-23 17:10:57,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b9b786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:10:57, skipping insertion in model container [2021-11-23 17:10:57,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:10:57" (1/1) ... [2021-11-23 17:10:57,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:10:57,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:10:58,568 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15519,15532] [2021-11-23 17:10:58,706 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22809,22822] [2021-11-23 17:11:00,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:11:00,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:11:00,133 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[15519,15532] [2021-11-23 17:11:00,156 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_2bc3d12e-0012-4d12-9dfc-77970906144e/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c[22809,22822] [2021-11-23 17:11:01,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:11:01,132 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:11:01,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01 WrapperNode [2021-11-23 17:11:01,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:11:01,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:11:01,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:11:01,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:11:01,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,570 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5122 [2021-11-23 17:11:01,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:11:01,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:11:01,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:11:01,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:11:01,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:01,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:02,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:11:02,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:11:02,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:11:02,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:11:02,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (1/1) ... [2021-11-23 17:11:02,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:11:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:11:02,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:11:02,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:11:02,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:11:02,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:11:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:11:02,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:11:02,483 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:11:02,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:11:36,935 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:11:36,965 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:11:36,965 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:11:36,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:11:36 BoogieIcfgContainer [2021-11-23 17:11:36,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:11:36,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:11:36,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:11:36,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:11:36,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:10:57" (1/3) ... [2021-11-23 17:11:36,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eea7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:11:36, skipping insertion in model container [2021-11-23 17:11:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:11:01" (2/3) ... [2021-11-23 17:11:36,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15eea7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:11:36, skipping insertion in model container [2021-11-23 17:11:36,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:11:36" (3/3) ... [2021-11-23 17:11:36,982 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals+Problem12_label02.c [2021-11-23 17:11:36,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:11:36,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 17:11:37,065 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:11:37,074 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 17:11:37,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 17:11:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 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 17:11:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:11:37,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:37,136 INFO L514 BasicCegarLoop]: trace histogram [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 17:11:37,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:37,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-11-23 17:11:37,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:37,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504370024] [2021-11-23 17:11:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:37,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:37,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:37,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:11:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:11:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:37,597 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 17:11:37,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:37,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:37,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504370024] [2021-11-23 17:11:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504370024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:37,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:11:37,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:11:37,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412257784] [2021-11-23 17:11:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:37,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:11:37,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:11:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:11:37,705 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 17:11:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:37,860 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2021-11-23 17:11:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:11:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2021-11-23 17:11:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:37,903 INFO L225 Difference]: With dead ends: 1806 [2021-11-23 17:11:37,908 INFO L226 Difference]: Without dead ends: 860 [2021-11-23 17:11:37,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:11:37,925 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:37,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:11:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-23 17:11:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-11-23 17:11:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8881118881118881) internal successors, (1620), 859 states have internal predecessors, (1620), 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 17:11:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2021-11-23 17:11:38,070 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2021-11-23 17:11:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:38,071 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2021-11-23 17:11:38,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 17:11:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2021-11-23 17:11:38,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 17:11:38,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:38,075 INFO L514 BasicCegarLoop]: trace histogram [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 17:11:38,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:38,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:38,277 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:38,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-11-23 17:11:38,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:38,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931816287] [2021-11-23 17:11:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:38,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:38,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:38,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:11:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:11:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:38,610 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 17:11:38,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:38,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931816287] [2021-11-23 17:11:38,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931816287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:38,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:11:38,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:11:38,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726577163] [2021-11-23 17:11:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:38,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:11:38,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:11:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:11:38,617 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 17:11:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:38,821 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2021-11-23 17:11:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:11:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 38 [2021-11-23 17:11:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:38,831 INFO L225 Difference]: With dead ends: 924 [2021-11-23 17:11:38,831 INFO L226 Difference]: Without dead ends: 860 [2021-11-23 17:11:38,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:11:38,834 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:38,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:11:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-23 17:11:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-11-23 17:11:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8414918414918415) internal successors, (1580), 859 states have internal predecessors, (1580), 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 17:11:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2021-11-23 17:11:38,878 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2021-11-23 17:11:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:38,878 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2021-11-23 17:11:38,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 17:11:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2021-11-23 17:11:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 17:11:38,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:38,882 INFO L514 BasicCegarLoop]: trace histogram [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 17:11:38,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:39,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:39,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1423615356, now seen corresponding path program 1 times [2021-11-23 17:11:39,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810518232] [2021-11-23 17:11:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:39,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:39,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:39,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:39,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:11:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:11:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:39,627 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 17:11:39,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:39,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:39,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810518232] [2021-11-23 17:11:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810518232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:39,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:11:39,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:11:39,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223496777] [2021-11-23 17:11:39,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:39,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:11:39,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:11:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:11:39,631 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 17:12:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:23,608 INFO L93 Difference]: Finished difference Result 2364 states and 4453 transitions. [2021-11-23 17:12:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 63 [2021-11-23 17:12:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:23,623 INFO L225 Difference]: With dead ends: 2364 [2021-11-23 17:12:23,624 INFO L226 Difference]: Without dead ends: 1611 [2021-11-23 17:12:23,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 17:12:23,628 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 857 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:23,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 365 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 43.8s Time] [2021-11-23 17:12:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-11-23 17:12:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-11-23 17:12:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.7470478558110627) internal successors, (2811), 1610 states have internal predecessors, (2811), 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 17:12:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2811 transitions. [2021-11-23 17:12:23,689 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2811 transitions. Word has length 63 [2021-11-23 17:12:23,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:23,690 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2811 transitions. [2021-11-23 17:12:23,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 17:12:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2811 transitions. [2021-11-23 17:12:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:12:23,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:23,694 INFO L514 BasicCegarLoop]: trace histogram [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 17:12:23,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:23,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:23,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-11-23 17:12:23,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605949655] [2021-11-23 17:12:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:23,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:23,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:23,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:12:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:24,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:24,390 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 17:12:24,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:24,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:24,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605949655] [2021-11-23 17:12:24,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605949655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:24,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:24,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:24,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68817830] [2021-11-23 17:12:24,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:24,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:24,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:24,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:24,393 INFO L87 Difference]: Start difference. First operand 1611 states and 2811 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 17:12:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:24,449 INFO L93 Difference]: Finished difference Result 1725 states and 2991 transitions. [2021-11-23 17:12:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-23 17:12:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:24,466 INFO L225 Difference]: With dead ends: 1725 [2021-11-23 17:12:24,467 INFO L226 Difference]: Without dead ends: 1665 [2021-11-23 17:12:24,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:12:24,479 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-23 17:12:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-11-23 17:12:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.7423239012642986) internal successors, (2894), 1662 states have internal predecessors, (2894), 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 17:12:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2894 transitions. [2021-11-23 17:12:24,545 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2894 transitions. Word has length 77 [2021-11-23 17:12:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:24,546 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2894 transitions. [2021-11-23 17:12:24,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 17:12:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2894 transitions. [2021-11-23 17:12:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:12:24,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:24,550 INFO L514 BasicCegarLoop]: trace histogram [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 17:12:24,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:24,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:24,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-11-23 17:12:24,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327328695] [2021-11-23 17:12:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:24,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:24,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:24,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:24,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:12:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:24,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:25,340 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 17:12:25,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:25,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:25,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327328695] [2021-11-23 17:12:25,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327328695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:25,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:25,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:25,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482884969] [2021-11-23 17:12:25,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:25,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:25,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:25,344 INFO L87 Difference]: Start difference. First operand 1663 states and 2894 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 17:12:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:25,406 INFO L93 Difference]: Finished difference Result 1875 states and 3230 transitions. [2021-11-23 17:12:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:25,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-23 17:12:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:25,422 INFO L225 Difference]: With dead ends: 1875 [2021-11-23 17:12:25,423 INFO L226 Difference]: Without dead ends: 1763 [2021-11-23 17:12:25,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 17:12:25,425 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-23 17:12:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-11-23 17:12:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.733371233655486) internal successors, (3049), 1760 states have internal predecessors, (3049), 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 17:12:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3049 transitions. [2021-11-23 17:12:25,494 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3049 transitions. Word has length 77 [2021-11-23 17:12:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:25,494 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 3049 transitions. [2021-11-23 17:12:25,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 17:12:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3049 transitions. [2021-11-23 17:12:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:12:25,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:25,497 INFO L514 BasicCegarLoop]: trace histogram [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 17:12:25,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:25,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:25,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-11-23 17:12:25,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:25,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383649751] [2021-11-23 17:12:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:25,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:25,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:25,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:12:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:12:25,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:28,375 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 17:12:28,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:28,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:28,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383649751] [2021-11-23 17:12:28,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383649751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:28,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:28,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:12:28,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290918791] [2021-11-23 17:12:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:28,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:12:28,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:12:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:12:28,380 INFO L87 Difference]: Start difference. First operand 1761 states and 3049 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 17:12:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:28,912 INFO L93 Difference]: Finished difference Result 3231 states and 5380 transitions. [2021-11-23 17:12:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:12:28,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 77 [2021-11-23 17:12:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:28,938 INFO L225 Difference]: With dead ends: 3231 [2021-11-23 17:12:28,939 INFO L226 Difference]: Without dead ends: 3021 [2021-11-23 17:12:28,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:12:28,942 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 5166 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5166 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:28,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5166 Valid, 2138 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:12:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-23 17:12:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2177. [2021-11-23 17:12:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2175 states have (on average 1.701609195402299) internal successors, (3701), 2176 states have internal predecessors, (3701), 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 17:12:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3701 transitions. [2021-11-23 17:12:29,108 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3701 transitions. Word has length 77 [2021-11-23 17:12:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:29,109 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3701 transitions. [2021-11-23 17:12:29,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 17:12:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3701 transitions. [2021-11-23 17:12:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:12:29,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:29,111 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:12:29,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:29,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:29,325 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-11-23 17:12:29,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227274742] [2021-11-23 17:12:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:29,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:29,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:29,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:12:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:29,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:29,830 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 17:12:29,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:29,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227274742] [2021-11-23 17:12:29,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227274742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:29,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:29,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:29,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036291660] [2021-11-23 17:12:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:29,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:29,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:29,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:29,835 INFO L87 Difference]: Start difference. First operand 2177 states and 3701 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:29,942 INFO L93 Difference]: Finished difference Result 3105 states and 5158 transitions. [2021-11-23 17:12:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:12:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:29,966 INFO L225 Difference]: With dead ends: 3105 [2021-11-23 17:12:29,967 INFO L226 Difference]: Without dead ends: 2479 [2021-11-23 17:12:29,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:12:29,971 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:29,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-11-23 17:12:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2477. [2021-11-23 17:12:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2475 states have (on average 1.6816161616161616) internal successors, (4162), 2476 states have internal predecessors, (4162), 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 17:12:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 4162 transitions. [2021-11-23 17:12:30,093 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 4162 transitions. Word has length 79 [2021-11-23 17:12:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:30,093 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 4162 transitions. [2021-11-23 17:12:30,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 4162 transitions. [2021-11-23 17:12:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:12:30,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:30,105 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:12:30,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:30,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:30,321 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-11-23 17:12:30,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:30,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065303790] [2021-11-23 17:12:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:30,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:30,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:30,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:30,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:12:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:30,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:30,703 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 17:12:30,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:30,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065303790] [2021-11-23 17:12:30,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065303790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:30,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:30,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:30,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542248087] [2021-11-23 17:12:30,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:30,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:30,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:30,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:30,706 INFO L87 Difference]: Start difference. First operand 2477 states and 4162 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:30,821 INFO L93 Difference]: Finished difference Result 4217 states and 6870 transitions. [2021-11-23 17:12:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:12:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:30,848 INFO L225 Difference]: With dead ends: 4217 [2021-11-23 17:12:30,848 INFO L226 Difference]: Without dead ends: 3293 [2021-11-23 17:12:30,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:12:30,852 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:30,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-11-23 17:12:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 3291. [2021-11-23 17:12:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3289 states have (on average 1.6439647309212526) internal successors, (5407), 3290 states have internal predecessors, (5407), 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 17:12:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5407 transitions. [2021-11-23 17:12:31,080 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5407 transitions. Word has length 79 [2021-11-23 17:12:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:31,081 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 5407 transitions. [2021-11-23 17:12:31,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5407 transitions. [2021-11-23 17:12:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:12:31,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:31,083 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:12:31,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:31,300 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-11-23 17:12:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:31,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895893653] [2021-11-23 17:12:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:31,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:31,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:31,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:12:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:31,715 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 17:12:31,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:31,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895893653] [2021-11-23 17:12:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895893653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:31,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:31,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:31,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764708759] [2021-11-23 17:12:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:31,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:31,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:31,718 INFO L87 Difference]: Start difference. First operand 3291 states and 5407 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:31,904 INFO L93 Difference]: Finished difference Result 6551 states and 10425 transitions. [2021-11-23 17:12:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:12:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:31,942 INFO L225 Difference]: With dead ends: 6551 [2021-11-23 17:12:31,943 INFO L226 Difference]: Without dead ends: 4813 [2021-11-23 17:12:31,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:12:31,951 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:31,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4813 states. [2021-11-23 17:12:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4813 to 4811. [2021-11-23 17:12:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4809 states have (on average 1.6009565398211687) internal successors, (7699), 4810 states have internal predecessors, (7699), 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 17:12:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 7699 transitions. [2021-11-23 17:12:32,292 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 7699 transitions. Word has length 79 [2021-11-23 17:12:32,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:32,292 INFO L470 AbstractCegarLoop]: Abstraction has 4811 states and 7699 transitions. [2021-11-23 17:12:32,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 7699 transitions. [2021-11-23 17:12:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:12:32,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:32,294 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:12:32,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:32,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:32,516 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:32,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-11-23 17:12:32,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:32,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617350453] [2021-11-23 17:12:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:32,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:32,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:32,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:12:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:32,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:32,923 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 17:12:32,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:32,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:32,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617350453] [2021-11-23 17:12:32,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617350453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:32,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:32,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:32,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96360275] [2021-11-23 17:12:32,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:32,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:32,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:32,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:32,926 INFO L87 Difference]: Start difference. First operand 4811 states and 7699 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:33,241 INFO L93 Difference]: Finished difference Result 10895 states and 16941 transitions. [2021-11-23 17:12:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:12:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:33,302 INFO L225 Difference]: With dead ends: 10895 [2021-11-23 17:12:33,302 INFO L226 Difference]: Without dead ends: 7637 [2021-11-23 17:12:33,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:12:33,311 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:33,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7637 states. [2021-11-23 17:12:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7637 to 7635. [2021-11-23 17:12:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 7633 states have (on average 1.557316913402332) internal successors, (11887), 7634 states have internal predecessors, (11887), 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 17:12:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 11887 transitions. [2021-11-23 17:12:33,817 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 11887 transitions. Word has length 79 [2021-11-23 17:12:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:33,818 INFO L470 AbstractCegarLoop]: Abstraction has 7635 states and 11887 transitions. [2021-11-23 17:12:33,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 11887 transitions. [2021-11-23 17:12:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:12:33,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:33,821 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-23 17:12:33,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:34,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:34,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-11-23 17:12:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486401133] [2021-11-23 17:12:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:34,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:34,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:34,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:12:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:34,450 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 17:12:34,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:34,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486401133] [2021-11-23 17:12:34,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486401133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:34,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:34,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:34,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743765229] [2021-11-23 17:12:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:34,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:34,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:34,453 INFO L87 Difference]: Start difference. First operand 7635 states and 11887 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:34,893 INFO L93 Difference]: Finished difference Result 18935 states and 28785 transitions. [2021-11-23 17:12:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:34,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:12:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:34,929 INFO L225 Difference]: With dead ends: 18935 [2021-11-23 17:12:34,929 INFO L226 Difference]: Without dead ends: 12853 [2021-11-23 17:12:34,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 17:12:34,942 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:34,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12853 states. [2021-11-23 17:12:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12853 to 12851. [2021-11-23 17:12:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12851 states, 12849 states have (on average 1.515370845980232) internal successors, (19471), 12850 states have internal predecessors, (19471), 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 17:12:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12851 states to 12851 states and 19471 transitions. [2021-11-23 17:12:35,661 INFO L78 Accepts]: Start accepts. Automaton has 12851 states and 19471 transitions. Word has length 79 [2021-11-23 17:12:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 12851 states and 19471 transitions. [2021-11-23 17:12:35,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 17:12:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 12851 states and 19471 transitions. [2021-11-23 17:12:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 17:12:35,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:35,664 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-23 17:12:35,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:35,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-11-23 17:12:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:35,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370348623] [2021-11-23 17:12:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:35,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:35,885 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:35,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:12:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:12:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:36,149 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 17:12:36,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:36,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370348623] [2021-11-23 17:12:36,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370348623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:36,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:36,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:12:36,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018344908] [2021-11-23 17:12:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:36,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:12:36,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:12:36,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:12:36,153 INFO L87 Difference]: Start difference. First operand 12851 states and 19471 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 17:12:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:37,472 INFO L93 Difference]: Finished difference Result 22879 states and 33936 transitions. [2021-11-23 17:12:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:12:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 17:12:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:37,533 INFO L225 Difference]: With dead ends: 22879 [2021-11-23 17:12:37,534 INFO L226 Difference]: Without dead ends: 22877 [2021-11-23 17:12:37,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:12:37,541 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 256 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 6345 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:37,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 6345 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:12:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22877 states. [2021-11-23 17:12:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22877 to 13523. [2021-11-23 17:12:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13521 states have (on average 1.4873899859477848) internal successors, (20111), 13522 states have internal predecessors, (20111), 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 17:12:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 20111 transitions. [2021-11-23 17:12:38,505 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 20111 transitions. Word has length 80 [2021-11-23 17:12:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:38,505 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 20111 transitions. [2021-11-23 17:12:38,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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 17:12:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 20111 transitions. [2021-11-23 17:12:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:12:38,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:38,517 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:12:38,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:12:38,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:38,746 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-11-23 17:12:38,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:38,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413168239] [2021-11-23 17:12:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:38,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:38,749 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:12:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:38,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:12:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:42,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413168239] [2021-11-23 17:12:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413168239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1291240662] [2021-11-23 17:12:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:42,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:42,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:42,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:12:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:43,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:43,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1291240662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:43,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:12:43,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:12:43,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280323276] [2021-11-23 17:12:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:43,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:43,182 INFO L87 Difference]: Start difference. First operand 13523 states and 20111 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:43,853 INFO L93 Difference]: Finished difference Result 25495 states and 37505 transitions. [2021-11-23 17:12:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-23 17:12:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:43,885 INFO L225 Difference]: With dead ends: 25495 [2021-11-23 17:12:43,886 INFO L226 Difference]: Without dead ends: 13525 [2021-11-23 17:12:43,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:43,904 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 60 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:43,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2021-11-23 17:12:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 13523. [2021-11-23 17:12:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13521 states have (on average 1.476739886103099) internal successors, (19967), 13522 states have internal predecessors, (19967), 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 17:12:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 19967 transitions. [2021-11-23 17:12:44,770 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 19967 transitions. Word has length 112 [2021-11-23 17:12:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:44,771 INFO L470 AbstractCegarLoop]: Abstraction has 13523 states and 19967 transitions. [2021-11-23 17:12:44,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 19967 transitions. [2021-11-23 17:12:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:12:44,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:44,778 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:12:44,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:12:44,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:45,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:45,193 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2129270657, now seen corresponding path program 1 times [2021-11-23 17:12:45,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076516333] [2021-11-23 17:12:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:45,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:45,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:45,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:45,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:12:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:12:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:47,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:48,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076516333] [2021-11-23 17:12:48,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076516333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457702014] [2021-11-23 17:12:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:48,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:48,825 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:48,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:12:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:49,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:49,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [457702014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:49,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:12:49,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:12:49,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544245578] [2021-11-23 17:12:49,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:49,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:49,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:49,298 INFO L87 Difference]: Start difference. First operand 13523 states and 19967 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:49,546 INFO L93 Difference]: Finished difference Result 19511 states and 28593 transitions. [2021-11-23 17:12:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-23 17:12:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:49,563 INFO L225 Difference]: With dead ends: 19511 [2021-11-23 17:12:49,563 INFO L226 Difference]: Without dead ends: 7541 [2021-11-23 17:12:49,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:49,581 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 56 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:49,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3177 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7541 states. [2021-11-23 17:12:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7541 to 7539. [2021-11-23 17:12:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7539 states, 7537 states have (on average 1.4954225819291496) internal successors, (11271), 7538 states have internal predecessors, (11271), 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 17:12:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7539 states to 7539 states and 11271 transitions. [2021-11-23 17:12:50,147 INFO L78 Accepts]: Start accepts. Automaton has 7539 states and 11271 transitions. Word has length 112 [2021-11-23 17:12:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:50,147 INFO L470 AbstractCegarLoop]: Abstraction has 7539 states and 11271 transitions. [2021-11-23 17:12:50,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7539 states and 11271 transitions. [2021-11-23 17:12:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:12:50,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:50,153 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:12:50,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:50,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:50,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:50,557 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash -43415061, now seen corresponding path program 1 times [2021-11-23 17:12:50,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:50,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630868854] [2021-11-23 17:12:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:50,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:50,559 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:50,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:12:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:12:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:52,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:53,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:53,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630868854] [2021-11-23 17:12:53,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630868854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:53,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594904004] [2021-11-23 17:12:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:53,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:53,602 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:53,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:12:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:54,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:54,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1594904004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:54,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:12:54,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:12:54,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84511211] [2021-11-23 17:12:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:54,030 INFO L87 Difference]: Start difference. First operand 7539 states and 11271 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:54,275 INFO L93 Difference]: Finished difference Result 10535 states and 15549 transitions. [2021-11-23 17:12:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-23 17:12:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:54,285 INFO L225 Difference]: With dead ends: 10535 [2021-11-23 17:12:54,286 INFO L226 Difference]: Without dead ends: 4549 [2021-11-23 17:12:54,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:54,297 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 50 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:54,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 3162 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4549 states. [2021-11-23 17:12:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4549 to 4547. [2021-11-23 17:12:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4545 states have (on average 1.531133113311331) internal successors, (6959), 4546 states have internal predecessors, (6959), 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 17:12:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 6959 transitions. [2021-11-23 17:12:54,647 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 6959 transitions. Word has length 112 [2021-11-23 17:12:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:54,647 INFO L470 AbstractCegarLoop]: Abstraction has 4547 states and 6959 transitions. [2021-11-23 17:12:54,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 6959 transitions. [2021-11-23 17:12:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:12:54,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:54,651 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:12:54,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:54,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 17:12:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:55,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:55,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1550869621, now seen corresponding path program 1 times [2021-11-23 17:12:55,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:55,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58107585] [2021-11-23 17:12:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:55,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:55,069 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:12:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:55,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:12:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:56,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:12:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:57,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58107585] [2021-11-23 17:12:57,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58107585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:12:57,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034478306] [2021-11-23 17:12:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:57,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:57,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:12:57,938 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:12:57,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:12:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:12:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:12:58,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:58,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2034478306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:58,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:12:58,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2021-11-23 17:12:58,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532415442] [2021-11-23 17:12:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:58,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:58,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:58,352 INFO L87 Difference]: Start difference. First operand 4547 states and 6959 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:58,435 INFO L93 Difference]: Finished difference Result 6047 states and 9081 transitions. [2021-11-23 17:12:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-23 17:12:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:58,439 INFO L225 Difference]: With dead ends: 6047 [2021-11-23 17:12:58,439 INFO L226 Difference]: Without dead ends: 3053 [2021-11-23 17:12:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:12:58,445 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 46 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 3147 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:12:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2021-11-23 17:12:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3051. [2021-11-23 17:12:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3049 states have (on average 1.5811741554608068) internal successors, (4821), 3050 states have internal predecessors, (4821), 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 17:12:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4821 transitions. [2021-11-23 17:12:58,550 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4821 transitions. Word has length 112 [2021-11-23 17:12:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:58,551 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4821 transitions. [2021-11-23 17:12:58,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:12:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4821 transitions. [2021-11-23 17:12:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:12:58,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:58,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:58,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:58,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-23 17:12:58,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:58,957 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1213076479, now seen corresponding path program 1 times [2021-11-23 17:12:58,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:58,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510439330] [2021-11-23 17:12:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:58,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:58,961 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:58,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:12:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:12:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:00,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:01,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:01,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510439330] [2021-11-23 17:13:01,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510439330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:01,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314130991] [2021-11-23 17:13:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:01,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:01,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:13:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:04,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314130991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247233742] [2021-11-23 17:13:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:04,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:04,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:04,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:13:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247233742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:07,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:07,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:13:07,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075047278] [2021-11-23 17:13:07,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:07,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:13:07,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:13:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:13:07,328 INFO L87 Difference]: Start difference. First operand 3051 states and 4821 transitions. Second operand has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 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 17:13:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:07,671 INFO L93 Difference]: Finished difference Result 4120 states and 6330 transitions. [2021-11-23 17:13:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:13:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 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 112 [2021-11-23 17:13:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:07,677 INFO L225 Difference]: With dead ends: 4120 [2021-11-23 17:13:07,678 INFO L226 Difference]: Without dead ends: 3086 [2021-11-23 17:13:07,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:13:07,681 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 1480 mSDsluCounter, 14085 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 15641 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:07,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 15641 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-11-23 17:13:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2021-11-23 17:13:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 3085. [2021-11-23 17:13:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3083 states have (on average 1.5770353551735323) internal successors, (4862), 3084 states have internal predecessors, (4862), 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 17:13:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 4862 transitions. [2021-11-23 17:13:07,815 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 4862 transitions. Word has length 112 [2021-11-23 17:13:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:07,815 INFO L470 AbstractCegarLoop]: Abstraction has 3085 states and 4862 transitions. [2021-11-23 17:13:07,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 15 states have internal predecessors, (195), 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 17:13:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 4862 transitions. [2021-11-23 17:13:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:07,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:07,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:07,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:08,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:08,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:08,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:08,430 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash -773739457, now seen corresponding path program 1 times [2021-11-23 17:13:08,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:08,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111605317] [2021-11-23 17:13:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:08,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:08,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:08,433 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:08,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:13:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:10,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:11,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111605317] [2021-11-23 17:13:11,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111605317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:11,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618840776] [2021-11-23 17:13:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:11,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:11,446 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:11,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:13:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:13,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618840776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321985053] [2021-11-23 17:13:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:14,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:14,347 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:13:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:16,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321985053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:17,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:13:17,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073936544] [2021-11-23 17:13:17,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:17,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:13:17,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:13:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:13:17,676 INFO L87 Difference]: Start difference. First operand 3085 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 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 17:13:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:18,009 INFO L93 Difference]: Finished difference Result 4130 states and 6343 transitions. [2021-11-23 17:13:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:13:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 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 112 [2021-11-23 17:13:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:18,014 INFO L225 Difference]: With dead ends: 4130 [2021-11-23 17:13:18,014 INFO L226 Difference]: Without dead ends: 3096 [2021-11-23 17:13:18,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:13:18,017 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 4458 mSDsluCounter, 13897 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4458 SdHoareTripleChecker+Valid, 15454 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:18,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4458 Valid, 15454 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-11-23 17:13:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-11-23 17:13:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 3095. [2021-11-23 17:13:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3093 states have (on average 1.5758163595215002) internal successors, (4874), 3094 states have internal predecessors, (4874), 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 17:13:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 4874 transitions. [2021-11-23 17:13:18,116 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 4874 transitions. Word has length 112 [2021-11-23 17:13:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:18,117 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 4874 transitions. [2021-11-23 17:13:18,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.5625) internal successors, (201), 15 states have internal predecessors, (201), 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 17:13:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 4874 transitions. [2021-11-23 17:13:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:18,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:18,120 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:13:18,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:18,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:18,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:18,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:18,736 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1661301493, now seen corresponding path program 1 times [2021-11-23 17:13:18,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:18,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388167439] [2021-11-23 17:13:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:18,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:18,738 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:13:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:13:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:19,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:19,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:19,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388167439] [2021-11-23 17:13:19,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388167439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:19,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:19,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:13:19,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734892079] [2021-11-23 17:13:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:19,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:13:19,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:13:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:13:19,153 INFO L87 Difference]: Start difference. First operand 3095 states and 4874 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:13:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:19,208 INFO L93 Difference]: Finished difference Result 3647 states and 5646 transitions. [2021-11-23 17:13:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:13:19,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2021-11-23 17:13:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:19,213 INFO L225 Difference]: With dead ends: 3647 [2021-11-23 17:13:19,213 INFO L226 Difference]: Without dead ends: 2149 [2021-11-23 17:13:19,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 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 17:13:19,216 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 28 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:19,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 3147 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:13:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-11-23 17:13:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 2141. [2021-11-23 17:13:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.6493688639551192) internal successors, (3528), 2140 states have internal predecessors, (3528), 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 17:13:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3528 transitions. [2021-11-23 17:13:19,270 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3528 transitions. Word has length 112 [2021-11-23 17:13:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:19,270 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3528 transitions. [2021-11-23 17:13:19,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:13:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3528 transitions. [2021-11-23 17:13:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:19,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:19,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:19,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:19,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:19,472 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 315683201, now seen corresponding path program 1 times [2021-11-23 17:13:19,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71629020] [2021-11-23 17:13:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:19,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:19,476 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:19,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:13:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:13:20,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:20,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:20,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71629020] [2021-11-23 17:13:20,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71629020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:20,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:20,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:20,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834879865] [2021-11-23 17:13:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:20,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:20,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:20,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:20,582 INFO L87 Difference]: Start difference. First operand 2141 states and 3528 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 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 17:13:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:20,735 INFO L93 Difference]: Finished difference Result 2665 states and 4261 transitions. [2021-11-23 17:13:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 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 112 [2021-11-23 17:13:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:20,738 INFO L225 Difference]: With dead ends: 2665 [2021-11-23 17:13:20,738 INFO L226 Difference]: Without dead ends: 2141 [2021-11-23 17:13:20,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:20,740 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 1471 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 3239 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:20,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 3239 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-23 17:13:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-23 17:13:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2141. [2021-11-23 17:13:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.648901355773726) internal successors, (3527), 2140 states have internal predecessors, (3527), 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 17:13:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3527 transitions. [2021-11-23 17:13:20,814 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3527 transitions. Word has length 112 [2021-11-23 17:13:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3527 transitions. [2021-11-23 17:13:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 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 17:13:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3527 transitions. [2021-11-23 17:13:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:20,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:20,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:20,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:21,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:21,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 859988097, now seen corresponding path program 1 times [2021-11-23 17:13:21,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:21,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26866413] [2021-11-23 17:13:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:21,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:21,036 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:21,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:13:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:21,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:13:22,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:22,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26866413] [2021-11-23 17:13:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26866413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:22,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:22,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:22,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377265722] [2021-11-23 17:13:22,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:22,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:22,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:22,105 INFO L87 Difference]: Start difference. First operand 2141 states and 3527 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 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 17:13:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:22,216 INFO L93 Difference]: Finished difference Result 2669 states and 4265 transitions. [2021-11-23 17:13:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 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 112 [2021-11-23 17:13:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:22,220 INFO L225 Difference]: With dead ends: 2669 [2021-11-23 17:13:22,220 INFO L226 Difference]: Without dead ends: 2141 [2021-11-23 17:13:22,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:22,222 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 2920 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2920 SdHoareTripleChecker+Valid, 3194 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:22,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2920 Valid, 3194 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2021-11-23 17:13:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-23 17:13:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2141. [2021-11-23 17:13:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.6484338475923328) internal successors, (3526), 2140 states have internal predecessors, (3526), 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 17:13:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3526 transitions. [2021-11-23 17:13:22,282 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3526 transitions. Word has length 112 [2021-11-23 17:13:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3526 transitions. [2021-11-23 17:13:22,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 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 17:13:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3526 transitions. [2021-11-23 17:13:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:22,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:22,284 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:22,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:22,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:22,485 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash -815509631, now seen corresponding path program 1 times [2021-11-23 17:13:22,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:22,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623143008] [2021-11-23 17:13:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:22,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:22,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:22,487 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:22,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:13:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:13:23,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:23,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:23,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623143008] [2021-11-23 17:13:23,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623143008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:23,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:23,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:23,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702017013] [2021-11-23 17:13:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:23,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:23,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:23,534 INFO L87 Difference]: Start difference. First operand 2141 states and 3526 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:23,673 INFO L93 Difference]: Finished difference Result 2673 states and 4269 transitions. [2021-11-23 17:13:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:13:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:23,677 INFO L225 Difference]: With dead ends: 2673 [2021-11-23 17:13:23,677 INFO L226 Difference]: Without dead ends: 2141 [2021-11-23 17:13:23,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:23,679 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 1475 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:23,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 4746 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2021-11-23 17:13:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-23 17:13:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2141. [2021-11-23 17:13:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.6479663394109396) internal successors, (3525), 2140 states have internal predecessors, (3525), 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 17:13:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3525 transitions. [2021-11-23 17:13:23,755 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3525 transitions. Word has length 112 [2021-11-23 17:13:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3525 transitions. [2021-11-23 17:13:23,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3525 transitions. [2021-11-23 17:13:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:23,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:23,758 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:23,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:23,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:23,977 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1695105407, now seen corresponding path program 1 times [2021-11-23 17:13:23,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079786999] [2021-11-23 17:13:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:23,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:23,982 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:23,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:13:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:13:25,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:25,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079786999] [2021-11-23 17:13:25,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079786999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:25,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:25,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:25,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890538306] [2021-11-23 17:13:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:25,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:25,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:25,074 INFO L87 Difference]: Start difference. First operand 2141 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:25,199 INFO L93 Difference]: Finished difference Result 2677 states and 4273 transitions. [2021-11-23 17:13:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 17:13:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:25,202 INFO L225 Difference]: With dead ends: 2677 [2021-11-23 17:13:25,202 INFO L226 Difference]: Without dead ends: 2141 [2021-11-23 17:13:25,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:25,204 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 2935 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 4639 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:25,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 4639 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2021-11-23 17:13:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-23 17:13:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2141. [2021-11-23 17:13:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.6474988312295464) internal successors, (3524), 2140 states have internal predecessors, (3524), 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 17:13:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3524 transitions. [2021-11-23 17:13:25,256 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3524 transitions. Word has length 112 [2021-11-23 17:13:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:25,257 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3524 transitions. [2021-11-23 17:13:25,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:13:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3524 transitions. [2021-11-23 17:13:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:25,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:25,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:25,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:25,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:25,465 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1773776257, now seen corresponding path program 1 times [2021-11-23 17:13:25,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494570677] [2021-11-23 17:13:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:25,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:25,467 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:25,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:13:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:13:26,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:26,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494570677] [2021-11-23 17:13:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494570677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:26,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:26,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:26,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135187883] [2021-11-23 17:13:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:26,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:26,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:26,454 INFO L87 Difference]: Start difference. First operand 2141 states and 3524 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 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 17:13:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:26,701 INFO L93 Difference]: Finished difference Result 2681 states and 4277 transitions. [2021-11-23 17:13:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 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 112 [2021-11-23 17:13:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:26,704 INFO L225 Difference]: With dead ends: 2681 [2021-11-23 17:13:26,704 INFO L226 Difference]: Without dead ends: 2141 [2021-11-23 17:13:26,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:26,706 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 1479 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 3239 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:26,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 3239 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2021-11-23 17:13:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-11-23 17:13:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2141. [2021-11-23 17:13:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2139 states have (on average 1.6470313230481533) internal successors, (3523), 2140 states have internal predecessors, (3523), 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 17:13:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 3523 transitions. [2021-11-23 17:13:26,770 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 3523 transitions. Word has length 112 [2021-11-23 17:13:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:26,771 INFO L470 AbstractCegarLoop]: Abstraction has 2141 states and 3523 transitions. [2021-11-23 17:13:26,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 5 states have internal predecessors, (105), 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 17:13:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 3523 transitions. [2021-11-23 17:13:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 17:13:26,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:26,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:26,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:26,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:26,989 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 795679873, now seen corresponding path program 1 times [2021-11-23 17:13:26,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:26,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723564194] [2021-11-23 17:13:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:26,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:26,991 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:26,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:13:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:13:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 17:13:27,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:13:27,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723564194] [2021-11-23 17:13:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723564194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:13:27,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:13:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:13:27,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047811376] [2021-11-23 17:13:27,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:13:27,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:13:27,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:13:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:13:27,860 INFO L87 Difference]: Start difference. First operand 2141 states and 3523 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 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 17:13:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:28,043 INFO L93 Difference]: Finished difference Result 2659 states and 4250 transitions. [2021-11-23 17:13:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:13:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 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 112 [2021-11-23 17:13:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:28,046 INFO L225 Difference]: With dead ends: 2659 [2021-11-23 17:13:28,046 INFO L226 Difference]: Without dead ends: 2115 [2021-11-23 17:13:28,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:13:28,049 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 1482 mSDsluCounter, 3103 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 4678 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:28,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 4678 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-11-23 17:13:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-11-23 17:13:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 2115. [2021-11-23 17:13:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2113 states have (on average 1.6521533364884051) internal successors, (3491), 2114 states have internal predecessors, (3491), 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 17:13:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3491 transitions. [2021-11-23 17:13:28,125 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3491 transitions. Word has length 112 [2021-11-23 17:13:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:28,125 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3491 transitions. [2021-11-23 17:13:28,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 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 17:13:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3491 transitions. [2021-11-23 17:13:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 17:13:28,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:28,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:28,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:28,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:28,343 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1342629309, now seen corresponding path program 1 times [2021-11-23 17:13:28,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683321929] [2021-11-23 17:13:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:28,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:28,345 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:28,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:13:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:28,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:28,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:30,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:31,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683321929] [2021-11-23 17:13:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683321929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [81998849] [2021-11-23 17:13:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:31,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:31,516 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:31,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:13:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:33,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:34,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [81998849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:34,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977483243] [2021-11-23 17:13:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:34,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:34,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:34,645 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:34,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 17:13:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:37,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977483243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:38,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:38,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:13:38,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439980437] [2021-11-23 17:13:38,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:38,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:13:38,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:13:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:13:38,084 INFO L87 Difference]: Start difference. First operand 2115 states and 3491 transitions. Second operand has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 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 17:13:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:38,455 INFO L93 Difference]: Finished difference Result 2645 states and 4236 transitions. [2021-11-23 17:13:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:13:38,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 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 113 [2021-11-23 17:13:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:38,458 INFO L225 Difference]: With dead ends: 2645 [2021-11-23 17:13:38,458 INFO L226 Difference]: Without dead ends: 2127 [2021-11-23 17:13:38,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:13:38,461 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 4453 mSDsluCounter, 13947 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 15504 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:38,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4453 Valid, 15504 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2021-11-23 17:13:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-23 17:13:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2127. [2021-11-23 17:13:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2125 states have (on average 1.6503529411764706) internal successors, (3507), 2126 states have internal predecessors, (3507), 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 17:13:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 3507 transitions. [2021-11-23 17:13:38,520 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 3507 transitions. Word has length 113 [2021-11-23 17:13:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:38,520 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 3507 transitions. [2021-11-23 17:13:38,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.9375) internal successors, (207), 15 states have internal predecessors, (207), 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 17:13:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 3507 transitions. [2021-11-23 17:13:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 17:13:38,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:38,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:38,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:38,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:38,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:39,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:39,137 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1201032822, now seen corresponding path program 1 times [2021-11-23 17:13:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:39,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286813325] [2021-11-23 17:13:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:39,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:39,139 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:39,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 17:13:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:41,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:42,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286813325] [2021-11-23 17:13:42,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286813325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:42,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [340945840] [2021-11-23 17:13:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:42,302 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:42,303 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:42,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 17:13:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:45,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [340945840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235921509] [2021-11-23 17:13:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:45,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:45,517 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:45,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 17:13:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:45,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:49,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235921509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:49,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:13:49,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:13:49,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322893394] [2021-11-23 17:13:49,133 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:13:49,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:13:49,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:13:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:13:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:13:49,136 INFO L87 Difference]: Start difference. First operand 2127 states and 3507 transitions. Second operand has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 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 17:13:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:13:49,482 INFO L93 Difference]: Finished difference Result 2895 states and 4572 transitions. [2021-11-23 17:13:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:13:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 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 114 [2021-11-23 17:13:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:13:49,485 INFO L225 Difference]: With dead ends: 2895 [2021-11-23 17:13:49,486 INFO L226 Difference]: Without dead ends: 2377 [2021-11-23 17:13:49,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:13:49,488 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 4543 mSDsluCounter, 12414 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 13972 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:13:49,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 13972 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2021-11-23 17:13:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-11-23 17:13:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2139. [2021-11-23 17:13:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2137 states have (on average 1.648572765559195) internal successors, (3523), 2138 states have internal predecessors, (3523), 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 17:13:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3523 transitions. [2021-11-23 17:13:49,577 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3523 transitions. Word has length 114 [2021-11-23 17:13:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:13:49,577 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 3523 transitions. [2021-11-23 17:13:49,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.3125) internal successors, (213), 15 states have internal predecessors, (213), 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 17:13:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3523 transitions. [2021-11-23 17:13:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:13:49,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:13:49,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:13:49,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:49,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 17:13:49,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 17:13:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:13:50,180 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:13:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:13:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1855059418, now seen corresponding path program 1 times [2021-11-23 17:13:50,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:13:50,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927943066] [2021-11-23 17:13:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:50,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:13:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:13:50,182 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:13:50,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:13:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:52,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:53,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:13:53,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927943066] [2021-11-23 17:13:53,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927943066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:53,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802999045] [2021-11-23 17:13:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:53,548 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:13:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:13:53,549 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:13:53,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:13:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:55,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:13:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802999045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:13:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152071939] [2021-11-23 17:13:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:13:56,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:13:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:13:56,917 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:13:56,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 17:13:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:13:57,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:13:57,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:13:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:13:59,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:00,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152071939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:00,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:14:00,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:14:00,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002461542] [2021-11-23 17:14:00,636 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:14:00,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:14:00,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:14:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:14:00,638 INFO L87 Difference]: Start difference. First operand 2139 states and 3523 transitions. Second operand has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 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 17:14:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:01,038 INFO L93 Difference]: Finished difference Result 2669 states and 4268 transitions. [2021-11-23 17:14:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:14:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 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 115 [2021-11-23 17:14:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:01,041 INFO L225 Difference]: With dead ends: 2669 [2021-11-23 17:14:01,041 INFO L226 Difference]: Without dead ends: 2151 [2021-11-23 17:14:01,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:14:01,043 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 5902 mSDsluCounter, 9492 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5902 SdHoareTripleChecker+Valid, 11045 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:01,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5902 Valid, 11045 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2021-11-23 17:14:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-11-23 17:14:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2151. [2021-11-23 17:14:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2149 states have (on average 1.6468124709167054) internal successors, (3539), 2150 states have internal predecessors, (3539), 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 17:14:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3539 transitions. [2021-11-23 17:14:01,106 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3539 transitions. Word has length 115 [2021-11-23 17:14:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:01,106 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 3539 transitions. [2021-11-23 17:14:01,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.6875) internal successors, (219), 15 states have internal predecessors, (219), 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 17:14:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3539 transitions. [2021-11-23 17:14:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:14:01,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:01,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:01,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:01,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-23 17:14:01,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:01,725 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 351191981, now seen corresponding path program 1 times [2021-11-23 17:14:01,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:01,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580719493] [2021-11-23 17:14:01,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:01,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:01,728 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:01,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:14:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:14:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:04,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:05,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580719493] [2021-11-23 17:14:05,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580719493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1160847681] [2021-11-23 17:14:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:05,236 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:14:05,238 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:14:05,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 17:14:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:14:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:07,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:08,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1160847681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:08,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753822159] [2021-11-23 17:14:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:08,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:14:08,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:08,976 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:14:08,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 17:14:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:09,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:14:09,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:14:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:12,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753822159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:14:12,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:14:12,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:14:12,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715443403] [2021-11-23 17:14:12,889 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:14:12,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:14:12,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:14:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:14:12,891 INFO L87 Difference]: Start difference. First operand 2151 states and 3539 transitions. Second operand has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 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 17:14:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:13,301 INFO L93 Difference]: Finished difference Result 2683 states and 4290 transitions. [2021-11-23 17:14:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:14:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 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 116 [2021-11-23 17:14:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:13,305 INFO L225 Difference]: With dead ends: 2683 [2021-11-23 17:14:13,305 INFO L226 Difference]: Without dead ends: 2165 [2021-11-23 17:14:13,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:14:13,308 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 7346 mSDsluCounter, 11071 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7346 SdHoareTripleChecker+Valid, 12622 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7346 Valid, 12622 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-11-23 17:14:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-11-23 17:14:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2163. [2021-11-23 17:14:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2161 states have (on average 1.6459972235076354) internal successors, (3557), 2162 states have internal predecessors, (3557), 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 17:14:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3557 transitions. [2021-11-23 17:14:13,364 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3557 transitions. Word has length 116 [2021-11-23 17:14:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:13,365 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 3557 transitions. [2021-11-23 17:14:13,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.0625) internal successors, (225), 15 states have internal predecessors, (225), 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 17:14:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3557 transitions. [2021-11-23 17:14:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 17:14:13,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:13,367 INFO L514 BasicCegarLoop]: trace histogram [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, 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 17:14:13,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:13,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:13,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-23 17:14:13,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:13,988 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1569177379, now seen corresponding path program 1 times [2021-11-23 17:14:13,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349250498] [2021-11-23 17:14:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:13,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:13,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:13,990 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:13,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:14:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:14:14,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:14,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349250498] [2021-11-23 17:14:14,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349250498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:14,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:14,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:14:14,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107804549] [2021-11-23 17:14:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:14,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:14,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:14,353 INFO L87 Difference]: Start difference. First operand 2163 states and 3557 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 17:14:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:14,400 INFO L93 Difference]: Finished difference Result 2425 states and 3922 transitions. [2021-11-23 17:14:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:14:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2021-11-23 17:14:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:14,403 INFO L225 Difference]: With dead ends: 2425 [2021-11-23 17:14:14,403 INFO L226 Difference]: Without dead ends: 1907 [2021-11-23 17:14:14,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 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 17:14:14,405 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 34 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:14,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 3120 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:14:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-23 17:14:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1905. [2021-11-23 17:14:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1903 states have (on average 1.6757750919600631) internal successors, (3189), 1904 states have internal predecessors, (3189), 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 17:14:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3189 transitions. [2021-11-23 17:14:14,482 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3189 transitions. Word has length 116 [2021-11-23 17:14:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:14,483 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 3189 transitions. [2021-11-23 17:14:14,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 17:14:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3189 transitions. [2021-11-23 17:14:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:14,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:14,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:14,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:14,685 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 514206833, now seen corresponding path program 1 times [2021-11-23 17:14:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007504583] [2021-11-23 17:14:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:14,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:14,688 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:14,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:14:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 17:14:17,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:17,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007504583] [2021-11-23 17:14:17,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007504583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:17,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:17,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890404230] [2021-11-23 17:14:17,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:17,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:17,375 INFO L87 Difference]: Start difference. First operand 1905 states and 3189 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 17:14:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:17,793 INFO L93 Difference]: Finished difference Result 2573 states and 4108 transitions. [2021-11-23 17:14:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 117 [2021-11-23 17:14:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:17,797 INFO L225 Difference]: With dead ends: 2573 [2021-11-23 17:14:17,798 INFO L226 Difference]: Without dead ends: 2313 [2021-11-23 17:14:17,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:17,800 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 6972 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6972 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:17,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6972 Valid, 3700 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:14:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-23 17:14:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1905. [2021-11-23 17:14:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1903 states have (on average 1.672622175512349) internal successors, (3183), 1904 states have internal predecessors, (3183), 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 17:14:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3183 transitions. [2021-11-23 17:14:17,868 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3183 transitions. Word has length 117 [2021-11-23 17:14:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 3183 transitions. [2021-11-23 17:14:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 17:14:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3183 transitions. [2021-11-23 17:14:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:17,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:17,871 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:17,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:18,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:18,073 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2016565940, now seen corresponding path program 1 times [2021-11-23 17:14:18,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909793211] [2021-11-23 17:14:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:18,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:18,075 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 17:14:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:14:20,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:20,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909793211] [2021-11-23 17:14:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909793211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:20,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:20,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:20,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889699710] [2021-11-23 17:14:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:20,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:20,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:20,999 INFO L87 Difference]: Start difference. First operand 1905 states and 3183 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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 17:14:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:21,340 INFO L93 Difference]: Finished difference Result 2487 states and 3986 transitions. [2021-11-23 17:14:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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 117 [2021-11-23 17:14:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:21,346 INFO L225 Difference]: With dead ends: 2487 [2021-11-23 17:14:21,346 INFO L226 Difference]: Without dead ends: 2399 [2021-11-23 17:14:21,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:21,348 INFO L933 BasicCegarLoop]: 1685 mSDtfsCounter, 3757 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:21,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3757 Valid, 3705 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:14:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-11-23 17:14:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 1995. [2021-11-23 17:14:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1993 states have (on average 1.6573005519317612) internal successors, (3303), 1994 states have internal predecessors, (3303), 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 17:14:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3303 transitions. [2021-11-23 17:14:21,426 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3303 transitions. Word has length 117 [2021-11-23 17:14:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:21,427 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3303 transitions. [2021-11-23 17:14:21,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 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 17:14:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3303 transitions. [2021-11-23 17:14:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:21,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:21,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:21,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:21,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:21,644 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 661102161, now seen corresponding path program 1 times [2021-11-23 17:14:21,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:21,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202164231] [2021-11-23 17:14:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:21,645 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:21,647 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:21,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 17:14:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:21,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 17:14:25,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:25,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:25,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202164231] [2021-11-23 17:14:25,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202164231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:25,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:25,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:25,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298816448] [2021-11-23 17:14:25,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:25,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:25,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:25,033 INFO L87 Difference]: Start difference. First operand 1995 states and 3303 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 17:14:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:25,396 INFO L93 Difference]: Finished difference Result 2577 states and 4106 transitions. [2021-11-23 17:14:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 117 [2021-11-23 17:14:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:25,400 INFO L225 Difference]: With dead ends: 2577 [2021-11-23 17:14:25,400 INFO L226 Difference]: Without dead ends: 2489 [2021-11-23 17:14:25,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:25,401 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 5049 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5049 SdHoareTripleChecker+Valid, 3814 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:25,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5049 Valid, 3814 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:14:25,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-11-23 17:14:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2091. [2021-11-23 17:14:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2091 states, 2089 states have (on average 1.6424126376256583) internal successors, (3431), 2090 states have internal predecessors, (3431), 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 17:14:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 3431 transitions. [2021-11-23 17:14:25,476 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 3431 transitions. Word has length 117 [2021-11-23 17:14:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:25,477 INFO L470 AbstractCegarLoop]: Abstraction has 2091 states and 3431 transitions. [2021-11-23 17:14:25,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 17:14:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 3431 transitions. [2021-11-23 17:14:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:25,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:25,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:25,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:25,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:25,681 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 300750036, now seen corresponding path program 1 times [2021-11-23 17:14:25,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308183097] [2021-11-23 17:14:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:25,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:25,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:25,683 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:25,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-23 17:14:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:14:29,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:29,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308183097] [2021-11-23 17:14:29,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308183097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:29,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:29,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:29,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045793102] [2021-11-23 17:14:29,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:29,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:29,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:29,341 INFO L87 Difference]: Start difference. First operand 2091 states and 3431 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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 17:14:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:29,717 INFO L93 Difference]: Finished difference Result 2673 states and 4234 transitions. [2021-11-23 17:14:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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 117 [2021-11-23 17:14:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:29,721 INFO L225 Difference]: With dead ends: 2673 [2021-11-23 17:14:29,721 INFO L226 Difference]: Without dead ends: 2585 [2021-11-23 17:14:29,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:29,722 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 6671 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6671 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:29,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6671 Valid, 3721 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:14:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-23 17:14:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2193. [2021-11-23 17:14:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2191 states have (on average 1.6280237334550434) internal successors, (3567), 2192 states have internal predecessors, (3567), 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 17:14:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3567 transitions. [2021-11-23 17:14:29,786 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3567 transitions. Word has length 117 [2021-11-23 17:14:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:29,787 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 3567 transitions. [2021-11-23 17:14:29,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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 17:14:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3567 transitions. [2021-11-23 17:14:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:29,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:29,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:29,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:29,996 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash 770455601, now seen corresponding path program 1 times [2021-11-23 17:14:29,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089786822] [2021-11-23 17:14:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:29,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:29,998 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:29,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 17:14:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:14:32,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:32,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:32,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089786822] [2021-11-23 17:14:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089786822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:32,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:32,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:32,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609785133] [2021-11-23 17:14:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:32,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:32,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:32,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:32,636 INFO L87 Difference]: Start difference. First operand 2193 states and 3567 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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 17:14:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:32,997 INFO L93 Difference]: Finished difference Result 2775 states and 4370 transitions. [2021-11-23 17:14:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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 117 [2021-11-23 17:14:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:33,001 INFO L225 Difference]: With dead ends: 2775 [2021-11-23 17:14:33,001 INFO L226 Difference]: Without dead ends: 2687 [2021-11-23 17:14:33,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:33,003 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 3569 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3569 SdHoareTripleChecker+Valid, 3852 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:33,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3569 Valid, 3852 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:14:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-11-23 17:14:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2301. [2021-11-23 17:14:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2299 states have (on average 1.6141800782949107) internal successors, (3711), 2300 states have internal predecessors, (3711), 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 17:14:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3711 transitions. [2021-11-23 17:14:33,082 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3711 transitions. Word has length 117 [2021-11-23 17:14:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:33,082 INFO L470 AbstractCegarLoop]: Abstraction has 2301 states and 3711 transitions. [2021-11-23 17:14:33,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 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 17:14:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3711 transitions. [2021-11-23 17:14:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-23 17:14:33,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:33,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:33,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:33,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:33,289 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash 295544564, now seen corresponding path program 1 times [2021-11-23 17:14:33,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:33,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563923386] [2021-11-23 17:14:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:33,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:33,292 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:33,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 17:14:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:14:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:14:36,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:36,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:36,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563923386] [2021-11-23 17:14:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563923386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:36,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:36,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:14:36,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383785926] [2021-11-23 17:14:36,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:36,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:14:36,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:14:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:36,333 INFO L87 Difference]: Start difference. First operand 2301 states and 3711 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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 17:14:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:14:36,665 INFO L93 Difference]: Finished difference Result 2883 states and 4514 transitions. [2021-11-23 17:14:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:14:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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 117 [2021-11-23 17:14:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:14:36,669 INFO L225 Difference]: With dead ends: 2883 [2021-11-23 17:14:36,669 INFO L226 Difference]: Without dead ends: 2795 [2021-11-23 17:14:36,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:14:36,671 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 6667 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6667 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:14:36,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6667 Valid, 3694 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:14:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-11-23 17:14:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2409. [2021-11-23 17:14:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2407 states have (on average 1.6015787287079353) internal successors, (3855), 2408 states have internal predecessors, (3855), 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 17:14:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3855 transitions. [2021-11-23 17:14:36,762 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3855 transitions. Word has length 117 [2021-11-23 17:14:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:14:36,762 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 3855 transitions. [2021-11-23 17:14:36,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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 17:14:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3855 transitions. [2021-11-23 17:14:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:14:36,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:36,763 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, 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 17:14:36,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:14:36,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:14:36,964 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 885655031, now seen corresponding path program 1 times [2021-11-23 17:14:36,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:36,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471550966] [2021-11-23 17:14:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:36,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:36,966 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 17:14:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:14:37,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:08,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:23,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:23,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471550966] [2021-11-23 17:15:23,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471550966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [217837850] [2021-11-23 17:15:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:23,434 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:15:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:15:23,436 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:15:23,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-23 17:15:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:15:23,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:35,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:15:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [217837850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:15:39,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699341125] [2021-11-23 17:15:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:39,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:15:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:15:39,397 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:15:39,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 17:15:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:39,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 17:15:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:34,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:42,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699341125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:42,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:16:42,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 17, 15, 41, 34] total 131 [2021-11-23 17:16:42,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985836533] [2021-11-23 17:16:42,232 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:16:42,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-23 17:16:42,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-23 17:16:42,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2068, Invalid=14962, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 17:16:42,241 INFO L87 Difference]: Start difference. First operand 2409 states and 3855 transitions. Second operand has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 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 17:17:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:16,270 INFO L93 Difference]: Finished difference Result 2920 states and 4502 transitions. [2021-11-23 17:17:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 17:17:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 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 118 [2021-11-23 17:17:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:16,274 INFO L225 Difference]: With dead ends: 2920 [2021-11-23 17:17:16,274 INFO L226 Difference]: Without dead ends: 2742 [2021-11-23 17:17:16,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8989 ImplicationChecksByTransitivity, 111.7s TimeCoverageRelationStatistics Valid=2924, Invalid=21882, Unknown=0, NotChecked=0, Total=24806 [2021-11-23 17:17:16,283 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 10586 mSDsluCounter, 42885 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10586 SdHoareTripleChecker+Valid, 44450 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 954 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:16,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10586 Valid, 44450 Invalid, 1905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 929 Invalid, 0 Unknown, 954 Unchecked, 2.4s Time] [2021-11-23 17:17:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-11-23 17:17:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2430. [2021-11-23 17:17:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2428 states have (on average 1.5980230642504119) internal successors, (3880), 2429 states have internal predecessors, (3880), 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 17:17:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3880 transitions. [2021-11-23 17:17:16,374 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3880 transitions. Word has length 118 [2021-11-23 17:17:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 3880 transitions. [2021-11-23 17:17:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.717557251908397) internal successors, (487), 131 states have internal predecessors, (487), 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 17:17:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3880 transitions. [2021-11-23 17:17:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:17:16,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:16,376 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, 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 17:17:16,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:16,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:16,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-23 17:17:16,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:17:16,977 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1815950842, now seen corresponding path program 1 times [2021-11-23 17:17:16,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:16,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705464185] [2021-11-23 17:17:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:16,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:16,980 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-23 17:17:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:17:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:35,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:46,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705464185] [2021-11-23 17:17:46,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705464185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:17:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993314026] [2021-11-23 17:17:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:46,457 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:17:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:17:46,462 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:17:46,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-23 17:17:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:46,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:17:46,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:18:59,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:19:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:05,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993314026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:19:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030294958] [2021-11-23 17:19:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:05,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:19:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:19:05,596 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:19:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 17:19:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 17:19:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:54,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:03,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030294958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:03,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:20:03,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 41, 32, 42, 36] total 136 [2021-11-23 17:20:03,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075425435] [2021-11-23 17:20:03,243 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:20:03,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-23 17:20:03,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-23 17:20:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2110, Invalid=16250, Unknown=0, NotChecked=0, Total=18360 [2021-11-23 17:20:03,251 INFO L87 Difference]: Start difference. First operand 2430 states and 3880 transitions. Second operand has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 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 17:20:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:27,468 INFO L93 Difference]: Finished difference Result 2905 states and 4489 transitions. [2021-11-23 17:20:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 17:20:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 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 118 [2021-11-23 17:20:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:27,471 INFO L225 Difference]: With dead ends: 2905 [2021-11-23 17:20:27,472 INFO L226 Difference]: Without dead ends: 2717 [2021-11-23 17:20:27,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 580 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9546 ImplicationChecksByTransitivity, 136.2s TimeCoverageRelationStatistics Valid=3034, Invalid=24356, Unknown=0, NotChecked=0, Total=27390 [2021-11-23 17:20:27,475 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 7649 mSDsluCounter, 51806 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7649 SdHoareTripleChecker+Valid, 53374 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:27,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7649 Valid, 53374 Invalid, 1333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 513 Invalid, 0 Unknown, 812 Unchecked, 1.2s Time] [2021-11-23 17:20:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2717 states. [2021-11-23 17:20:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2717 to 2431. [2021-11-23 17:20:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2429 states have (on average 1.5977768629065459) internal successors, (3881), 2430 states have internal predecessors, (3881), 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 17:20:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3881 transitions. [2021-11-23 17:20:27,565 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3881 transitions. Word has length 118 [2021-11-23 17:20:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 2431 states and 3881 transitions. [2021-11-23 17:20:27,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.036764705882353) internal successors, (413), 136 states have internal predecessors, (413), 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 17:20:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3881 transitions. [2021-11-23 17:20:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:20:27,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:27,567 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, 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 17:20:27,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:27,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:27,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:28,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:28,168 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash -765030441, now seen corresponding path program 1 times [2021-11-23 17:20:28,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:28,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130710743] [2021-11-23 17:20:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:28,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:28,171 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:28,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2021-11-23 17:20:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:20:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:30,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:31,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130710743] [2021-11-23 17:20:31,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130710743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338150358] [2021-11-23 17:20:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:31,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:31,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:31,427 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:31,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2021-11-23 17:20:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:31,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:20:31,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:22,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:21:52,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338150358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:52,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393614883] [2021-11-23 17:21:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:52,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:21:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:21:52,093 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:21:52,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 17:21:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 17:21:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:22:52,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393614883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:52,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:22:52,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 41, 32, 36, 39] total 122 [2021-11-23 17:22:52,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519741604] [2021-11-23 17:22:52,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:22:52,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-23 17:22:52,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-23 17:22:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=13208, Unknown=0, NotChecked=0, Total=14762 [2021-11-23 17:22:52,911 INFO L87 Difference]: Start difference. First operand 2431 states and 3881 transitions. Second operand has 122 states, 122 states have (on average 4.237704918032787) internal successors, (517), 122 states have internal predecessors, (517), 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 17:23:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:23:25,923 INFO L93 Difference]: Finished difference Result 3007 states and 4595 transitions. [2021-11-23 17:23:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 17:23:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 4.237704918032787) internal successors, (517), 122 states have internal predecessors, (517), 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 118 [2021-11-23 17:23:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:23:25,927 INFO L225 Difference]: With dead ends: 3007 [2021-11-23 17:23:25,927 INFO L226 Difference]: Without dead ends: 2807 [2021-11-23 17:23:25,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6745 ImplicationChecksByTransitivity, 135.3s TimeCoverageRelationStatistics Valid=2463, Invalid=19589, Unknown=0, NotChecked=0, Total=22052 [2021-11-23 17:23:25,931 INFO L933 BasicCegarLoop]: 1571 mSDtfsCounter, 26473 mSDsluCounter, 50109 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26473 SdHoareTripleChecker+Valid, 51680 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:23:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26473 Valid, 51680 Invalid, 2014 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [34 Valid, 1443 Invalid, 0 Unknown, 537 Unchecked, 3.4s Time] [2021-11-23 17:23:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-11-23 17:23:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2432. [2021-11-23 17:23:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2430 states have (on average 1.5975308641975308) internal successors, (3882), 2431 states have internal predecessors, (3882), 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 17:23:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3882 transitions. [2021-11-23 17:23:26,025 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3882 transitions. Word has length 118 [2021-11-23 17:23:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:23:26,025 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 3882 transitions. [2021-11-23 17:23:26,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 4.237704918032787) internal successors, (517), 122 states have internal predecessors, (517), 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 17:23:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3882 transitions. [2021-11-23 17:23:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 17:23:26,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:23:26,026 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, 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 17:23:26,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:26,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-23 17:23:26,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2021-11-23 17:23:26,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:23:26,628 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:23:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:23:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash 910940186, now seen corresponding path program 1 times [2021-11-23 17:23:26,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:23:26,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673691917] [2021-11-23 17:23:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:26,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:23:26,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:23:26,630 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:23:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bc3d12e-0012-4d12-9dfc-77970906144e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2021-11-23 17:23:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:23:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:23:29,057 INFO L328 TraceCheckSpWp]: Computing backward predicates...