./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P --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 ff26d52d3dd6862aaa491849b175f59b72df2f5a860b195ac82ad5bea041e83f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:41:00,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:41:00,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:41:00,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:41:00,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:41:00,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:41:00,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:41:00,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:41:00,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:41:00,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:41:00,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:41:00,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:41:00,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:41:00,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:41:00,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:41:00,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:41:00,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:41:00,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:41:00,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:41:00,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:41:00,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:41:00,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:41:00,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:41:00,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:41:00,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:41:00,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:41:00,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:41:00,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:41:00,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:41:00,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:41:00,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:41:00,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:41:00,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:41:00,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:41:00,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:41:00,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:41:00,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:41:00,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:41:00,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:41:00,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:41:00,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:41:00,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:41:00,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:41:00,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:41:00,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:41:00,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:41:00,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:41:00,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:41:00,240 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:41:00,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:41:00,240 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:41:00,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:41:00,241 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:41:00,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:41:00,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:41:00,242 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:41:00,242 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:41:00,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:41:00,243 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:41:00,243 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:41:00,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:41:00,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:41:00,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:41:00,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:41:00,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:41:00,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:41:00,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:41:00,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:41:00,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:41:00,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:41:00,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:41:00,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:41:00,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:41:00,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:41:00,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:00,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:41:00,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:41:00,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:41:00,249 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:41:00,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:41:00,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:41:00,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:41:00,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:41:00,250 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_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff26d52d3dd6862aaa491849b175f59b72df2f5a860b195ac82ad5bea041e83f [2021-11-21 00:41:00,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:41:00,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:41:00,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:41:00,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:41:00,652 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:41:00,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c [2021-11-21 00:41:00,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/data/588ac9a70/2c2fa274567f461a94d0fc479b657e69/FLAG1c44d616a [2021-11-21 00:41:01,922 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:41:01,924 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c [2021-11-21 00:41:02,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/data/588ac9a70/2c2fa274567f461a94d0fc479b657e69/FLAG1c44d616a [2021-11-21 00:41:02,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/data/588ac9a70/2c2fa274567f461a94d0fc479b657e69 [2021-11-21 00:41:02,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:41:02,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:41:02,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:02,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:41:02,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:41:02,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:02" (1/1) ... [2021-11-21 00:41:02,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ac4e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:02, skipping insertion in model container [2021-11-21 00:41:02,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:41:02" (1/1) ... [2021-11-21 00:41:02,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:41:02,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:41:04,936 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_ec42e657-7473-49b5-925c-50ffcf94f912/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c[382357,382370] [2021-11-21 00:41:04,964 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_ec42e657-7473-49b5-925c-50ffcf94f912/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c[383339,383352] [2021-11-21 00:41:05,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:05,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:41:06,706 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_ec42e657-7473-49b5-925c-50ffcf94f912/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c[382357,382370] [2021-11-21 00:41:06,709 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_ec42e657-7473-49b5-925c-50ffcf94f912/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-1.c[383339,383352] [2021-11-21 00:41:06,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:41:06,805 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:41:06,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06 WrapperNode [2021-11-21 00:41:06,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:41:06,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:06,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:41:06,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:41:06,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:06,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,234 INFO L137 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12619 [2021-11-21 00:41:07,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:41:07,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:41:07,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:41:07,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:41:07,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:41:07,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:41:07,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:41:07,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:41:07,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (1/1) ... [2021-11-21 00:41:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:41:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:08,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:41:08,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:41:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:41:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:41:08,145 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:41:08,145 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:41:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:41:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 00:41:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 00:41:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:41:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:41:08,146 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:41:08,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:41:08,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:41:08,147 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:41:08,147 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:41:08,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:41:08,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:41:08,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:41:08,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:41:16,317 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:41:18,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:41:18,903 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-21 00:41:18,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:18 BoogieIcfgContainer [2021-11-21 00:41:18,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:41:18,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:41:18,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:41:18,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:41:18,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:41:02" (1/3) ... [2021-11-21 00:41:18,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e732fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:18, skipping insertion in model container [2021-11-21 00:41:18,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:41:06" (2/3) ... [2021-11-21 00:41:18,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e732fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:41:18, skipping insertion in model container [2021-11-21 00:41:18,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:41:18" (3/3) ... [2021-11-21 00:41:18,926 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-1.c [2021-11-21 00:41:18,941 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:41:18,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:41:19,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:41:19,024 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 [2021-11-21 00:41:19,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:41:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-21 00:41:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:41:19,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:19,111 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] [2021-11-21 00:41:19,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1502965456, now seen corresponding path program 1 times [2021-11-21 00:41:19,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123420339] [2021-11-21 00:41:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:19,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:19,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123420339] [2021-11-21 00:41:19,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123420339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:19,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:41:19,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475189503] [2021-11-21 00:41:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:19,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:19,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:19,584 INFO L87 Difference]: Start difference. First operand has 1721 states, 1696 states have (on average 1.977004716981132) internal successors, (3353), 1699 states have internal predecessors, (3353), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:41:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:20,469 INFO L93 Difference]: Finished difference Result 3503 states and 6867 transitions. [2021-11-21 00:41:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-11-21 00:41:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:20,502 INFO L225 Difference]: With dead ends: 3503 [2021-11-21 00:41:20,503 INFO L226 Difference]: Without dead ends: 1781 [2021-11-21 00:41:20,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:41:20,521 INFO L933 BasicCegarLoop]: 3211 mSDtfsCounter, 3449 mSDsluCounter, 3401 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:20,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3449 Valid, 6364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:41:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-11-21 00:41:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1780. [2021-11-21 00:41:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1738 states have (on average 1.9562715765247412) internal successors, (3400), 1741 states have internal predecessors, (3400), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 00:41:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3456 transitions. [2021-11-21 00:41:20,704 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3456 transitions. Word has length 37 [2021-11-21 00:41:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:20,705 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3456 transitions. [2021-11-21 00:41:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:41:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3456 transitions. [2021-11-21 00:41:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:41:20,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:20,719 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] [2021-11-21 00:41:20,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:41:20,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1469937969, now seen corresponding path program 1 times [2021-11-21 00:41:20,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:20,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990470264] [2021-11-21 00:41:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:20,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:41:20,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:20,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990470264] [2021-11-21 00:41:20,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990470264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905524397] [2021-11-21 00:41:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:20,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:20,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:41:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:41:21,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:21,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905524397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:21,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:21,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-21 00:41:21,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346575301] [2021-11-21 00:41:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:21,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:21,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:21,233 INFO L87 Difference]: Start difference. First operand 1780 states and 3456 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:41:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:21,752 INFO L93 Difference]: Finished difference Result 2041 states and 3815 transitions. [2021-11-21 00:41:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-11-21 00:41:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:21,783 INFO L225 Difference]: With dead ends: 2041 [2021-11-21 00:41:21,792 INFO L226 Difference]: Without dead ends: 1907 [2021-11-21 00:41:21,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:21,795 INFO L933 BasicCegarLoop]: 3173 mSDtfsCounter, 3348 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 3248 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:21,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3348 Valid, 3248 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-11-21 00:41:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1903. [2021-11-21 00:41:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1827 states have (on average 1.9250136836343732) internal successors, (3517), 1831 states have internal predecessors, (3517), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-21 00:41:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3617 transitions. [2021-11-21 00:41:21,865 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3617 transitions. Word has length 66 [2021-11-21 00:41:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:21,866 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 3617 transitions. [2021-11-21 00:41:21,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:41:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3617 transitions. [2021-11-21 00:41:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:41:21,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:21,886 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] [2021-11-21 00:41:21,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:22,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -115121297, now seen corresponding path program 1 times [2021-11-21 00:41:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:22,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512879518] [2021-11-21 00:41:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:41:22,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512879518] [2021-11-21 00:41:22,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512879518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:22,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:22,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:41:22,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962362732] [2021-11-21 00:41:22,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:22,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:41:22,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:41:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:22,232 INFO L87 Difference]: Start difference. First operand 1903 states and 3617 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:41:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:23,320 INFO L93 Difference]: Finished difference Result 2443 states and 4338 transitions. [2021-11-21 00:41:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:41:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2021-11-21 00:41:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:23,351 INFO L225 Difference]: With dead ends: 2443 [2021-11-21 00:41:23,351 INFO L226 Difference]: Without dead ends: 2187 [2021-11-21 00:41:23,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:41:23,359 INFO L933 BasicCegarLoop]: 3151 mSDtfsCounter, 3509 mSDsluCounter, 10004 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 12489 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:23,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3520 Valid, 12489 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:41:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-11-21 00:41:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2133. [2021-11-21 00:41:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 1991 states have (on average 1.8719236564540431) internal successors, (3727), 1997 states have internal predecessors, (3727), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-21 00:41:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 3911 transitions. [2021-11-21 00:41:23,510 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 3911 transitions. Word has length 66 [2021-11-21 00:41:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:23,511 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 3911 transitions. [2021-11-21 00:41:23,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:41:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 3911 transitions. [2021-11-21 00:41:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:41:23,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:23,523 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] [2021-11-21 00:41:23,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:41:23,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash 721341096, now seen corresponding path program 1 times [2021-11-21 00:41:23,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056345430] [2021-11-21 00:41:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:23,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:41:23,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:23,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056345430] [2021-11-21 00:41:23,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056345430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:23,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:23,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:41:23,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942274519] [2021-11-21 00:41:23,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:23,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:41:23,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:41:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:23,702 INFO L87 Difference]: Start difference. First operand 2133 states and 3911 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:41:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:24,815 INFO L93 Difference]: Finished difference Result 2871 states and 4883 transitions. [2021-11-21 00:41:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:41:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2021-11-21 00:41:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:24,843 INFO L225 Difference]: With dead ends: 2871 [2021-11-21 00:41:24,844 INFO L226 Difference]: Without dead ends: 2385 [2021-11-21 00:41:24,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:41:24,858 INFO L933 BasicCegarLoop]: 3155 mSDtfsCounter, 3475 mSDsluCounter, 10013 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 12503 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:24,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3481 Valid, 12503 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 00:41:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-11-21 00:41:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2359. [2021-11-21 00:41:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2151 states have (on average 1.8256624825662482) internal successors, (3927), 2159 states have internal predecessors, (3927), 134 states have call successors, (134), 72 states have call predecessors, (134), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-21 00:41:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 4195 transitions. [2021-11-21 00:41:25,125 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 4195 transitions. Word has length 67 [2021-11-21 00:41:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:25,126 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 4195 transitions. [2021-11-21 00:41:25,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:41:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 4195 transitions. [2021-11-21 00:41:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:41:25,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:25,130 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] [2021-11-21 00:41:25,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:41:25,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash -324435957, now seen corresponding path program 1 times [2021-11-21 00:41:25,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:25,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271975457] [2021-11-21 00:41:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:25,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:41:25,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271975457] [2021-11-21 00:41:25,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271975457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:25,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:25,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:25,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124283610] [2021-11-21 00:41:25,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:25,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:25,263 INFO L87 Difference]: Start difference. First operand 2359 states and 4195 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:25,742 INFO L93 Difference]: Finished difference Result 2904 states and 4905 transitions. [2021-11-21 00:41:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-21 00:41:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:25,760 INFO L225 Difference]: With dead ends: 2904 [2021-11-21 00:41:25,760 INFO L226 Difference]: Without dead ends: 2532 [2021-11-21 00:41:25,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:25,764 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 35 mSDsluCounter, 3368 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 6322 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:25,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 6322 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-11-21 00:41:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2439. [2021-11-21 00:41:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2219 states have (on average 1.8138801261829653) internal successors, (4025), 2227 states have internal predecessors, (4025), 140 states have call successors, (140), 78 states have call predecessors, (140), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2021-11-21 00:41:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 4305 transitions. [2021-11-21 00:41:25,879 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 4305 transitions. Word has length 68 [2021-11-21 00:41:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:25,880 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 4305 transitions. [2021-11-21 00:41:25,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 4305 transitions. [2021-11-21 00:41:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:41:25,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:25,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:25,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:41:25,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 2073715001, now seen corresponding path program 1 times [2021-11-21 00:41:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127288990] [2021-11-21 00:41:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:25,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 00:41:25,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:25,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127288990] [2021-11-21 00:41:25,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127288990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:25,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:25,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:25,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039149440] [2021-11-21 00:41:25,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:25,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:25,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:25,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:25,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:25,947 INFO L87 Difference]: Start difference. First operand 2439 states and 4305 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:41:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:26,399 INFO L93 Difference]: Finished difference Result 3626 states and 5863 transitions. [2021-11-21 00:41:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2021-11-21 00:41:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:26,419 INFO L225 Difference]: With dead ends: 3626 [2021-11-21 00:41:26,419 INFO L226 Difference]: Without dead ends: 2833 [2021-11-21 00:41:26,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:26,425 INFO L933 BasicCegarLoop]: 3174 mSDtfsCounter, 3341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3341 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:26,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3341 Valid, 3249 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:41:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-11-21 00:41:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2822. [2021-11-21 00:41:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2498 states have (on average 1.7502001601281025) internal successors, (4372), 2509 states have internal predecessors, (4372), 205 states have call successors, (205), 117 states have call predecessors, (205), 117 states have return successors, (205), 196 states have call predecessors, (205), 205 states have call successors, (205) [2021-11-21 00:41:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4782 transitions. [2021-11-21 00:41:26,561 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4782 transitions. Word has length 87 [2021-11-21 00:41:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:26,562 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 4782 transitions. [2021-11-21 00:41:26,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-21 00:41:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4782 transitions. [2021-11-21 00:41:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:41:26,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:26,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:26,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:41:26,574 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1328019882, now seen corresponding path program 1 times [2021-11-21 00:41:26,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:26,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060524581] [2021-11-21 00:41:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:26,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:41:26,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:26,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060524581] [2021-11-21 00:41:26,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060524581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:26,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944068457] [2021-11-21 00:41:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:26,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:26,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:26,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:26,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:41:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:26,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:26,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:41:26,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:26,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944068457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:26,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:26,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 00:41:26,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337040012] [2021-11-21 00:41:26,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:26,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:26,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:26,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:26,999 INFO L87 Difference]: Start difference. First operand 2822 states and 4782 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:27,491 INFO L93 Difference]: Finished difference Result 3874 states and 6153 transitions. [2021-11-21 00:41:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-21 00:41:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:27,512 INFO L225 Difference]: With dead ends: 3874 [2021-11-21 00:41:27,513 INFO L226 Difference]: Without dead ends: 3088 [2021-11-21 00:41:27,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:27,517 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 50 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:27,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 6332 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-11-21 00:41:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2927. [2021-11-21 00:41:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2585 states have (on average 1.7388781431334623) internal successors, (4495), 2596 states have internal predecessors, (4495), 214 states have call successors, (214), 126 states have call predecessors, (214), 126 states have return successors, (214), 205 states have call predecessors, (214), 214 states have call successors, (214) [2021-11-21 00:41:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4923 transitions. [2021-11-21 00:41:27,738 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4923 transitions. Word has length 101 [2021-11-21 00:41:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:27,738 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 4923 transitions. [2021-11-21 00:41:27,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4923 transitions. [2021-11-21 00:41:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:41:27,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:27,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:27,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:27,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:27,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 442263137, now seen corresponding path program 2 times [2021-11-21 00:41:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341937477] [2021-11-21 00:41:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:41:28,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341937477] [2021-11-21 00:41:28,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341937477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085461492] [2021-11-21 00:41:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:41:28,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:28,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:28,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:41:28,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:41:28,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:41:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:41:28,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:41:28,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 00:41:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085461492] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:29,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:41:29,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2021-11-21 00:41:29,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333605823] [2021-11-21 00:41:29,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:29,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:29,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:41:29,370 INFO L87 Difference]: Start difference. First operand 2927 states and 4923 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:30,305 INFO L93 Difference]: Finished difference Result 4210 states and 6617 transitions. [2021-11-21 00:41:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-21 00:41:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:30,333 INFO L225 Difference]: With dead ends: 4210 [2021-11-21 00:41:30,333 INFO L226 Difference]: Without dead ends: 3319 [2021-11-21 00:41:30,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:41:30,339 INFO L933 BasicCegarLoop]: 3171 mSDtfsCounter, 3356 mSDsluCounter, 3390 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 6327 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:30,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3356 Valid, 6327 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:41:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-11-21 00:41:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3255. [2021-11-21 00:41:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2877 states have (on average 1.686131386861314) internal successors, (4851), 2888 states have internal predecessors, (4851), 220 states have call successors, (220), 156 states have call predecessors, (220), 156 states have return successors, (236), 211 states have call predecessors, (236), 220 states have call successors, (236) [2021-11-21 00:41:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5307 transitions. [2021-11-21 00:41:30,582 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5307 transitions. Word has length 101 [2021-11-21 00:41:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:30,583 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 5307 transitions. [2021-11-21 00:41:30,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5307 transitions. [2021-11-21 00:41:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:41:30,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:30,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:30,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:30,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:41:30,810 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1346636857, now seen corresponding path program 1 times [2021-11-21 00:41:30,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:30,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583700912] [2021-11-21 00:41:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:30,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:41:30,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583700912] [2021-11-21 00:41:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583700912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:30,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174612143] [2021-11-21 00:41:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:30,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:30,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:30,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:30,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:41:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:41:31,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:31,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174612143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:31,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 00:41:31,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183945966] [2021-11-21 00:41:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:31,279 INFO L87 Difference]: Start difference. First operand 3255 states and 5307 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:31,934 INFO L93 Difference]: Finished difference Result 4699 states and 7181 transitions. [2021-11-21 00:41:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2021-11-21 00:41:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:31,966 INFO L225 Difference]: With dead ends: 4699 [2021-11-21 00:41:31,966 INFO L226 Difference]: Without dead ends: 3582 [2021-11-21 00:41:31,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:31,972 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 43 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6324 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:31,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 6324 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:41:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2021-11-21 00:41:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3392. [2021-11-21 00:41:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 2990 states have (on average 1.6755852842809364) internal successors, (5010), 3001 states have internal predecessors, (5010), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2021-11-21 00:41:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 5490 transitions. [2021-11-21 00:41:32,204 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 5490 transitions. Word has length 100 [2021-11-21 00:41:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:32,205 INFO L470 AbstractCegarLoop]: Abstraction has 3392 states and 5490 transitions. [2021-11-21 00:41:32,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 5490 transitions. [2021-11-21 00:41:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:41:32,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:32,212 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:32,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:32,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:32,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1916218461, now seen corresponding path program 2 times [2021-11-21 00:41:32,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003490506] [2021-11-21 00:41:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:32,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:41:32,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003490506] [2021-11-21 00:41:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003490506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:32,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147313411] [2021-11-21 00:41:32,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:41:32,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:32,492 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:32,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:41:32,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:41:32,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:41:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:41:32,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:32,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147313411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:32,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:32,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:41:32,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867196818] [2021-11-21 00:41:32,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:32,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:32,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:32,800 INFO L87 Difference]: Start difference. First operand 3392 states and 5490 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:33,368 INFO L93 Difference]: Finished difference Result 4654 states and 7185 transitions. [2021-11-21 00:41:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-21 00:41:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:33,396 INFO L225 Difference]: With dead ends: 4654 [2021-11-21 00:41:33,396 INFO L226 Difference]: Without dead ends: 3400 [2021-11-21 00:41:33,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:33,403 INFO L933 BasicCegarLoop]: 3193 mSDtfsCounter, 84 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6325 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:33,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 6325 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-11-21 00:41:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3380. [2021-11-21 00:41:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2978 states have (on average 1.6601746138347884) internal successors, (4944), 2989 states have internal predecessors, (4944), 232 states have call successors, (232), 168 states have call predecessors, (232), 168 states have return successors, (248), 223 states have call predecessors, (248), 232 states have call successors, (248) [2021-11-21 00:41:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5424 transitions. [2021-11-21 00:41:33,599 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5424 transitions. Word has length 100 [2021-11-21 00:41:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:33,600 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5424 transitions. [2021-11-21 00:41:33,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5424 transitions. [2021-11-21 00:41:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:41:33,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:33,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:33,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:33,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:41:33,826 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1449390339, now seen corresponding path program 1 times [2021-11-21 00:41:33,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679078080] [2021-11-21 00:41:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:33,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:41:33,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679078080] [2021-11-21 00:41:33,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679078080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363338472] [2021-11-21 00:41:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:33,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:33,908 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:33,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:41:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:41:34,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:41:34,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363338472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:34,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:34,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:41:34,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276195979] [2021-11-21 00:41:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:34,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:34,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:34,252 INFO L87 Difference]: Start difference. First operand 3380 states and 5424 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:34,740 INFO L93 Difference]: Finished difference Result 4822 states and 7231 transitions. [2021-11-21 00:41:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-21 00:41:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:34,754 INFO L225 Difference]: With dead ends: 4822 [2021-11-21 00:41:34,755 INFO L226 Difference]: Without dead ends: 3629 [2021-11-21 00:41:34,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:34,760 INFO L933 BasicCegarLoop]: 3148 mSDtfsCounter, 3351 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:34,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3351 Valid, 3166 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:41:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-11-21 00:41:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3629. [2021-11-21 00:41:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3197 states have (on average 1.6158898967782296) internal successors, (5166), 3208 states have internal predecessors, (5166), 238 states have call successors, (238), 192 states have call predecessors, (238), 192 states have return successors, (254), 229 states have call predecessors, (254), 238 states have call successors, (254) [2021-11-21 00:41:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5658 transitions. [2021-11-21 00:41:34,950 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5658 transitions. Word has length 100 [2021-11-21 00:41:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:34,951 INFO L470 AbstractCegarLoop]: Abstraction has 3629 states and 5658 transitions. [2021-11-21 00:41:34,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5658 transitions. [2021-11-21 00:41:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-21 00:41:34,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:34,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:34,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:35,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:35,178 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:35,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1330410284, now seen corresponding path program 1 times [2021-11-21 00:41:35,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:35,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658690303] [2021-11-21 00:41:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:35,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:41:35,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658690303] [2021-11-21 00:41:35,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658690303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390574282] [2021-11-21 00:41:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:35,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:35,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:35,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:41:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:41:35,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:35,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390574282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:35,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:35,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:41:35,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819833222] [2021-11-21 00:41:35,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:35,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:35,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:35,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:35,629 INFO L87 Difference]: Start difference. First operand 3629 states and 5658 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:36,329 INFO L93 Difference]: Finished difference Result 4993 states and 7391 transitions. [2021-11-21 00:41:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 100 [2021-11-21 00:41:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:36,344 INFO L225 Difference]: With dead ends: 4993 [2021-11-21 00:41:36,345 INFO L226 Difference]: Without dead ends: 3613 [2021-11-21 00:41:36,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:36,352 INFO L933 BasicCegarLoop]: 3201 mSDtfsCounter, 71 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:36,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6332 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:41:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-11-21 00:41:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3593. [2021-11-21 00:41:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3165 states have (on average 1.6018957345971565) internal successors, (5070), 3172 states have internal predecessors, (5070), 238 states have call successors, (238), 192 states have call predecessors, (238), 188 states have return successors, (250), 229 states have call predecessors, (250), 238 states have call successors, (250) [2021-11-21 00:41:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5558 transitions. [2021-11-21 00:41:36,597 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5558 transitions. Word has length 100 [2021-11-21 00:41:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:36,598 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 5558 transitions. [2021-11-21 00:41:36,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:41:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5558 transitions. [2021-11-21 00:41:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-21 00:41:36,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:36,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:36,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:41:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:36,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 552159624, now seen corresponding path program 1 times [2021-11-21 00:41:36,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445899211] [2021-11-21 00:41:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:36,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:41:36,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:36,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445899211] [2021-11-21 00:41:36,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445899211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:36,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830305245] [2021-11-21 00:41:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:36,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:36,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:36,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:36,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:41:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:41:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:41:37,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:37,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830305245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:37,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:37,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-21 00:41:37,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185953148] [2021-11-21 00:41:37,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:37,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:37,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:37,328 INFO L87 Difference]: Start difference. First operand 3593 states and 5558 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:38,035 INFO L93 Difference]: Finished difference Result 6244 states and 8732 transitions. [2021-11-21 00:41:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-21 00:41:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:38,049 INFO L225 Difference]: With dead ends: 6244 [2021-11-21 00:41:38,049 INFO L226 Difference]: Without dead ends: 4298 [2021-11-21 00:41:38,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:38,055 INFO L933 BasicCegarLoop]: 3160 mSDtfsCounter, 39 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6294 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:38,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 6294 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:41:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-11-21 00:41:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3781. [2021-11-21 00:41:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3317 states have (on average 1.587579137775098) internal successors, (5266), 3325 states have internal predecessors, (5266), 256 states have call successors, (256), 210 states have call predecessors, (256), 206 states have return successors, (268), 246 states have call predecessors, (268), 256 states have call successors, (268) [2021-11-21 00:41:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5790 transitions. [2021-11-21 00:41:38,230 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5790 transitions. Word has length 101 [2021-11-21 00:41:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:38,230 INFO L470 AbstractCegarLoop]: Abstraction has 3781 states and 5790 transitions. [2021-11-21 00:41:38,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5790 transitions. [2021-11-21 00:41:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 00:41:38,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:38,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:41:38,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:38,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:41:38,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2007390611, now seen corresponding path program 1 times [2021-11-21 00:41:38,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:38,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706860408] [2021-11-21 00:41:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:38,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:41:38,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706860408] [2021-11-21 00:41:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706860408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518184735] [2021-11-21 00:41:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:38,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:38,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:38,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:41:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:41:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:41:38,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:38,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518184735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:38,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:38,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-21 00:41:38,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256664917] [2021-11-21 00:41:38,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:38,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:41:38,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:41:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:38,941 INFO L87 Difference]: Start difference. First operand 3781 states and 5790 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 00:41:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:39,509 INFO L93 Difference]: Finished difference Result 5455 states and 7797 transitions. [2021-11-21 00:41:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:41:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2021-11-21 00:41:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:39,525 INFO L225 Difference]: With dead ends: 5455 [2021-11-21 00:41:39,526 INFO L226 Difference]: Without dead ends: 4358 [2021-11-21 00:41:39,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:39,531 INFO L933 BasicCegarLoop]: 3198 mSDtfsCounter, 6654 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6654 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:39,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6654 Valid, 3273 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:41:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-11-21 00:41:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4037. [2021-11-21 00:41:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 3538 states have (on average 1.5542679479932164) internal successors, (5499), 3552 states have internal predecessors, (5499), 268 states have call successors, (268), 229 states have call predecessors, (268), 229 states have return successors, (285), 256 states have call predecessors, (285), 268 states have call successors, (285) [2021-11-21 00:41:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 6052 transitions. [2021-11-21 00:41:39,736 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 6052 transitions. Word has length 102 [2021-11-21 00:41:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 4037 states and 6052 transitions. [2021-11-21 00:41:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 00:41:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 6052 transitions. [2021-11-21 00:41:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:41:39,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:39,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:39,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:41:39,958 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2112059429, now seen corresponding path program 1 times [2021-11-21 00:41:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570008221] [2021-11-21 00:41:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:39,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:41:40,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:40,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570008221] [2021-11-21 00:41:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570008221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:40,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:40,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:41:40,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368117579] [2021-11-21 00:41:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:40,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:41:40,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:41:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:41:40,036 INFO L87 Difference]: Start difference. First operand 4037 states and 6052 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:41,109 INFO L93 Difference]: Finished difference Result 6219 states and 8611 transitions. [2021-11-21 00:41:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:41:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-21 00:41:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:41,123 INFO L225 Difference]: With dead ends: 6219 [2021-11-21 00:41:41,124 INFO L226 Difference]: Without dead ends: 4913 [2021-11-21 00:41:41,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:41:41,128 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 74 mSDsluCounter, 10056 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 12560 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:41,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 12560 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:41:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-11-21 00:41:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4811. [2021-11-21 00:41:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4125 states have (on average 1.4926060606060607) internal successors, (6157), 4150 states have internal predecessors, (6157), 368 states have call successors, (368), 311 states have call predecessors, (368), 316 states have return successors, (419), 350 states have call predecessors, (419), 368 states have call successors, (419) [2021-11-21 00:41:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6944 transitions. [2021-11-21 00:41:41,394 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6944 transitions. Word has length 103 [2021-11-21 00:41:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 4811 states and 6944 transitions. [2021-11-21 00:41:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-21 00:41:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6944 transitions. [2021-11-21 00:41:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:41:41,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:41,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:41:41,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:41:41,403 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -24333977, now seen corresponding path program 1 times [2021-11-21 00:41:41,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155267143] [2021-11-21 00:41:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:41,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:41:41,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:41,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155267143] [2021-11-21 00:41:41,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155267143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:41,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772206250] [2021-11-21 00:41:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:41,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:41,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:41,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:41,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:41:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:41:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:41:41,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:41:41,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772206250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:41,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:41:41,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2021-11-21 00:41:41,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132636608] [2021-11-21 00:41:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:41,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:41:41,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:41:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:41:41,829 INFO L87 Difference]: Start difference. First operand 4811 states and 6944 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:41:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:43,005 INFO L93 Difference]: Finished difference Result 7904 states and 10557 transitions. [2021-11-21 00:41:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:41:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2021-11-21 00:41:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:43,028 INFO L225 Difference]: With dead ends: 7904 [2021-11-21 00:41:43,028 INFO L226 Difference]: Without dead ends: 5713 [2021-11-21 00:41:43,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:41:43,037 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 159 mSDsluCounter, 9981 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 12504 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:43,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 12504 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:41:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-11-21 00:41:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5463. [2021-11-21 00:41:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 4630 states have (on average 1.451403887688985) internal successors, (6720), 4658 states have internal predecessors, (6720), 452 states have call successors, (452), 377 states have call predecessors, (452), 379 states have return successors, (524), 428 states have call predecessors, (524), 452 states have call successors, (524) [2021-11-21 00:41:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7696 transitions. [2021-11-21 00:41:43,392 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7696 transitions. Word has length 103 [2021-11-21 00:41:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:43,392 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 7696 transitions. [2021-11-21 00:41:43,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:41:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7696 transitions. [2021-11-21 00:41:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 00:41:43,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:43,405 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:43,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:41:43,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:41:43,630 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash -159372150, now seen corresponding path program 1 times [2021-11-21 00:41:43,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:43,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696269448] [2021-11-21 00:41:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:43,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:41:43,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696269448] [2021-11-21 00:41:43,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696269448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:41:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845316814] [2021-11-21 00:41:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:43,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:41:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:41:43,864 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:41:43,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:41:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:41:44,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:41:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:41:44,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:41:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-21 00:41:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845316814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:41:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338293401] [2021-11-21 00:41:44,880 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-21 00:41:44,881 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:41:44,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:41:44,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:41:44,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:44:30,904 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 88 for LOIs [2021-11-21 00:44:31,820 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 209 for LOIs [2021-11-21 00:44:58,300 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 185 for LOIs [2021-11-21 00:44:59,813 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 88 for LOIs [2021-11-21 00:45:00,652 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2021-11-21 00:45:04,955 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 79 for LOIs [2021-11-21 00:45:17,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:45:35,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1338293401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:45:35,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:45:35,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [13, 8, 6] total 64 [2021-11-21 00:45:35,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668373070] [2021-11-21 00:45:35,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:45:35,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-21 00:45:35,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:45:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-21 00:45:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 00:45:35,873 INFO L87 Difference]: Start difference. First operand 5463 states and 7696 transitions. Second operand has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-21 00:47:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:57,750 INFO L93 Difference]: Finished difference Result 8990 states and 11782 transitions. [2021-11-21 00:47:57,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-21 00:47:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 109 [2021-11-21 00:47:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:57,770 INFO L225 Difference]: With dead ends: 8990 [2021-11-21 00:47:57,770 INFO L226 Difference]: Without dead ends: 5502 [2021-11-21 00:47:57,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 272 SyntacticMatches, 12 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9944 ImplicationChecksByTransitivity, 81.0s TimeCoverageRelationStatistics Valid=1952, Invalid=23808, Unknown=0, NotChecked=0, Total=25760 [2021-11-21 00:47:57,790 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 432 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 65873 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 4537 SdHoareTripleChecker+Invalid, 66130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 65873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:57,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 4537 Invalid, 66130 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [257 Valid, 65873 Invalid, 0 Unknown, 0 Unchecked, 78.2s Time] [2021-11-21 00:47:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-11-21 00:47:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5435. [2021-11-21 00:47:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5435 states, 4607 states have (on average 1.4512698068157153) internal successors, (6686), 4634 states have internal predecessors, (6686), 448 states have call successors, (448), 376 states have call predecessors, (448), 378 states have return successors, (520), 425 states have call predecessors, (520), 448 states have call successors, (520) [2021-11-21 00:47:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 7654 transitions. [2021-11-21 00:47:58,170 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 7654 transitions. Word has length 109 [2021-11-21 00:47:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 5435 states and 7654 transitions. [2021-11-21 00:47:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 12 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-21 00:47:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 7654 transitions. [2021-11-21 00:47:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-21 00:47:58,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:58,180 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:47:58,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:58,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:47:58,394 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash -725511275, now seen corresponding path program 1 times [2021-11-21 00:47:58,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:58,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269282863] [2021-11-21 00:47:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:58,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:47:58,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:47:58,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269282863] [2021-11-21 00:47:58,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269282863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:47:58,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705284210] [2021-11-21 00:47:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:58,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:47:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:58,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:47:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec42e657-7473-49b5-925c-50ffcf94f912/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:47:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:47:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:47:59,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-21 00:47:59,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705284210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:47:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347369034] [2021-11-21 00:47:59,500 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-21 00:47:59,500 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:47:59,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:47:59,501 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:47:59,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:51:00,698 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 180 for LOIs [2021-11-21 00:51:03,515 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:03,538 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:04,944 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 210 for LOIs [2021-11-21 00:51:07,872 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:07,891 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 00:51:09,495 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 185 for LOIs [2021-11-21 00:51:10,233 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 109 for LOIs [2021-11-21 00:51:10,586 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 88 for LOIs [2021-11-21 00:51:12,196 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 88 for LOIs [2021-11-21 00:51:28,529 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:51:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [347369034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:46,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:51:46,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [13, 8, 6] total 65 [2021-11-21 00:51:46,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165490130] [2021-11-21 00:51:46,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:46,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-21 00:51:46,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-21 00:51:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2021-11-21 00:51:46,906 INFO L87 Difference]: Start difference. First operand 5435 states and 7654 transitions. Second operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 34 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13)