./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI --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 aa31ba7b6b6c5a20100c4ed7bd6bb53a6560ae9fc8557479e094a44cc1bad058 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:32:09,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:32:09,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:32:09,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:32:09,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:32:09,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:32:09,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:32:09,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:32:09,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:32:09,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:32:09,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:32:09,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:32:09,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:32:09,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:32:09,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:32:09,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:32:09,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:32:09,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:32:09,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:32:09,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:32:09,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:32:09,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:32:09,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:32:09,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:32:09,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:32:09,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:32:09,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:32:09,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:32:09,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:32:09,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:32:09,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:32:09,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:32:09,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:32:09,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:32:09,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:32:09,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:32:09,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:32:09,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:32:09,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:32:09,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:32:09,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:32:09,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:32:09,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:32:09,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:32:09,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:32:09,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:32:09,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:32:09,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:32:09,244 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:32:09,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:32:09,245 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:32:09,245 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:32:09,245 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:32:09,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:32:09,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:32:09,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:32:09,246 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:32:09,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:32:09,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:32:09,247 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:32:09,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:32:09,248 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:32:09,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:32:09,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:32:09,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:32:09,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:32:09,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:32:09,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:32:09,249 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:32:09,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:32:09,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:32:09,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:32:09,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:32:09,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:32:09,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:09,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:32:09,254 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:32:09,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:32:09,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:32:09,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:32:09,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:32:09,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:32:09,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:32:09,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa31ba7b6b6c5a20100c4ed7bd6bb53a6560ae9fc8557479e094a44cc1bad058 [2022-11-03 02:32:09,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:32:09,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:32:09,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:32:09,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:32:09,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:32:09,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec8_product31.cil.c [2022-11-03 02:32:09,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/2c0afc1e9/3684385f05e64f92b80d04994ef663cb/FLAG7a18caf2e [2022-11-03 02:32:10,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:32:10,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c [2022-11-03 02:32:10,501 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/2c0afc1e9/3684385f05e64f92b80d04994ef663cb/FLAG7a18caf2e [2022-11-03 02:32:10,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/2c0afc1e9/3684385f05e64f92b80d04994ef663cb [2022-11-03 02:32:10,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:32:10,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:32:10,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:10,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:32:10,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:32:10,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:10" (1/1) ... [2022-11-03 02:32:10,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@571ced39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:10, skipping insertion in model container [2022-11-03 02:32:10,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:32:10" (1/1) ... [2022-11-03 02:32:10,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:32:10,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:32:11,300 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c[36672,36685] [2022-11-03 02:32:11,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:11,562 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:32:11,627 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c[36672,36685] [2022-11-03 02:32:11,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:32:11,709 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:32:11,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11 WrapperNode [2022-11-03 02:32:11,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:32:11,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:11,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:32:11,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:32:11,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,819 INFO L138 Inliner]: procedures = 132, calls = 223, calls flagged for inlining = 62, calls inlined = 57, statements flattened = 1032 [2022-11-03 02:32:11,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:32:11,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:32:11,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:32:11,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:32:11,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:32:11,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:32:11,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:32:11,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:32:11,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (1/1) ... [2022-11-03 02:32:11,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:32:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:11,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:32:11,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:32:12,010 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:32:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:32:12,010 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:32:12,010 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:32:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:32:12,011 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:32:12,011 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:32:12,011 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:32:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:32:12,012 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:32:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:32:12,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:32:12,012 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:32:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:32:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:32:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:32:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:32:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:32:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:32:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:32:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:32:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:32:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:32:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:32:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:32:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:32:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:32:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:32:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:32:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:32:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:32:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:32:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:32:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:32:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:32:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:32:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:32:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:32:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:32:12,017 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:32:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:32:12,017 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:32:12,017 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:32:12,018 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:32:12,018 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:32:12,019 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:32:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:32:12,020 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:32:12,021 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:32:12,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:32:12,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:32:12,364 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:32:12,380 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:32:13,511 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:32:14,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:32:14,169 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:32:14,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:14 BoogieIcfgContainer [2022-11-03 02:32:14,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:32:14,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:32:14,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:32:14,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:32:14,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:32:10" (1/3) ... [2022-11-03 02:32:14,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ec70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:14, skipping insertion in model container [2022-11-03 02:32:14,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:32:11" (2/3) ... [2022-11-03 02:32:14,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ec70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:32:14, skipping insertion in model container [2022-11-03 02:32:14,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:32:14" (3/3) ... [2022-11-03 02:32:14,185 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec8_product31.cil.c [2022-11-03 02:32:14,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:32:14,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:32:14,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:32:14,290 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ef44513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:32:14,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:32:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 121 states have internal predecessors, (154), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-03 02:32:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:32:14,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:14,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:14,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash -63531911, now seen corresponding path program 1 times [2022-11-03 02:32:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:14,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330643894] [2022-11-03 02:32:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:14,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:14,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330643894] [2022-11-03 02:32:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330643894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:14,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:14,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:32:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694339652] [2022-11-03 02:32:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:14,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:32:14,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:14,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:32:14,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:32:14,851 INFO L87 Difference]: Start difference. First operand has 201 states, 117 states have (on average 1.3162393162393162) internal successors, (154), 121 states have internal predecessors, (154), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:15,130 INFO L93 Difference]: Finished difference Result 319 states and 422 transitions. [2022-11-03 02:32:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:32:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 64 [2022-11-03 02:32:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:15,161 INFO L225 Difference]: With dead ends: 319 [2022-11-03 02:32:15,162 INFO L226 Difference]: Without dead ends: 198 [2022-11-03 02:32:15,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:32:15,180 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:15,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:32:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-03 02:32:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-03 02:32:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 118 states have internal predecessors, (148), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 02:32:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 265 transitions. [2022-11-03 02:32:15,302 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 265 transitions. Word has length 64 [2022-11-03 02:32:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 265 transitions. [2022-11-03 02:32:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2022-11-03 02:32:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:32:15,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:15,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:15,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:32:15,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1717630722, now seen corresponding path program 1 times [2022-11-03 02:32:15,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:15,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816477926] [2022-11-03 02:32:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:15,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816477926] [2022-11-03 02:32:15,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816477926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:15,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:15,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:32:15,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175081178] [2022-11-03 02:32:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:32:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:32:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:32:15,658 INFO L87 Difference]: Start difference. First operand 198 states and 265 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:15,869 INFO L93 Difference]: Finished difference Result 315 states and 410 transitions. [2022-11-03 02:32:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:32:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-11-03 02:32:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:15,879 INFO L225 Difference]: With dead ends: 315 [2022-11-03 02:32:15,879 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 02:32:15,885 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:32:15,887 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 0 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:15,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 455 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:32:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 02:32:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-11-03 02:32:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 117 states have (on average 1.2820512820512822) internal successors, (150), 120 states have internal predecessors, (150), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 02:32:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 267 transitions. [2022-11-03 02:32:15,931 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 267 transitions. Word has length 65 [2022-11-03 02:32:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:15,933 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 267 transitions. [2022-11-03 02:32:15,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 267 transitions. [2022-11-03 02:32:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:32:15,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:15,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:32:15,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash -641911519, now seen corresponding path program 1 times [2022-11-03 02:32:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:15,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888079553] [2022-11-03 02:32:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:15,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:16,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888079553] [2022-11-03 02:32:16,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888079553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:16,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:32:16,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:32:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637210128] [2022-11-03 02:32:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:16,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:32:16,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:32:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:32:16,202 INFO L87 Difference]: Start difference. First operand 200 states and 267 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:16,405 INFO L93 Difference]: Finished difference Result 430 states and 593 transitions. [2022-11-03 02:32:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:32:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-03 02:32:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:16,409 INFO L225 Difference]: With dead ends: 430 [2022-11-03 02:32:16,409 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:32:16,413 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:32:16,421 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 57 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:16,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 466 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:32:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:32:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2022-11-03 02:32:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 149 states have (on average 1.3624161073825503) internal successors, (203), 152 states have internal predecessors, (203), 70 states have call successors, (70), 23 states have call predecessors, (70), 23 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-03 02:32:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 342 transitions. [2022-11-03 02:32:16,464 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 342 transitions. Word has length 70 [2022-11-03 02:32:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:16,467 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 342 transitions. [2022-11-03 02:32:16,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:32:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 342 transitions. [2022-11-03 02:32:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:32:16,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:16,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:16,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:32:16,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1455442370, now seen corresponding path program 1 times [2022-11-03 02:32:16,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489969954] [2022-11-03 02:32:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:16,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:16,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489969954] [2022-11-03 02:32:16,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489969954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910023720] [2022-11-03 02:32:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:16,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:32:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:32:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:17,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:32:17,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910023720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872045590] [2022-11-03 02:32:17,517 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-03 02:32:17,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:17,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:17,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:17,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:54,045 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:32:54,499 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 448 for LOIs [2022-11-03 02:32:54,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:33:13,029 WARN L234 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 444 DAG size of output: 308 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:21,002 WARN L234 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 467 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:28,730 WARN L234 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 448 DAG size of output: 305 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:36,106 WARN L234 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 471 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:54,766 WARN L234 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 490 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:05,417 WARN L234 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 512 DAG size of output: 284 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:24,317 WARN L234 SmtUtils]: Spent 18.54s on a formula simplification. DAG size of input: 577 DAG size of output: 374 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:42,611 WARN L234 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 549 DAG size of output: 418 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:42,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [872045590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:42,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:34:42,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 26 [2022-11-03 02:34:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197081817] [2022-11-03 02:34:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:34:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:34:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:34:42,626 INFO L87 Difference]: Start difference. First operand 243 states and 342 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 02:34:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:51,661 INFO L93 Difference]: Finished difference Result 565 states and 845 transitions. [2022-11-03 02:34:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:34:51,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 71 [2022-11-03 02:34:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:51,665 INFO L225 Difference]: With dead ends: 565 [2022-11-03 02:34:51,666 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 02:34:51,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 107.7s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:34:51,668 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 137 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:51,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 3181 Invalid, 1800 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [15 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 02:34:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 02:34:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2022-11-03 02:34:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 171 states have (on average 1.3801169590643274) internal successors, (236), 174 states have internal predecessors, (236), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-03 02:34:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 375 transitions. [2022-11-03 02:34:51,866 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 375 transitions. Word has length 71 [2022-11-03 02:34:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:51,866 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 375 transitions. [2022-11-03 02:34:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-03 02:34:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 375 transitions. [2022-11-03 02:34:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:34:51,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:51,872 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:51,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:52,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:52,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1980173154, now seen corresponding path program 1 times [2022-11-03 02:34:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:52,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802101607] [2022-11-03 02:34:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:34:52,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802101607] [2022-11-03 02:34:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802101607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:52,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:52,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227354036] [2022-11-03 02:34:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:52,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:52,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:52,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:52,221 INFO L87 Difference]: Start difference. First operand 266 states and 375 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:34:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:52,622 INFO L93 Difference]: Finished difference Result 625 states and 914 transitions. [2022-11-03 02:34:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:52,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 76 [2022-11-03 02:34:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:52,626 INFO L225 Difference]: With dead ends: 625 [2022-11-03 02:34:52,627 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 02:34:52,628 INFO L412 NwaCegarLoop]: 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 [2022-11-03 02:34:52,629 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 55 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 475 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:34:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 02:34:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 378. [2022-11-03 02:34:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 258 states have (on average 1.441860465116279) internal successors, (372), 261 states have internal predecessors, (372), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 02:34:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 561 transitions. [2022-11-03 02:34:52,836 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 561 transitions. Word has length 76 [2022-11-03 02:34:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:52,836 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 561 transitions. [2022-11-03 02:34:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 02:34:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 561 transitions. [2022-11-03 02:34:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:34:52,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:52,840 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:52,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:34:52,840 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -685589800, now seen corresponding path program 1 times [2022-11-03 02:34:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:52,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483642483] [2022-11-03 02:34:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:52,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:34:53,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483642483] [2022-11-03 02:34:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483642483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:34:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184321206] [2022-11-03 02:34:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:53,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:34:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:34:53,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:34:53,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:34:53,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184321206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:53,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042227227] [2022-11-03 02:34:53,576 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-03 02:34:53,577 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:34:53,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:34:53,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:34:53,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:44,979 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:35:45,327 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 444 for LOIs [2022-11-03 02:35:45,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:59,709 WARN L234 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 444 DAG size of output: 308 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:06,481 WARN L234 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 467 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:13,027 WARN L234 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 444 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:19,265 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 467 DAG size of output: 348 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:36,398 WARN L234 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 490 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:58,324 WARN L234 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 588 DAG size of output: 336 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:11,732 WARN L234 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 590 DAG size of output: 336 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:25,008 WARN L234 SmtUtils]: Spent 11.83s on a formula simplification. DAG size of input: 589 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:38,524 WARN L234 SmtUtils]: Spent 11.89s on a formula simplification. DAG size of input: 587 DAG size of output: 335 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:45,136 WARN L234 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 572 DAG size of output: 354 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:55,877 WARN L234 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 572 DAG size of output: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:59,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2042227227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:37:59,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:37:59,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [4, 4, 4] total 30 [2022-11-03 02:37:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280604232] [2022-11-03 02:37:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:59,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:37:59,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:37:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:37:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:37:59,772 INFO L87 Difference]: Start difference. First operand 378 states and 561 transitions. Second operand has 25 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 02:38:23,002 WARN L234 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 530 DAG size of output: 369 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:40,719 WARN L234 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 562 DAG size of output: 374 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:48,857 INFO L93 Difference]: Finished difference Result 852 states and 1324 transitions. [2022-11-03 02:38:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:38:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) Word has length 77 [2022-11-03 02:38:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:48,862 INFO L225 Difference]: With dead ends: 852 [2022-11-03 02:38:48,862 INFO L226 Difference]: Without dead ends: 537 [2022-11-03 02:38:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 171.7s TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:38:48,865 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 264 mSDsluCounter, 3884 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 4000 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:48,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 4000 Invalid, 2537 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-03 02:38:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-03 02:38:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 440. [2022-11-03 02:38:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 316 states have (on average 1.490506329113924) internal successors, (471), 321 states have internal predecessors, (471), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 02:38:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 666 transitions. [2022-11-03 02:38:49,145 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 666 transitions. Word has length 77 [2022-11-03 02:38:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:49,145 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 666 transitions. [2022-11-03 02:38:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-03 02:38:49,146 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 666 transitions. [2022-11-03 02:38:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:38:49,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:49,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:49,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:49,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:38:49,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash 800362197, now seen corresponding path program 1 times [2022-11-03 02:38:49,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:38:49,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467988255] [2022-11-03 02:38:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:38:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:38:49,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:38:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467988255] [2022-11-03 02:38:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467988255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:49,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999171740] [2022-11-03 02:38:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:49,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:49,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:49,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:38:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:38:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:38:49,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:38:49,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999171740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:49,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175436863] [2022-11-03 02:38:49,912 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:38:49,912 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:38:49,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:38:49,913 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:38:49,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:39:28,366 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:39:28,685 INFO L197 IcfgInterpreter]: Interpreting procedure setClientKeyringPublicKey with input of size 236 for LOIs [2022-11-03 02:39:28,748 INFO L197 IcfgInterpreter]: Interpreting procedure setClientKeyringUser with input of size 245 for LOIs [2022-11-03 02:39:28,816 INFO L197 IcfgInterpreter]: Interpreting procedure createClientKeyringEntry with input of size 251 for LOIs [2022-11-03 02:39:28,901 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 448 for LOIs [2022-11-03 02:39:29,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:39:44,475 WARN L234 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 444 DAG size of output: 308 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:51,873 WARN L234 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 467 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:59,744 WARN L234 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 448 DAG size of output: 305 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:07,105 WARN L234 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 471 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:25,624 WARN L234 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 490 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:40:56,697 WARN L234 SmtUtils]: Spent 20.31s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:18,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1175436863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:18,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:41:18,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 4, 4] total 35 [2022-11-03 02:41:18,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514547517] [2022-11-03 02:41:18,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:18,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:41:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:18,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:41:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:41:18,428 INFO L87 Difference]: Start difference. First operand 440 states and 666 transitions. Second operand has 30 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-03 02:41:28,715 WARN L234 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 609 DAG size of output: 326 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:45,391 INFO L93 Difference]: Finished difference Result 914 states and 1425 transitions. [2022-11-03 02:41:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:41:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2022-11-03 02:41:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:45,395 INFO L225 Difference]: With dead ends: 914 [2022-11-03 02:41:45,395 INFO L226 Difference]: Without dead ends: 599 [2022-11-03 02:41:45,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 120.2s TimeCoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:41:45,398 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 202 mSDsluCounter, 3867 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 3987 SdHoareTripleChecker+Invalid, 3486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:45,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 3987 Invalid, 3486 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [16 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-11-03 02:41:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-03 02:41:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 525. [2022-11-03 02:41:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 393 states have (on average 1.5165394402035624) internal successors, (596), 400 states have internal predecessors, (596), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-03 02:41:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 801 transitions. [2022-11-03 02:41:45,766 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 801 transitions. Word has length 80 [2022-11-03 02:41:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:45,767 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 801 transitions. [2022-11-03 02:41:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-03 02:41:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 801 transitions. [2022-11-03 02:41:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 02:41:45,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:45,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:45,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:45,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:45,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash -180794591, now seen corresponding path program 1 times [2022-11-03 02:41:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:45,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837582202] [2022-11-03 02:41:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:45,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:41:46,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837582202] [2022-11-03 02:41:46,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837582202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:46,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418440871] [2022-11-03 02:41:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:46,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:46,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:46,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:46,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:41:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:41:46,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:41:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418440871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357109350] [2022-11-03 02:41:46,552 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:41:46,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:46,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:46,553 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:46,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:42:37,160 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:42:37,475 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 448 for LOIs [2022-11-03 02:42:37,791 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 483 for LOIs [2022-11-03 02:42:48,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:48,673 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:42:48,676 INFO L158 Benchmark]: Toolchain (without parser) took 638037.95ms. Allocated memory was 119.5MB in the beginning and 1.0GB in the end (delta: 885.0MB). Free memory was 82.6MB in the beginning and 653.7MB in the end (delta: -571.1MB). Peak memory consumption was 626.3MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,677 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 119.5MB. Free memory is still 101.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:42:48,677 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1065.54ms. Allocated memory is still 119.5MB. Free memory was 82.3MB in the beginning and 68.8MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,677 INFO L158 Benchmark]: Boogie Procedure Inliner took 108.61ms. Allocated memory is still 119.5MB. Free memory was 68.4MB in the beginning and 62.5MB in the end (delta: 5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,678 INFO L158 Benchmark]: Boogie Preprocessor took 72.56ms. Allocated memory is still 119.5MB. Free memory was 62.5MB in the beginning and 57.9MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,678 INFO L158 Benchmark]: RCFGBuilder took 2280.61ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 57.5MB in the beginning and 136.2MB in the end (delta: -78.8MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,679 INFO L158 Benchmark]: TraceAbstraction took 634498.92ms. Allocated memory was 174.1MB in the beginning and 1.0GB in the end (delta: 830.5MB). Free memory was 135.2MB in the beginning and 653.7MB in the end (delta: -518.5MB). Peak memory consumption was 626.0MB. Max. memory is 16.1GB. [2022-11-03 02:42:48,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 119.5MB. Free memory is still 101.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1065.54ms. Allocated memory is still 119.5MB. Free memory was 82.3MB in the beginning and 68.8MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 108.61ms. Allocated memory is still 119.5MB. Free memory was 68.4MB in the beginning and 62.5MB in the end (delta: 5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.56ms. Allocated memory is still 119.5MB. Free memory was 62.5MB in the beginning and 57.9MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2280.61ms. Allocated memory was 119.5MB in the beginning and 174.1MB in the end (delta: 54.5MB). Free memory was 57.5MB in the beginning and 136.2MB in the end (delta: -78.8MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. * TraceAbstraction took 634498.92ms. Allocated memory was 174.1MB in the beginning and 1.0GB in the end (delta: 830.5MB). Free memory was 135.2MB in the beginning and 653.7MB in the end (delta: -518.5MB). Peak memory consumption was 626.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:42:48,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI --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 aa31ba7b6b6c5a20100c4ed7bd6bb53a6560ae9fc8557479e094a44cc1bad058 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:42:51,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:42:51,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:42:51,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:42:51,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:42:51,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:42:51,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:42:51,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:42:51,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:42:51,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:42:51,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:42:51,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:42:51,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:42:51,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:42:51,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:42:51,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:42:51,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:42:51,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:42:51,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:42:51,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:42:51,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:42:51,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:42:51,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:42:51,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:42:51,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:42:51,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:42:51,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:42:51,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:42:51,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:42:51,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:42:51,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:42:51,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:42:51,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:42:51,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:42:51,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:42:51,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:42:51,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:42:51,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:42:51,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:42:51,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:42:51,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:42:51,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:42:51,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:42:51,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:42:51,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:42:51,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:42:51,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:42:51,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:42:51,327 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:42:51,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:42:51,328 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:42:51,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:42:51,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:42:51,328 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:42:51,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:42:51,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:42:51,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:42:51,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:42:51,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:42:51,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:42:51,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:42:51,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:51,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:42:51,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:42:51,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:42:51,334 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:42:51,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:51,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:42:51,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:42:51,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:42:51,335 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa31ba7b6b6c5a20100c4ed7bd6bb53a6560ae9fc8557479e094a44cc1bad058 [2022-11-03 02:42:51,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:42:51,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:42:51,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:42:51,738 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:42:51,739 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:42:51,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec8_product31.cil.c [2022-11-03 02:42:51,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/7f58170f8/04d8806d61144777babc5dde22f820a0/FLAG757eac2b7 [2022-11-03 02:42:52,601 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:42:52,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c [2022-11-03 02:42:52,624 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/7f58170f8/04d8806d61144777babc5dde22f820a0/FLAG757eac2b7 [2022-11-03 02:42:52,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/data/7f58170f8/04d8806d61144777babc5dde22f820a0 [2022-11-03 02:42:52,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:42:52,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:42:52,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:52,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:42:52,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:42:52,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7011bf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:52, skipping insertion in model container [2022-11-03 02:42:52,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:42:52" (1/1) ... [2022-11-03 02:42:52,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:42:52,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:53,375 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c[36672,36685] [2022-11-03 02:42:53,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:53,521 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:42:53,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:42:53,617 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c[36672,36685] [2022-11-03 02:42:53,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:53,703 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:42:53,790 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_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/sv-benchmarks/c/product-lines/email_spec8_product31.cil.c[36672,36685] [2022-11-03 02:42:53,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:42:53,884 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:42:53,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53 WrapperNode [2022-11-03 02:42:53,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:42:53,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:53,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:42:53,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:42:53,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:53,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:53,977 INFO L138 Inliner]: procedures = 134, calls = 223, calls flagged for inlining = 62, calls inlined = 57, statements flattened = 974 [2022-11-03 02:42:53,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:42:53,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:42:53,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:42:53,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:42:53,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:53,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:53,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,040 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:42:54,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:42:54,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:42:54,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:42:54,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (1/1) ... [2022-11-03 02:42:54,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:42:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:54,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:42:54,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:42:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:42:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:42:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:42:54,153 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:42:54,153 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:42:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:42:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:42:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:42:54,154 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:42:54,154 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:42:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:42:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:42:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:42:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:42:54,155 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:42:54,155 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:42:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:42:54,156 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:42:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:42:54,156 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:42:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:42:54,156 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:42:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:42:54,157 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:42:54,157 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:42:54,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:42:54,158 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:42:54,158 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:42:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:42:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:42:54,159 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:42:54,159 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:42:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:42:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:42:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:42:54,160 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:42:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:42:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:42:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:42:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:42:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:42:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:42:54,162 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:42:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:42:54,163 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:42:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:42:54,164 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:42:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:42:54,165 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:42:54,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:42:54,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:42:54,543 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:42:54,545 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:42:55,625 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:42:55,646 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:42:55,646 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:42:55,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:55 BoogieIcfgContainer [2022-11-03 02:42:55,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:42:55,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:42:55,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:42:55,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:42:55,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:42:52" (1/3) ... [2022-11-03 02:42:55,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbb1b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:55, skipping insertion in model container [2022-11-03 02:42:55,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:42:53" (2/3) ... [2022-11-03 02:42:55,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbb1b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:42:55, skipping insertion in model container [2022-11-03 02:42:55,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:42:55" (3/3) ... [2022-11-03 02:42:55,661 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec8_product31.cil.c [2022-11-03 02:42:55,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:42:55,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:42:55,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:42:55,798 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e99f126, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:42:55,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:42:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 370 states, 286 states have (on average 1.5) internal successors, (429), 290 states have internal predecessors, (429), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-03 02:42:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 02:42:55,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:55,835 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:55,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -873528409, now seen corresponding path program 1 times [2022-11-03 02:42:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:55,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733766123] [2022-11-03 02:42:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:55,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:55,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:42:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:42:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:42:56,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:56,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:56,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733766123] [2022-11-03 02:42:56,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733766123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:56,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:56,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:42:56,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266854256] [2022-11-03 02:42:56,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:56,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:42:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:42:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:56,421 INFO L87 Difference]: Start difference. First operand has 370 states, 286 states have (on average 1.5) internal successors, (429), 290 states have internal predecessors, (429), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:42:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:56,484 INFO L93 Difference]: Finished difference Result 586 states and 848 transitions. [2022-11-03 02:42:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:42:56,486 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2022-11-03 02:42:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:56,500 INFO L225 Difference]: With dead ends: 586 [2022-11-03 02:42:56,501 INFO L226 Difference]: Without dead ends: 363 [2022-11-03 02:42:56,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:42:56,512 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:56,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:42:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-03 02:42:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2022-11-03 02:42:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 280 states have (on average 1.4928571428571429) internal successors, (418), 283 states have internal predecessors, (418), 59 states have call successors, (59), 23 states have call predecessors, (59), 23 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 02:42:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 535 transitions. [2022-11-03 02:42:56,612 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 535 transitions. Word has length 101 [2022-11-03 02:42:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:56,614 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 535 transitions. [2022-11-03 02:42:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:42:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 535 transitions. [2022-11-03 02:42:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:42:56,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:56,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:56,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:56,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:56,838 INFO L85 PathProgramCache]: Analyzing trace with hash -238493020, now seen corresponding path program 1 times [2022-11-03 02:42:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523351814] [2022-11-03 02:42:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:56,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:56,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:56,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:42:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:42:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:57,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:57,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:57,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523351814] [2022-11-03 02:42:57,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523351814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:57,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478253410] [2022-11-03 02:42:57,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:57,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:57,328 INFO L87 Difference]: Start difference. First operand 363 states and 535 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:57,490 INFO L93 Difference]: Finished difference Result 717 states and 1060 transitions. [2022-11-03 02:42:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 102 [2022-11-03 02:42:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:57,496 INFO L225 Difference]: With dead ends: 717 [2022-11-03 02:42:57,496 INFO L226 Difference]: Without dead ends: 365 [2022-11-03 02:42:57,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:57,499 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 125 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:57,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1959 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:42:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-03 02:42:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-03 02:42:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 281 states have (on average 1.491103202846975) internal successors, (419), 285 states have internal predecessors, (419), 59 states have call successors, (59), 23 states have call predecessors, (59), 24 states have return successors, (60), 58 states have call predecessors, (60), 58 states have call successors, (60) [2022-11-03 02:42:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 538 transitions. [2022-11-03 02:42:57,536 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 538 transitions. Word has length 102 [2022-11-03 02:42:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 538 transitions. [2022-11-03 02:42:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 538 transitions. [2022-11-03 02:42:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:42:57,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:57,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:57,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:57,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1799351527, now seen corresponding path program 1 times [2022-11-03 02:42:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516777082] [2022-11-03 02:42:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:57,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:57,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:42:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:42:58,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:58,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516777082] [2022-11-03 02:42:58,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516777082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:58,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:58,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:58,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923096860] [2022-11-03 02:42:58,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:58,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:58,164 INFO L87 Difference]: Start difference. First operand 365 states and 538 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:58,278 INFO L93 Difference]: Finished difference Result 719 states and 1064 transitions. [2022-11-03 02:42:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 103 [2022-11-03 02:42:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:58,282 INFO L225 Difference]: With dead ends: 719 [2022-11-03 02:42:58,283 INFO L226 Difference]: Without dead ends: 367 [2022-11-03 02:42:58,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:58,292 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 124 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:58,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1948 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:42:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-03 02:42:58,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-11-03 02:42:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.4893617021276595) internal successors, (420), 287 states have internal predecessors, (420), 59 states have call successors, (59), 23 states have call predecessors, (59), 25 states have return successors, (64), 58 states have call predecessors, (64), 58 states have call successors, (64) [2022-11-03 02:42:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 543 transitions. [2022-11-03 02:42:58,333 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 543 transitions. Word has length 103 [2022-11-03 02:42:58,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:58,334 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 543 transitions. [2022-11-03 02:42:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 543 transitions. [2022-11-03 02:42:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 02:42:58,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:58,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:58,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:58,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash 543209139, now seen corresponding path program 1 times [2022-11-03 02:42:58,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:58,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320505697] [2022-11-03 02:42:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:58,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:58,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:42:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:42:58,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:58,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:58,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320505697] [2022-11-03 02:42:58,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320505697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:58,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:58,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:42:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842393032] [2022-11-03 02:42:58,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:58,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:58,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:58,959 INFO L87 Difference]: Start difference. First operand 367 states and 543 transitions. Second operand has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:59,051 INFO L93 Difference]: Finished difference Result 711 states and 1054 transitions. [2022-11-03 02:42:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2022-11-03 02:42:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:59,055 INFO L225 Difference]: With dead ends: 711 [2022-11-03 02:42:59,055 INFO L226 Difference]: Without dead ends: 367 [2022-11-03 02:42:59,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:59,058 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 123 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:59,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1962 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:42:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-03 02:42:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-11-03 02:42:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 282 states have (on average 1.4893617021276595) internal successors, (420), 287 states have internal predecessors, (420), 59 states have call successors, (59), 23 states have call predecessors, (59), 25 states have return successors, (63), 58 states have call predecessors, (63), 58 states have call successors, (63) [2022-11-03 02:42:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 542 transitions. [2022-11-03 02:42:59,090 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 542 transitions. Word has length 104 [2022-11-03 02:42:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,091 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 542 transitions. [2022-11-03 02:42:59,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.25) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:42:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 542 transitions. [2022-11-03 02:42:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 02:42:59,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:59,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:59,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:59,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1576837622, now seen corresponding path program 2 times [2022-11-03 02:42:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075563194] [2022-11-03 02:42:59,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:42:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:59,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:59,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:42:59,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 02:42:59,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:42:59,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:59,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075563194] [2022-11-03 02:42:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075563194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:59,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:59,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:59,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427114586] [2022-11-03 02:42:59,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:59,604 INFO L87 Difference]: Start difference. First operand 367 states and 542 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:42:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:59,639 INFO L93 Difference]: Finished difference Result 580 states and 836 transitions. [2022-11-03 02:42:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-11-03 02:42:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:59,643 INFO L225 Difference]: With dead ends: 580 [2022-11-03 02:42:59,643 INFO L226 Difference]: Without dead ends: 370 [2022-11-03 02:42:59,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:59,646 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 1 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:59,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1064 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:42:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-03 02:42:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 369. [2022-11-03 02:42:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 284 states have (on average 1.4859154929577465) internal successors, (422), 289 states have internal predecessors, (422), 59 states have call successors, (59), 23 states have call predecessors, (59), 25 states have return successors, (63), 58 states have call predecessors, (63), 58 states have call successors, (63) [2022-11-03 02:42:59,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 544 transitions. [2022-11-03 02:42:59,689 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 544 transitions. Word has length 105 [2022-11-03 02:42:59,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:59,690 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 544 transitions. [2022-11-03 02:42:59,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:42:59,690 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 544 transitions. [2022-11-03 02:42:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:42:59,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:59,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:59,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:59,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1511051859, now seen corresponding path program 1 times [2022-11-03 02:42:59,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:59,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744359988] [2022-11-03 02:42:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:59,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:59,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:59,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:43:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:43:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:43:00,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:00,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744359988] [2022-11-03 02:43:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744359988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:00,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:00,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:00,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837381797] [2022-11-03 02:43:00,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:00,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:00,280 INFO L87 Difference]: Start difference. First operand 369 states and 544 transitions. Second operand has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:00,364 INFO L93 Difference]: Finished difference Result 717 states and 1061 transitions. [2022-11-03 02:43:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 111 [2022-11-03 02:43:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:00,368 INFO L225 Difference]: With dead ends: 717 [2022-11-03 02:43:00,368 INFO L226 Difference]: Without dead ends: 371 [2022-11-03 02:43:00,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:00,370 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 121 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1964 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-03 02:43:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-03 02:43:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.4842105263157894) internal successors, (423), 291 states have internal predecessors, (423), 59 states have call successors, (59), 23 states have call predecessors, (59), 26 states have return successors, (65), 58 states have call predecessors, (65), 58 states have call successors, (65) [2022-11-03 02:43:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 547 transitions. [2022-11-03 02:43:00,415 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 547 transitions. Word has length 111 [2022-11-03 02:43:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:00,415 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 547 transitions. [2022-11-03 02:43:00,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 18.75) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 547 transitions. [2022-11-03 02:43:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:43:00,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:00,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:00,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:00,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1704038921, now seen corresponding path program 1 times [2022-11-03 02:43:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373730094] [2022-11-03 02:43:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:00,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:00,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:43:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:43:00,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:00,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:00,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373730094] [2022-11-03 02:43:00,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373730094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:01,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:01,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146338066] [2022-11-03 02:43:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:01,002 INFO L87 Difference]: Start difference. First operand 371 states and 547 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:01,099 INFO L93 Difference]: Finished difference Result 715 states and 1056 transitions. [2022-11-03 02:43:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 112 [2022-11-03 02:43:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:01,102 INFO L225 Difference]: With dead ends: 715 [2022-11-03 02:43:01,103 INFO L226 Difference]: Without dead ends: 371 [2022-11-03 02:43:01,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:01,105 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 122 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:01,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1951 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-03 02:43:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-03 02:43:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.4842105263157894) internal successors, (423), 291 states have internal predecessors, (423), 59 states have call successors, (59), 23 states have call predecessors, (59), 26 states have return successors, (64), 58 states have call predecessors, (64), 58 states have call successors, (64) [2022-11-03 02:43:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 546 transitions. [2022-11-03 02:43:01,132 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 546 transitions. Word has length 112 [2022-11-03 02:43:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:01,132 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 546 transitions. [2022-11-03 02:43:01,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 546 transitions. [2022-11-03 02:43:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:43:01,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:01,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:01,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:01,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:01,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash -608525205, now seen corresponding path program 2 times [2022-11-03 02:43:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:01,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729695580] [2022-11-03 02:43:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:43:01,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:01,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:01,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:43:01,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:43:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:43:01,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:01,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729695580] [2022-11-03 02:43:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729695580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:01,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:01,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107217623] [2022-11-03 02:43:01,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:01,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:01,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:01,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:01,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:01,786 INFO L87 Difference]: Start difference. First operand 371 states and 546 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:01,898 INFO L93 Difference]: Finished difference Result 717 states and 1061 transitions. [2022-11-03 02:43:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:01,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2022-11-03 02:43:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:01,902 INFO L225 Difference]: With dead ends: 717 [2022-11-03 02:43:01,902 INFO L226 Difference]: Without dead ends: 373 [2022-11-03 02:43:01,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:01,905 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 120 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:01,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1953 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-03 02:43:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-11-03 02:43:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 286 states have (on average 1.4825174825174825) internal successors, (424), 293 states have internal predecessors, (424), 59 states have call successors, (59), 23 states have call predecessors, (59), 27 states have return successors, (68), 58 states have call predecessors, (68), 58 states have call successors, (68) [2022-11-03 02:43:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 551 transitions. [2022-11-03 02:43:01,931 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 551 transitions. Word has length 113 [2022-11-03 02:43:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:01,932 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 551 transitions. [2022-11-03 02:43:01,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:43:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 551 transitions. [2022-11-03 02:43:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:43:01,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:01,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:01,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:02,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash -531161198, now seen corresponding path program 1 times [2022-11-03 02:43:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021011490] [2022-11-03 02:43:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:02,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:02,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:43:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:43:02,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:02,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:02,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021011490] [2022-11-03 02:43:02,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021011490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:02,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:02,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255399127] [2022-11-03 02:43:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:02,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:02,465 INFO L87 Difference]: Start difference. First operand 373 states and 551 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:43:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:02,524 INFO L93 Difference]: Finished difference Result 772 states and 1155 transitions. [2022-11-03 02:43:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:02,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2022-11-03 02:43:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:02,528 INFO L225 Difference]: With dead ends: 772 [2022-11-03 02:43:02,528 INFO L226 Difference]: Without dead ends: 430 [2022-11-03 02:43:02,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:02,532 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 107 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:02,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1039 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-03 02:43:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 422. [2022-11-03 02:43:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 324 states have (on average 1.5) internal successors, (486), 331 states have internal predecessors, (486), 70 states have call successors, (70), 23 states have call predecessors, (70), 27 states have return successors, (81), 69 states have call predecessors, (81), 69 states have call successors, (81) [2022-11-03 02:43:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 637 transitions. [2022-11-03 02:43:02,571 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 637 transitions. Word has length 114 [2022-11-03 02:43:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:02,572 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 637 transitions. [2022-11-03 02:43:02,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:43:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 637 transitions. [2022-11-03 02:43:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:43:02,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:02,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:02,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:02,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash -278494295, now seen corresponding path program 1 times [2022-11-03 02:43:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330884858] [2022-11-03 02:43:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:02,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:02,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:02,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:43:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:03,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:43:03,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:43:03,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330884858] [2022-11-03 02:43:03,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330884858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [621581720] [2022-11-03 02:43:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:03,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:03,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:03,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:03,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:43:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:03,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:43:03,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:03,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [621581720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:03,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:03,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 7 [2022-11-03 02:43:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287521033] [2022-11-03 02:43:03,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:03,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:03,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:03,832 INFO L87 Difference]: Start difference. First operand 422 states and 637 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:43:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:03,878 INFO L93 Difference]: Finished difference Result 703 states and 1030 transitions. [2022-11-03 02:43:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2022-11-03 02:43:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:03,882 INFO L225 Difference]: With dead ends: 703 [2022-11-03 02:43:03,882 INFO L226 Difference]: Without dead ends: 496 [2022-11-03 02:43:03,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:43:03,884 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 274 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:03,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 819 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-11-03 02:43:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-11-03 02:43:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 384 states have (on average 1.5052083333333333) internal successors, (578), 391 states have internal predecessors, (578), 76 states have call successors, (76), 32 states have call predecessors, (76), 35 states have return successors, (87), 75 states have call predecessors, (87), 75 states have call successors, (87) [2022-11-03 02:43:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 741 transitions. [2022-11-03 02:43:03,928 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 741 transitions. Word has length 115 [2022-11-03 02:43:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:03,929 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 741 transitions. [2022-11-03 02:43:03,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:43:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 741 transitions. [2022-11-03 02:43:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-03 02:43:03,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:03,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:03,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:04,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:04,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:04,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash 512431726, now seen corresponding path program 1 times [2022-11-03 02:43:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:04,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238454468] [2022-11-03 02:43:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:04,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:04,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:43:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:43:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:43:05,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:05,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238454468] [2022-11-03 02:43:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238454468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988886600] [2022-11-03 02:43:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:05,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:05,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:05,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:05,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:43:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:43:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:43:05,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:43:06,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988886600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:06,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933784798] [2022-11-03 02:43:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:06,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:06,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:43:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:43:06,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:43:06,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:43:07,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933784798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:07,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:07,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 9, 10, 9, 10] total 21 [2022-11-03 02:43:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204646122] [2022-11-03 02:43:07,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:43:07,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:43:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:43:07,493 INFO L87 Difference]: Start difference. First operand 496 states and 741 transitions. Second operand has 21 states, 21 states have (on average 13.476190476190476) internal successors, (283), 19 states have internal predecessors, (283), 5 states have call successors, (60), 5 states have call predecessors, (60), 10 states have return successors, (63), 7 states have call predecessors, (63), 5 states have call successors, (63) [2022-11-03 02:43:21,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:21,413 INFO L93 Difference]: Finished difference Result 3078 states and 4818 transitions. [2022-11-03 02:43:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:43:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 13.476190476190476) internal successors, (283), 19 states have internal predecessors, (283), 5 states have call successors, (60), 5 states have call predecessors, (60), 10 states have return successors, (63), 7 states have call predecessors, (63), 5 states have call successors, (63) Word has length 205 [2022-11-03 02:43:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:21,430 INFO L225 Difference]: With dead ends: 3078 [2022-11-03 02:43:21,431 INFO L226 Difference]: Without dead ends: 2792 [2022-11-03 02:43:21,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1266 GetRequests, 1217 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:43:21,437 INFO L413 NwaCegarLoop]: 1463 mSDtfsCounter, 4764 mSDsluCounter, 5159 mSDsCounter, 0 mSdLazyCounter, 12052 mSolverCounterSat, 1526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4846 SdHoareTripleChecker+Valid, 6622 SdHoareTripleChecker+Invalid, 13578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1526 IncrementalHoareTripleChecker+Valid, 12052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:21,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4846 Valid, 6622 Invalid, 13578 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1526 Valid, 12052 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-03 02:43:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-11-03 02:43:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2049. [2022-11-03 02:43:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1620 states have (on average 1.5851851851851853) internal successors, (2568), 1629 states have internal predecessors, (2568), 346 states have call successors, (346), 73 states have call predecessors, (346), 82 states have return successors, (415), 352 states have call predecessors, (415), 344 states have call successors, (415) [2022-11-03 02:43:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 3329 transitions. [2022-11-03 02:43:21,722 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 3329 transitions. Word has length 205 [2022-11-03 02:43:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:21,723 INFO L495 AbstractCegarLoop]: Abstraction has 2049 states and 3329 transitions. [2022-11-03 02:43:21,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.476190476190476) internal successors, (283), 19 states have internal predecessors, (283), 5 states have call successors, (60), 5 states have call predecessors, (60), 10 states have return successors, (63), 7 states have call predecessors, (63), 5 states have call successors, (63) [2022-11-03 02:43:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 3329 transitions. [2022-11-03 02:43:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-03 02:43:21,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:21,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:21,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:21,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:22,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:22,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:22,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:22,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1987788931, now seen corresponding path program 1 times [2022-11-03 02:43:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:22,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781556379] [2022-11-03 02:43:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:22,365 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:22,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:43:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:22,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:43:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 02:43:22,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:22,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:22,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781556379] [2022-11-03 02:43:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781556379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:22,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:22,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678995126] [2022-11-03 02:43:22,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:22,768 INFO L87 Difference]: Start difference. First operand 2049 states and 3329 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:23,090 INFO L93 Difference]: Finished difference Result 3135 states and 5088 transitions. [2022-11-03 02:43:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 212 [2022-11-03 02:43:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:23,106 INFO L225 Difference]: With dead ends: 3135 [2022-11-03 02:43:23,106 INFO L226 Difference]: Without dead ends: 1910 [2022-11-03 02:43:23,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:23,113 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 128 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:23,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1943 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:43:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-03 02:43:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1904. [2022-11-03 02:43:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1508 states have (on average 1.58289124668435) internal successors, (2387), 1513 states have internal predecessors, (2387), 317 states have call successors, (317), 72 states have call predecessors, (317), 78 states have return successors, (377), 324 states have call predecessors, (377), 315 states have call successors, (377) [2022-11-03 02:43:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 3081 transitions. [2022-11-03 02:43:23,403 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 3081 transitions. Word has length 212 [2022-11-03 02:43:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 1904 states and 3081 transitions. [2022-11-03 02:43:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 3081 transitions. [2022-11-03 02:43:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-03 02:43:23,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:23,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:23,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:23,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:23,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2115767903, now seen corresponding path program 1 times [2022-11-03 02:43:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:23,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416680159] [2022-11-03 02:43:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:23,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:43:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:24,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:24,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416680159] [2022-11-03 02:43:24,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416680159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:24,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:24,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666557887] [2022-11-03 02:43:24,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:24,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:24,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:24,035 INFO L87 Difference]: Start difference. First operand 1904 states and 3081 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:24,352 INFO L93 Difference]: Finished difference Result 4487 states and 7368 transitions. [2022-11-03 02:43:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 213 [2022-11-03 02:43:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:24,367 INFO L225 Difference]: With dead ends: 4487 [2022-11-03 02:43:24,367 INFO L226 Difference]: Without dead ends: 2655 [2022-11-03 02:43:24,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:24,374 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 105 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:24,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1082 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2022-11-03 02:43:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2639. [2022-11-03 02:43:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2101 states have (on average 1.5935268919562113) internal successors, (3348), 2100 states have internal predecessors, (3348), 459 states have call successors, (459), 72 states have call predecessors, (459), 78 states have return successors, (554), 472 states have call predecessors, (554), 457 states have call successors, (554) [2022-11-03 02:43:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4361 transitions. [2022-11-03 02:43:24,745 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4361 transitions. Word has length 213 [2022-11-03 02:43:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:24,745 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4361 transitions. [2022-11-03 02:43:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4361 transitions. [2022-11-03 02:43:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-03 02:43:24,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:24,761 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:24,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:24,974 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:24,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1493342445, now seen corresponding path program 1 times [2022-11-03 02:43:24,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:24,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924057965] [2022-11-03 02:43:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:24,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:24,977 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:24,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:43:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:25,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:25,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:25,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924057965] [2022-11-03 02:43:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924057965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:25,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:25,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:25,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377878657] [2022-11-03 02:43:25,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:25,378 INFO L87 Difference]: Start difference. First operand 2639 states and 4361 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:25,834 INFO L93 Difference]: Finished difference Result 6227 states and 10391 transitions. [2022-11-03 02:43:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 214 [2022-11-03 02:43:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:25,857 INFO L225 Difference]: With dead ends: 6227 [2022-11-03 02:43:25,858 INFO L226 Difference]: Without dead ends: 3916 [2022-11-03 02:43:25,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:25,867 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 103 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:25,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1075 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2022-11-03 02:43:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3900. [2022-11-03 02:43:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3119 states have (on average 1.604360371914075) internal successors, (5004), 3112 states have internal predecessors, (5004), 702 states have call successors, (702), 72 states have call predecessors, (702), 78 states have return successors, (839), 721 states have call predecessors, (839), 700 states have call successors, (839) [2022-11-03 02:43:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 6545 transitions. [2022-11-03 02:43:26,566 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 6545 transitions. Word has length 214 [2022-11-03 02:43:26,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:26,566 INFO L495 AbstractCegarLoop]: Abstraction has 3900 states and 6545 transitions. [2022-11-03 02:43:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 6545 transitions. [2022-11-03 02:43:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-03 02:43:26,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:26,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:26,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:26,806 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash -103665405, now seen corresponding path program 1 times [2022-11-03 02:43:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323779246] [2022-11-03 02:43:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:26,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:26,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:43:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:27,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:27,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323779246] [2022-11-03 02:43:27,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323779246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:27,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:27,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566846988] [2022-11-03 02:43:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:27,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:27,210 INFO L87 Difference]: Start difference. First operand 3900 states and 6545 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:27,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:27,908 INFO L93 Difference]: Finished difference Result 9317 states and 15782 transitions. [2022-11-03 02:43:27,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:27,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 215 [2022-11-03 02:43:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:27,938 INFO L225 Difference]: With dead ends: 9317 [2022-11-03 02:43:27,939 INFO L226 Difference]: Without dead ends: 5795 [2022-11-03 02:43:27,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:27,950 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 101 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:27,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1069 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2022-11-03 02:43:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5779. [2022-11-03 02:43:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 4699 states have (on average 1.6116194935092574) internal successors, (7573), 4681 states have internal predecessors, (7573), 1001 states have call successors, (1001), 72 states have call predecessors, (1001), 78 states have return successors, (1223), 1031 states have call predecessors, (1223), 999 states have call successors, (1223) [2022-11-03 02:43:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 9797 transitions. [2022-11-03 02:43:28,819 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 9797 transitions. Word has length 215 [2022-11-03 02:43:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:28,820 INFO L495 AbstractCegarLoop]: Abstraction has 5779 states and 9797 transitions. [2022-11-03 02:43:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 9797 transitions. [2022-11-03 02:43:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-03 02:43:28,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:28,851 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:28,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:29,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:29,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1693723214, now seen corresponding path program 1 times [2022-11-03 02:43:29,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:29,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617961177] [2022-11-03 02:43:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:29,068 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:29,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:43:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:29,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:29,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617961177] [2022-11-03 02:43:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617961177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:29,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:29,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514426377] [2022-11-03 02:43:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:29,451 INFO L87 Difference]: Start difference. First operand 5779 states and 9797 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:30,371 INFO L93 Difference]: Finished difference Result 13977 states and 23909 transitions. [2022-11-03 02:43:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 216 [2022-11-03 02:43:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:30,418 INFO L225 Difference]: With dead ends: 13977 [2022-11-03 02:43:30,418 INFO L226 Difference]: Without dead ends: 8919 [2022-11-03 02:43:30,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:30,437 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 99 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1069 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8919 states. [2022-11-03 02:43:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8919 to 8903. [2022-11-03 02:43:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 7372 states have (on average 1.6181497558328812) internal successors, (11929), 7340 states have internal predecessors, (11929), 1452 states have call successors, (1452), 72 states have call predecessors, (1452), 78 states have return successors, (1823), 1496 states have call predecessors, (1823), 1450 states have call successors, (1823) [2022-11-03 02:43:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 15204 transitions. [2022-11-03 02:43:32,015 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 15204 transitions. Word has length 216 [2022-11-03 02:43:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:32,015 INFO L495 AbstractCegarLoop]: Abstraction has 8903 states and 15204 transitions. [2022-11-03 02:43:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 15204 transitions. [2022-11-03 02:43:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-03 02:43:32,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:32,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:32,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:32,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:32,277 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:32,277 INFO L85 PathProgramCache]: Analyzing trace with hash 979445375, now seen corresponding path program 1 times [2022-11-03 02:43:32,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:32,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053727514] [2022-11-03 02:43:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:32,279 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:43:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:32,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:32,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:32,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053727514] [2022-11-03 02:43:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053727514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:32,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:32,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953664193] [2022-11-03 02:43:32,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:32,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:32,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:32,665 INFO L87 Difference]: Start difference. First operand 8903 states and 15204 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:33,923 INFO L93 Difference]: Finished difference Result 22008 states and 37923 transitions. [2022-11-03 02:43:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 217 [2022-11-03 02:43:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:33,983 INFO L225 Difference]: With dead ends: 22008 [2022-11-03 02:43:33,983 INFO L226 Difference]: Without dead ends: 14310 [2022-11-03 02:43:34,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:34,007 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 97 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:34,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1075 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14310 states. [2022-11-03 02:43:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14310 to 14294. [2022-11-03 02:43:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14294 states, 11770 states have (on average 1.6148683092608327) internal successors, (19007), 11721 states have internal predecessors, (19007), 2445 states have call successors, (2445), 72 states have call predecessors, (2445), 78 states have return successors, (3089), 2506 states have call predecessors, (3089), 2443 states have call successors, (3089) [2022-11-03 02:43:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14294 states to 14294 states and 24541 transitions. [2022-11-03 02:43:36,339 INFO L78 Accepts]: Start accepts. Automaton has 14294 states and 24541 transitions. Word has length 217 [2022-11-03 02:43:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:36,339 INFO L495 AbstractCegarLoop]: Abstraction has 14294 states and 24541 transitions. [2022-11-03 02:43:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 14294 states and 24541 transitions. [2022-11-03 02:43:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:43:36,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:36,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:36,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-03 02:43:36,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:36,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1924402990, now seen corresponding path program 1 times [2022-11-03 02:43:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:36,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392949540] [2022-11-03 02:43:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:36,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:36,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:36,619 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:36,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:43:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:37,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:37,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392949540] [2022-11-03 02:43:37,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392949540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:37,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:37,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31513266] [2022-11-03 02:43:37,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:37,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:37,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:37,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:37,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:37,020 INFO L87 Difference]: Start difference. First operand 14294 states and 24541 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:39,503 INFO L93 Difference]: Finished difference Result 37474 states and 64604 transitions. [2022-11-03 02:43:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:43:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 218 [2022-11-03 02:43:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:39,616 INFO L225 Difference]: With dead ends: 37474 [2022-11-03 02:43:39,617 INFO L226 Difference]: Without dead ends: 24953 [2022-11-03 02:43:39,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:39,655 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 95 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:39,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1074 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:43:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2022-11-03 02:43:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24937. [2022-11-03 02:43:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24937 states, 20664 states have (on average 1.613966318234611) internal successors, (33351), 20609 states have internal predecessors, (33351), 4194 states have call successors, (4194), 72 states have call predecessors, (4194), 78 states have return successors, (5165), 4261 states have call predecessors, (5165), 4192 states have call successors, (5165) [2022-11-03 02:43:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24937 states to 24937 states and 42710 transitions. [2022-11-03 02:43:43,968 INFO L78 Accepts]: Start accepts. Automaton has 24937 states and 42710 transitions. Word has length 218 [2022-11-03 02:43:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:43,969 INFO L495 AbstractCegarLoop]: Abstraction has 24937 states and 42710 transitions. [2022-11-03 02:43:43,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 02:43:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 24937 states and 42710 transitions. [2022-11-03 02:43:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-03 02:43:44,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:44,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:44,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:44,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,309 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1882203347, now seen corresponding path program 1 times [2022-11-03 02:43:44,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:44,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86327443] [2022-11-03 02:43:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:44,312 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:44,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3538bb7d-9533-44a4-aed1-4b78cbeecbb5/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:43:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:43:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-03 02:43:44,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:44,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:44,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86327443] [2022-11-03 02:43:44,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86327443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:44,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:44,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:43:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493562386] [2022-11-03 02:43:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:44,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:43:44,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:43:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:43:44,777 INFO L87 Difference]: Start difference. First operand 24937 states and 42710 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20)