./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0 --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 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a --- 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-e04fb08 [2022-11-16 19:34:43,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:34:43,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:34:43,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:34:43,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:34:43,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:34:43,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:34:43,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:34:43,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:34:43,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:34:43,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:34:43,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:34:43,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:34:43,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:34:43,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:34:43,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:34:43,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:34:43,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:34:43,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:34:43,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:34:43,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:34:43,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:34:43,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:34:43,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:34:43,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:34:43,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:34:43,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:34:43,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:34:43,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:34:43,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:34:43,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:34:43,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:34:43,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:34:43,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:34:43,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:34:43,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:34:43,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:34:43,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:34:43,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:34:43,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:34:43,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:34:43,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:34:43,235 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:34:43,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:34:43,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:34:43,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:34:43,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:34:43,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:34:43,237 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:34:43,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:34:43,238 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:34:43,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:34:43,239 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:34:43,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:34:43,239 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:34:43,239 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:34:43,239 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:34:43,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:34:43,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:34:43,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:34:43,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:34:43,241 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:34:43,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:34:43,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:34:43,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:34:43,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:34:43,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:34:43,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:34:43,243 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:34:43,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:34:43,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:34:43,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:34:43,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:34:43,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:34:43,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:34:43,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:34:43,246 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:34:43,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:34:43,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:34:43,247 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:34:43,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:34:43,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:34:43,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:34:43,247 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_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a [2022-11-16 19:34:43,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:34:43,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:34:43,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:34:43,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:34:43,595 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:34:43,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2022-11-16 19:34:43,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/data/71164bf3a/585b681cf5a34138ab29b8d50ce6b6ae/FLAG3061f1f6a [2022-11-16 19:34:44,254 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:34:44,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2022-11-16 19:34:44,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/data/71164bf3a/585b681cf5a34138ab29b8d50ce6b6ae/FLAG3061f1f6a [2022-11-16 19:34:44,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/data/71164bf3a/585b681cf5a34138ab29b8d50ce6b6ae [2022-11-16 19:34:44,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:34:44,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:34:44,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:44,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:34:44,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:34:44,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:44" (1/1) ... [2022-11-16 19:34:44,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c292959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:44, skipping insertion in model container [2022-11-16 19:34:44,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:44" (1/1) ... [2022-11-16 19:34:44,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:34:44,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:34:44,837 WARN L229 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_2f41cfe1-3040-49ae-a2c9-280096c8fd49/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2022-11-16 19:34:45,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:45,073 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:34:45,091 WARN L229 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_2f41cfe1-3040-49ae-a2c9-280096c8fd49/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c[4289,4302] [2022-11-16 19:34:45,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:45,265 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:34:45,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45 WrapperNode [2022-11-16 19:34:45,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:45,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:45,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:34:45,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:34:45,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,371 INFO L138 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 37, calls inlined = 30, statements flattened = 580 [2022-11-16 19:34:45,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:45,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:34:45,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:34:45,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:34:45,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,420 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:34:45,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:34:45,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:34:45,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:34:45,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (1/1) ... [2022-11-16 19:34:45,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:34:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:45,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:34:45,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:34:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-16 19:34:45,538 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-16 19:34:45,538 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-16 19:34:45,539 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-16 19:34:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-16 19:34:45,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-16 19:34:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-16 19:34:45,539 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-16 19:34:45,539 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-16 19:34:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:34:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-16 19:34:45,540 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-16 19:34:45,540 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-16 19:34:45,540 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-16 19:34:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-16 19:34:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-16 19:34:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:34:45,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:34:45,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:34:45,770 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:34:45,788 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:34:46,308 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:34:46,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:34:46,449 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 19:34:46,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:46 BoogieIcfgContainer [2022-11-16 19:34:46,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:34:46,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:34:46,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:34:46,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:34:46,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:34:44" (1/3) ... [2022-11-16 19:34:46,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c23b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:46, skipping insertion in model container [2022-11-16 19:34:46,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:45" (2/3) ... [2022-11-16 19:34:46,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c23b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:46, skipping insertion in model container [2022-11-16 19:34:46,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:46" (3/3) ... [2022-11-16 19:34:46,460 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2022-11-16 19:34:46,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:34:46,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:34:46,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:34:46,536 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;@77cf2298, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:34:46,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:34:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 19:34:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:34:46,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:46,551 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:34:46,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -418419106, now seen corresponding path program 1 times [2022-11-16 19:34:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993378377] [2022-11-16 19:34:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:46,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:46,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993378377] [2022-11-16 19:34:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993378377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:46,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:46,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:34:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802394533] [2022-11-16 19:34:46,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 19:34:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 19:34:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 19:34:46,968 INFO L87 Difference]: Start difference. First operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 56 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:34:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:47,043 INFO L93 Difference]: Finished difference Result 120 states and 164 transitions. [2022-11-16 19:34:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 19:34:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2022-11-16 19:34:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:47,080 INFO L225 Difference]: With dead ends: 120 [2022-11-16 19:34:47,080 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 19:34:47,087 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 [2022-11-16 19:34:47,090 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:47,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:34:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 19:34:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-16 19:34:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 53 states have internal predecessors, (77), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:34:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2022-11-16 19:34:47,156 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 46 [2022-11-16 19:34:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:47,160 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2022-11-16 19:34:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:34:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2022-11-16 19:34:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 19:34:47,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:47,168 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:34:47,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:34:47,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1260835874, now seen corresponding path program 1 times [2022-11-16 19:34:47,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:47,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643432412] [2022-11-16 19:34:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:47,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:47,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:47,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643432412] [2022-11-16 19:34:47,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643432412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:47,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:47,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:34:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617558822] [2022-11-16 19:34:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:47,442 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:34:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:47,541 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2022-11-16 19:34:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2022-11-16 19:34:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:47,549 INFO L225 Difference]: With dead ends: 116 [2022-11-16 19:34:47,549 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 19:34:47,551 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 [2022-11-16 19:34:47,555 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:47,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 19:34:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-16 19:34:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.462962962962963) internal successors, (79), 55 states have internal predecessors, (79), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:34:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-11-16 19:34:47,577 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 47 [2022-11-16 19:34:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:47,578 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-11-16 19:34:47,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:34:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-11-16 19:34:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 19:34:47,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:47,583 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:34:47,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:34:47,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1043327300, now seen corresponding path program 1 times [2022-11-16 19:34:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793957377] [2022-11-16 19:34:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:47,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:47,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793957377] [2022-11-16 19:34:47,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793957377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400497554] [2022-11-16 19:34:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:47,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:47,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:34:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:34:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:48,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:48,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400497554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:48,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034093731] [2022-11-16 19:34:48,354 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-16 19:34:48,354 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:48,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:48,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:48,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:57,351 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-16 19:34:57,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:35:23,455 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 564 DAG size of output: 309 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:35:30,593 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 566 DAG size of output: 312 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:35:31,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2034093731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:31,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:35:31,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2022-11-16 19:35:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714942760] [2022-11-16 19:35:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:35:31,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:35:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:35:31,924 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:35:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:34,835 INFO L93 Difference]: Finished difference Result 214 states and 341 transitions. [2022-11-16 19:35:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:35:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2022-11-16 19:35:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:34,842 INFO L225 Difference]: With dead ends: 214 [2022-11-16 19:35:34,843 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 19:35:34,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:35:34,845 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 101 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 994 Invalid, 668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 19:35:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 19:35:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2022-11-16 19:35:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.48) internal successors, (111), 76 states have internal predecessors, (111), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:35:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2022-11-16 19:35:34,898 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 51 [2022-11-16 19:35:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:34,898 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2022-11-16 19:35:34,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:35:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2022-11-16 19:35:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 19:35:34,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:34,900 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:35:34,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:35:35,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:35,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -832994549, now seen corresponding path program 1 times [2022-11-16 19:35:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843583679] [2022-11-16 19:35:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:35:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:35:35,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:35,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843583679] [2022-11-16 19:35:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843583679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:35,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:35,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:35:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566927663] [2022-11-16 19:35:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:35:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:35:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:35,212 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:35:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:35,354 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2022-11-16 19:35:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:35:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-11-16 19:35:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:35,357 INFO L225 Difference]: With dead ends: 230 [2022-11-16 19:35:35,357 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 19:35:35,358 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 [2022-11-16 19:35:35,359 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:35,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 170 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:35:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 19:35:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-11-16 19:35:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.55) internal successors, (186), 121 states have internal predecessors, (186), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:35:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 213 transitions. [2022-11-16 19:35:35,455 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 213 transitions. Word has length 52 [2022-11-16 19:35:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:35,456 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 213 transitions. [2022-11-16 19:35:35,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 19:35:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 213 transitions. [2022-11-16 19:35:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 19:35:35,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:35,463 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:35:35,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:35:35,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 71777151, now seen corresponding path program 1 times [2022-11-16 19:35:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146898700] [2022-11-16 19:35:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:35,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:35:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:35:35,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146898700] [2022-11-16 19:35:35,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146898700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:35:35,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970537169] [2022-11-16 19:35:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:35,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:35,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:35,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:35:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:35:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:35:35,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:35:35,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970537169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:35,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360714058] [2022-11-16 19:35:35,921 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-16 19:35:35,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:35:35,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:35:35,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:35:35,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:35:44,701 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-16 19:35:45,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:36:11,301 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 566 DAG size of output: 327 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:18,336 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 568 DAG size of output: 313 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:25,849 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 568 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:33,340 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 566 DAG size of output: 323 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [360714058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:36:34,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:36:34,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 21 [2022-11-16 19:36:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861649101] [2022-11-16 19:36:34,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:36:34,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:36:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:36:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:36:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:36:34,668 INFO L87 Difference]: Start difference. First operand 142 states and 213 transitions. Second operand has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:36:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:37,601 INFO L93 Difference]: Finished difference Result 344 states and 561 transitions. [2022-11-16 19:36:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:36:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2022-11-16 19:36:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:37,604 INFO L225 Difference]: With dead ends: 344 [2022-11-16 19:36:37,604 INFO L226 Difference]: Without dead ends: 257 [2022-11-16 19:36:37,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:36:37,605 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 161 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:37,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 838 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 19:36:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-16 19:36:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 150. [2022-11-16 19:36:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 128 states have (on average 1.546875) internal successors, (198), 129 states have internal predecessors, (198), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:36:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 225 transitions. [2022-11-16 19:36:37,747 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 225 transitions. Word has length 53 [2022-11-16 19:36:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:37,748 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 225 transitions. [2022-11-16 19:36:37,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:36:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 225 transitions. [2022-11-16 19:36:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 19:36:37,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:37,751 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:36:37,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:37,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:37,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1366890874, now seen corresponding path program 1 times [2022-11-16 19:36:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:36:37,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906203728] [2022-11-16 19:36:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:37,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:36:38,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:36:38,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906203728] [2022-11-16 19:36:38,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906203728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:36:38,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168087919] [2022-11-16 19:36:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:38,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:38,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:38,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:38,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:36:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:36:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:36:38,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:36:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168087919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:38,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646979705] [2022-11-16 19:36:38,392 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2022-11-16 19:36:38,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:36:38,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:36:38,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:36:38,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:36:48,189 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 452 for LOIs [2022-11-16 19:36:48,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:36:59,816 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 452 DAG size of output: 257 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:05,500 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 475 DAG size of output: 277 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:20,006 WARN L233 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 568 DAG size of output: 403 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:30,413 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 570 DAG size of output: 422 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:38,504 WARN L233 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 570 DAG size of output: 339 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:46,556 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 568 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:53,522 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 568 DAG size of output: 319 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:38:00,474 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 566 DAG size of output: 317 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:38:01,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [646979705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:01,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:38:01,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [4, 4, 4] total 23 [2022-11-16 19:38:01,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916772362] [2022-11-16 19:38:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:38:01,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:38:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:38:01,846 INFO L87 Difference]: Start difference. First operand 150 states and 225 transitions. Second operand has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:38:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:05,191 INFO L93 Difference]: Finished difference Result 348 states and 566 transitions. [2022-11-16 19:38:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:38:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2022-11-16 19:38:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:05,194 INFO L225 Difference]: With dead ends: 348 [2022-11-16 19:38:05,194 INFO L226 Difference]: Without dead ends: 261 [2022-11-16 19:38:05,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 73.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:38:05,195 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 115 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:05,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 772 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 19:38:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-16 19:38:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 160. [2022-11-16 19:38:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 139 states have internal predecessors, (213), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 19:38:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 240 transitions. [2022-11-16 19:38:05,327 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 240 transitions. Word has length 55 [2022-11-16 19:38:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:05,327 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 240 transitions. [2022-11-16 19:38:05,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 19:38:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 240 transitions. [2022-11-16 19:38:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 19:38:05,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:05,330 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:38:05,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:05,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:38:05,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1757041449, now seen corresponding path program 1 times [2022-11-16 19:38:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:05,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645146748] [2022-11-16 19:38:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:38:05,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645146748] [2022-11-16 19:38:05,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645146748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:05,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142276172] [2022-11-16 19:38:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:05,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:05,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:38:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:05,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:38:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:38:05,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:38:06,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142276172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:38:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782799822] [2022-11-16 19:38:06,063 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-16 19:38:06,063 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:38:06,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:38:06,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:38:06,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:38:17,383 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-16 19:38:17,692 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 246 for LOIs [2022-11-16 19:38:19,541 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 248 for LOIs [2022-11-16 19:38:21,968 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 239 for LOIs [2022-11-16 19:38:22,004 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 481 for LOIs [2022-11-16 19:38:25,795 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 236 for LOIs [2022-11-16 19:38:25,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:38:57,974 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 481 DAG size of output: 248 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:26,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [782799822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:39:26,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:39:26,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [6, 5, 5] total 42 [2022-11-16 19:39:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358264457] [2022-11-16 19:39:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:39:26,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 19:39:26,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:39:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 19:39:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 19:39:26,778 INFO L87 Difference]: Start difference. First operand 160 states and 240 transitions. Second operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-16 19:39:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:36,830 INFO L93 Difference]: Finished difference Result 420 states and 673 transitions. [2022-11-16 19:39:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 19:39:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2022-11-16 19:39:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:36,833 INFO L225 Difference]: With dead ends: 420 [2022-11-16 19:39:36,833 INFO L226 Difference]: Without dead ends: 291 [2022-11-16 19:39:36,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 19:39:36,835 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 233 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:36,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1995 Invalid, 2368 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-16 19:39:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-16 19:39:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 229. [2022-11-16 19:39:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 197 states have (on average 1.598984771573604) internal successors, (315), 199 states have internal predecessors, (315), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 19:39:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 354 transitions. [2022-11-16 19:39:37,095 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 354 transitions. Word has length 56 [2022-11-16 19:39:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:37,096 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 354 transitions. [2022-11-16 19:39:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-16 19:39:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 354 transitions. [2022-11-16 19:39:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 19:39:37,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:37,098 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:39:37,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:37,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:39:37,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:39:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 48270293, now seen corresponding path program 1 times [2022-11-16 19:39:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:39:37,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570834213] [2022-11-16 19:39:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:39:37,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:39:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:39:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:39:37,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:39:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570834213] [2022-11-16 19:39:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570834213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:39:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452273532] [2022-11-16 19:39:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:39:37,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:39:37,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:39:37,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:39:37,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:39:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:39:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:39:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:39:37,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:39:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:39:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452273532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:39:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786651917] [2022-11-16 19:39:37,774 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-16 19:39:37,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:39:37,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:39:37,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:39:37,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:40:06,768 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-16 19:40:07,183 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 248 for LOIs [2022-11-16 19:40:08,739 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 248 for LOIs [2022-11-16 19:40:19,844 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 242 for LOIs [2022-11-16 19:40:19,874 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2022-11-16 19:40:19,911 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 477 for LOIs [2022-11-16 19:40:21,842 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 452 for LOIs [2022-11-16 19:40:22,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:40:54,907 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 563 DAG size of output: 322 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:00,354 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 561 DAG size of output: 320 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:15,772 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 559 DAG size of output: 339 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:21,864 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 557 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:38,596 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 555 DAG size of output: 385 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:46,268 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 553 DAG size of output: 383 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:42:00,585 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 477 DAG size of output: 250 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:42:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [786651917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:54,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:42:54,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 54 [2022-11-16 19:42:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515041106] [2022-11-16 19:42:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:54,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:42:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:42:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2645, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 19:42:54,203 INFO L87 Difference]: Start difference. First operand 229 states and 354 transitions. Second operand has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:43:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:44,020 INFO L93 Difference]: Finished difference Result 406 states and 632 transitions. [2022-11-16 19:43:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 19:43:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 61 [2022-11-16 19:43:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:44,024 INFO L225 Difference]: With dead ends: 406 [2022-11-16 19:43:44,024 INFO L226 Difference]: Without dead ends: 319 [2022-11-16 19:43:44,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 192.3s TimeCoverageRelationStatistics Valid=440, Invalid=4116, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 19:43:44,026 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 320 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:44,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1212 Invalid, 2488 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-16 19:43:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-16 19:43:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 288. [2022-11-16 19:43:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 243 states have (on average 1.559670781893004) internal successors, (379), 246 states have internal predecessors, (379), 28 states have call successors, (28), 18 states have call predecessors, (28), 16 states have return successors, (28), 23 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-16 19:43:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 435 transitions. [2022-11-16 19:43:44,290 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 435 transitions. Word has length 61 [2022-11-16 19:43:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:44,290 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 435 transitions. [2022-11-16 19:43:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 32 states have internal predecessors, (36), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 19:43:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 435 transitions. [2022-11-16 19:43:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 19:43:44,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:44,292 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:43:44,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:44,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -541173377, now seen corresponding path program 1 times [2022-11-16 19:43:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818050700] [2022-11-16 19:43:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:44,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:43:44,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:44,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818050700] [2022-11-16 19:43:44,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818050700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506483393] [2022-11-16 19:43:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:44,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:44,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f41cfe1-3040-49ae-a2c9-280096c8fd49/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:43:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:43:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:43:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:43:45,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506483393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:45,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600310980] [2022-11-16 19:43:45,044 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-16 19:43:45,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:45,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:45,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:45,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:11,199 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 451 for LOIs [2022-11-16 19:44:11,501 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 464 for LOIs [2022-11-16 19:44:36,291 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 462 for LOIs [2022-11-16 19:44:50,570 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 242 for LOIs [2022-11-16 19:44:50,600 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 241 for LOIs [2022-11-16 19:44:50,637 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 455 for LOIs [2022-11-16 19:44:51,398 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 445 for LOIs [2022-11-16 19:44:52,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:16,603 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 551 DAG size of output: 352 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:23,487 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 553 DAG size of output: 354 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:31,630 WARN L233 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 555 DAG size of output: 356 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:39,383 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 557 DAG size of output: 379 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:47,108 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 555 DAG size of output: 377 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:46:16,700 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 557 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:46:25,880 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 555 DAG size of output: 419 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:46:35,170 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 559 DAG size of output: 423 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:46:42,112 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 552 DAG size of output: 353 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:47:04,612 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 506 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:47:19,708 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 502 DAG size of output: 283 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:47:29,859 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 462 DAG size of output: 304 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:47:35,927 WARN L233 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 501 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:48:10,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [600310980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:10,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:48:10,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [6, 5, 5] total 57 [2022-11-16 19:48:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604526211] [2022-11-16 19:48:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:48:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:10,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:48:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2970, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 19:48:10,913 INFO L87 Difference]: Start difference. First operand 288 states and 435 transitions. Second operand has 49 states, 34 states have (on average 1.088235294117647) internal successors, (37), 32 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)