./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta --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 14dde7567748bafe076b052fc50547f9c42c454af1c5c326a7b2a07549e9af32 --- 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-dbf71c6-m [2022-10-17 17:39:11,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:11,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:11,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:11,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:11,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:11,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:11,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:11,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:11,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:11,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:11,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:11,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:11,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:11,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:11,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:11,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:11,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:11,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:11,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:11,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:11,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:11,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:11,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:11,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:11,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:11,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:11,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:11,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:11,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:11,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:11,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:11,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:11,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:11,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:11,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:11,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:11,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:11,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:11,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:11,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:11,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:11,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:11,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:11,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:11,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:11,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:11,807 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:11,807 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:11,807 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:11,808 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:11,808 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:11,808 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:11,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:11,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:11,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:11,809 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:11,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:11,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:11,810 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:11,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:11,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:11,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:11,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:11,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:11,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:11,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:11,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:11,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:11,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:11,814 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:11,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:11,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:11,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:11,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:11,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:11,816 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:11,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:11,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:11,817 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:11,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:11,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:11,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:11,818 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_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14dde7567748bafe076b052fc50547f9c42c454af1c5c326a7b2a07549e9af32 [2022-10-17 17:39:12,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:12,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:12,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:12,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:12,239 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:12,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/email_spec6_product16.cil.c [2022-10-17 17:39:12,317 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/data/a103c7588/cd9f0218205c45c58b1239b4cd0086be/FLAGb8ae0f5db [2022-10-17 17:39:13,013 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:13,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c [2022-10-17 17:39:13,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/data/a103c7588/cd9f0218205c45c58b1239b4cd0086be/FLAGb8ae0f5db [2022-10-17 17:39:13,198 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/data/a103c7588/cd9f0218205c45c58b1239b4cd0086be [2022-10-17 17:39:13,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:13,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:13,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:13,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:13,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:13,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:13" (1/1) ... [2022-10-17 17:39:13,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276ac4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:13, skipping insertion in model container [2022-10-17 17:39:13,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:13" (1/1) ... [2022-10-17 17:39:13,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:13,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:13,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c[39829,39842] [2022-10-17 17:39:14,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:14,037 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:14,143 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/sv-benchmarks/c/product-lines/email_spec6_product16.cil.c[39829,39842] [2022-10-17 17:39:14,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:14,225 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:14,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14 WrapperNode [2022-10-17 17:39:14,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:14,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:14,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:14,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:14,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,333 INFO L138 Inliner]: procedures = 126, calls = 203, calls flagged for inlining = 55, calls inlined = 50, statements flattened = 969 [2022-10-17 17:39:14,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:14,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:14,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:14,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:14,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:14,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:14,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:14,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:14,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (1/1) ... [2022-10-17 17:39:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:14,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:14,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:14,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:14,584 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-10-17 17:39:14,584 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-10-17 17:39:14,584 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-10-17 17:39:14,585 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-10-17 17:39:14,585 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-10-17 17:39:14,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-10-17 17:39:14,585 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-10-17 17:39:14,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-10-17 17:39:14,586 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-10-17 17:39:14,586 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-10-17 17:39:14,586 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-10-17 17:39:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-10-17 17:39:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-10-17 17:39:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-10-17 17:39:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-10-17 17:39:14,587 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-10-17 17:39:14,587 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-10-17 17:39:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-10-17 17:39:14,588 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-10-17 17:39:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-10-17 17:39:14,588 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-10-17 17:39:14,588 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-10-17 17:39:14,589 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-10-17 17:39:14,589 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-10-17 17:39:14,589 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-10-17 17:39:14,589 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-10-17 17:39:14,590 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-10-17 17:39:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-10-17 17:39:14,590 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-10-17 17:39:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-10-17 17:39:14,590 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-10-17 17:39:14,590 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-10-17 17:39:14,591 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-10-17 17:39:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-10-17 17:39:14,591 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-10-17 17:39:14,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-10-17 17:39:14,592 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-10-17 17:39:14,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:14,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:14,866 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:14,883 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:15,970 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:16,483 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:16,484 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:39:16,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:16 BoogieIcfgContainer [2022-10-17 17:39:16,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:16,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:16,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:16,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:16,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:13" (1/3) ... [2022-10-17 17:39:16,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b556d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:16, skipping insertion in model container [2022-10-17 17:39:16,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:14" (2/3) ... [2022-10-17 17:39:16,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b556d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:16, skipping insertion in model container [2022-10-17 17:39:16,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:16" (3/3) ... [2022-10-17 17:39:16,498 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec6_product16.cil.c [2022-10-17 17:39:16,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:16,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:39:16,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:16,592 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;@48c9afbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:16,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:39:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 98 states have (on average 1.346938775510204) internal successors, (132), 102 states have internal predecessors, (132), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-10-17 17:39:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-17 17:39:16,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:16,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:16,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1201488115, now seen corresponding path program 1 times [2022-10-17 17:39:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047982881] [2022-10-17 17:39:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:17,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:17,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047982881] [2022-10-17 17:39:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047982881] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:17,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:17,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:39:17,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844429123] [2022-10-17 17:39:17,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:39:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:39:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:39:17,143 INFO L87 Difference]: Start difference. First operand has 167 states, 98 states have (on average 1.346938775510204) internal successors, (132), 102 states have internal predecessors, (132), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:17,277 INFO L93 Difference]: Finished difference Result 251 states and 338 transitions. [2022-10-17 17:39:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:39:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 72 [2022-10-17 17:39:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:17,299 INFO L225 Difference]: With dead ends: 251 [2022-10-17 17:39:17,300 INFO L226 Difference]: Without dead ends: 164 [2022-10-17 17:39:17,306 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 [2022-10-17 17:39:17,310 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:17,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 196 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-10-17 17:39:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-10-17 17:39:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 96 states have (on average 1.3125) internal successors, (126), 99 states have internal predecessors, (126), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-10-17 17:39:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 223 transitions. [2022-10-17 17:39:17,407 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 223 transitions. Word has length 72 [2022-10-17 17:39:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:17,409 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 223 transitions. [2022-10-17 17:39:17,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 223 transitions. [2022-10-17 17:39:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:39:17,416 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:17,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:17,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:17,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -711036879, now seen corresponding path program 1 times [2022-10-17 17:39:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:17,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741914355] [2022-10-17 17:39:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:17,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741914355] [2022-10-17 17:39:17,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741914355] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:17,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:17,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:39:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020146763] [2022-10-17 17:39:17,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:17,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:17,751 INFO L87 Difference]: Start difference. First operand 164 states and 223 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:17,904 INFO L93 Difference]: Finished difference Result 247 states and 326 transitions. [2022-10-17 17:39:17,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 73 [2022-10-17 17:39:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:17,908 INFO L225 Difference]: With dead ends: 247 [2022-10-17 17:39:17,908 INFO L226 Difference]: Without dead ends: 166 [2022-10-17 17:39:17,910 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 [2022-10-17 17:39:17,911 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 0 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:17,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-10-17 17:39:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-10-17 17:39:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 101 states have internal predecessors, (128), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-10-17 17:39:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2022-10-17 17:39:17,935 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 73 [2022-10-17 17:39:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:17,938 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2022-10-17 17:39:17,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2022-10-17 17:39:17,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:39:17,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:17,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:17,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:39:17,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash -944095922, now seen corresponding path program 1 times [2022-10-17 17:39:17,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:17,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449090391] [2022-10-17 17:39:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:18,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:18,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449090391] [2022-10-17 17:39:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449090391] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:18,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:39:18,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634677182] [2022-10-17 17:39:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:18,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:18,153 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:18,327 INFO L93 Difference]: Finished difference Result 362 states and 509 transitions. [2022-10-17 17:39:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 78 [2022-10-17 17:39:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:18,369 INFO L225 Difference]: With dead ends: 362 [2022-10-17 17:39:18,369 INFO L226 Difference]: Without dead ends: 214 [2022-10-17 17:39:18,371 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 [2022-10-17 17:39:18,372 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 57 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:18,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 393 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-10-17 17:39:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2022-10-17 17:39:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 130 states have (on average 1.3923076923076922) internal successors, (181), 133 states have internal predecessors, (181), 60 states have call successors, (60), 18 states have call predecessors, (60), 18 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-10-17 17:39:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 300 transitions. [2022-10-17 17:39:18,424 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 300 transitions. Word has length 78 [2022-10-17 17:39:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:18,426 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 300 transitions. [2022-10-17 17:39:18,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:39:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 300 transitions. [2022-10-17 17:39:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-10-17 17:39:18,435 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:18,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:18,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:39:18,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash -840321852, now seen corresponding path program 1 times [2022-10-17 17:39:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390474018] [2022-10-17 17:39:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:18,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390474018] [2022-10-17 17:39:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390474018] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:18,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13861734] [2022-10-17 17:39:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:18,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:18,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:18,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9062dfd2-1642-4ebe-a0d3-e85396b202e2/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:39:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:39:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:19,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:39:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13861734] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825225739] [2022-10-17 17:39:19,242 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-10-17 17:39:19,243 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:19,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:19,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:19,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs