./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7 --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 eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:49:57,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:49:57,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:49:57,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:49:57,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:49:57,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:49:57,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:49:57,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:49:57,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:49:57,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:49:57,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:49:57,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:49:57,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:49:57,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:49:57,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:49:57,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:49:57,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:49:57,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:49:57,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:49:57,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:49:57,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:49:57,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:49:57,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:49:57,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:49:57,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:49:57,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:49:57,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:49:57,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:49:57,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:49:57,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:49:57,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:49:57,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:49:57,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:49:57,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:49:57,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:49:57,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:49:57,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:49:57,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:49:57,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:49:57,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:49:57,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:49:57,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:49:57,259 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:49:57,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:49:57,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:49:57,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:49:57,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:49:57,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:49:57,262 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:49:57,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:49:57,262 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:49:57,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:49:57,263 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:49:57,264 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:49:57,264 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:49:57,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:49:57,264 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:49:57,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:49:57,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:49:57,265 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:49:57,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:49:57,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:49:57,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:49:57,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:49:57,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:49:57,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:49:57,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:49:57,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:49:57,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:49:57,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:49:57,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:49:57,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:49:57,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:49:57,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:49:57,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:49:57,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:49:57,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:49:57,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:49:57,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:49:57,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:49:57,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:49:57,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:49:57,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:49:57,273 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 [2021-11-25 17:49:57,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:49:57,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:49:57,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:49:57,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:49:57,563 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:49:57,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2021-11-25 17:49:57,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/data/5439f8b80/701b7e18d24e4072bc0bc9f307522775/FLAGdd0a48e00 [2021-11-25 17:49:58,620 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:49:58,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2021-11-25 17:49:58,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/data/5439f8b80/701b7e18d24e4072bc0bc9f307522775/FLAGdd0a48e00 [2021-11-25 17:49:58,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/data/5439f8b80/701b7e18d24e4072bc0bc9f307522775 [2021-11-25 17:49:58,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:49:58,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:49:58,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:49:58,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:49:58,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:49:58,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:58" (1/1) ... [2021-11-25 17:49:58,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f582b82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:49:58, skipping insertion in model container [2021-11-25 17:49:58,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:49:58" (1/1) ... [2021-11-25 17:49:58,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:49:59,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:50:01,551 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_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2021-11-25 17:50:01,582 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_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2021-11-25 17:50:01,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:50:01,974 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:50:03,303 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_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2021-11-25 17:50:03,310 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_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2021-11-25 17:50:03,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:50:03,468 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:50:03,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03 WrapperNode [2021-11-25 17:50:03,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:50:03,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:50:03,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:50:03,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:50:03,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:03,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,120 INFO L137 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13260 [2021-11-25 17:50:04,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:50:04,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:50:04,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:50:04,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:50:04,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:50:04,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:50:04,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:50:04,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:50:04,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (1/1) ... [2021-11-25 17:50:04,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:50:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:04,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:50:04,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:50:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:50:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 17:50:04,795 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 17:50:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 17:50:04,795 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 17:50:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 17:50:04,795 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 17:50:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-25 17:50:04,796 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-25 17:50:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 17:50:04,796 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 17:50:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 17:50:04,796 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 17:50:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 17:50:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 17:50:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:50:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:50:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:50:05,013 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:50:05,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:50:12,503 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:50:15,439 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:50:15,439 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-25 17:50:15,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:15 BoogieIcfgContainer [2021-11-25 17:50:15,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:50:15,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:50:15,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:50:15,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:50:15,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:49:58" (1/3) ... [2021-11-25 17:50:15,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a65ecc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:15, skipping insertion in model container [2021-11-25 17:50:15,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:50:03" (2/3) ... [2021-11-25 17:50:15,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a65ecc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:50:15, skipping insertion in model container [2021-11-25 17:50:15,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:50:15" (3/3) ... [2021-11-25 17:50:15,457 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.15.cil.c [2021-11-25 17:50:15,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:50:15,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 17:50:15,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:50:15,539 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:50:15,540 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 17:50:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 17:50:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 17:50:15,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:15,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:15,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash -26028369, now seen corresponding path program 1 times [2021-11-25 17:50:15,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708350942] [2021-11-25 17:50:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:15,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:50:16,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708350942] [2021-11-25 17:50:16,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708350942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:16,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:16,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:50:16,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190167935] [2021-11-25 17:50:16,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:16,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:50:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:50:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:50:16,183 INFO L87 Difference]: Start difference. First operand has 1848 states, 1809 states have (on average 1.9541182974018796) internal successors, (3535), 1814 states have internal predecessors, (3535), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:50:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:17,320 INFO L93 Difference]: Finished difference Result 3877 states and 7503 transitions. [2021-11-25 17:50:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:50:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-11-25 17:50:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:17,347 INFO L225 Difference]: With dead ends: 3877 [2021-11-25 17:50:17,347 INFO L226 Difference]: Without dead ends: 2028 [2021-11-25 17:50:17,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:50:17,359 INFO L933 BasicCegarLoop]: 3549 mSDtfsCounter, 3820 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3820 SdHoareTripleChecker+Valid, 6994 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:17,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3820 Valid, 6994 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:50:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-11-25 17:50:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2027. [2021-11-25 17:50:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1961 states have (on average 1.9163691993880674) internal successors, (3758), 1965 states have internal predecessors, (3758), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-25 17:50:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3860 transitions. [2021-11-25 17:50:17,499 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3860 transitions. Word has length 71 [2021-11-25 17:50:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:17,500 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 3860 transitions. [2021-11-25 17:50:17,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:50:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3860 transitions. [2021-11-25 17:50:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:17,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:17,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:17,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:50:17,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 183933015, now seen corresponding path program 1 times [2021-11-25 17:50:17,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482794763] [2021-11-25 17:50:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:17,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:17,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:17,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482794763] [2021-11-25 17:50:17,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482794763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:17,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382917871] [2021-11-25 17:50:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:17,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:17,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:17,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:17,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:50:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 17:50:18,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:18,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382917871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:18,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:18,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:18,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717988849] [2021-11-25 17:50:18,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:18,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:18,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:18,302 INFO L87 Difference]: Start difference. First operand 2027 states and 3860 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:18,796 INFO L93 Difference]: Finished difference Result 2782 states and 5049 transitions. [2021-11-25 17:50:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:18,817 INFO L225 Difference]: With dead ends: 2782 [2021-11-25 17:50:18,817 INFO L226 Difference]: Without dead ends: 2401 [2021-11-25 17:50:18,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:18,821 INFO L933 BasicCegarLoop]: 3376 mSDtfsCounter, 3533 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:18,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3533 Valid, 3624 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-11-25 17:50:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2395. [2021-11-25 17:50:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2273 states have (on average 1.86229652441707) internal successors, (4233), 2278 states have internal predecessors, (4233), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-25 17:50:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4423 transitions. [2021-11-25 17:50:18,912 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4423 transitions. Word has length 144 [2021-11-25 17:50:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:18,913 INFO L470 AbstractCegarLoop]: Abstraction has 2395 states and 4423 transitions. [2021-11-25 17:50:18,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4423 transitions. [2021-11-25 17:50:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:18,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:18,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:18,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:50:19,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:19,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -802749291, now seen corresponding path program 1 times [2021-11-25 17:50:19,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:19,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187987372] [2021-11-25 17:50:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:19,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:19,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187987372] [2021-11-25 17:50:19,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187987372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695004165] [2021-11-25 17:50:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:19,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:19,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:50:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:19,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 17:50:19,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:19,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695004165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:19,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:19,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:19,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735632643] [2021-11-25 17:50:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:19,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:19,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:19,889 INFO L87 Difference]: Start difference. First operand 2395 states and 4423 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:20,455 INFO L93 Difference]: Finished difference Result 3880 states and 6758 transitions. [2021-11-25 17:50:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:20,477 INFO L225 Difference]: With dead ends: 3880 [2021-11-25 17:50:20,478 INFO L226 Difference]: Without dead ends: 3131 [2021-11-25 17:50:20,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:20,483 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3527 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:20,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3527 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:50:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-25 17:50:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3123. [2021-11-25 17:50:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 2891 states have (on average 1.7886544448287789) internal successors, (5171), 2898 states have internal predecessors, (5171), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2021-11-25 17:50:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5533 transitions. [2021-11-25 17:50:20,619 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5533 transitions. Word has length 144 [2021-11-25 17:50:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:20,620 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5533 transitions. [2021-11-25 17:50:20,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5533 transitions. [2021-11-25 17:50:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:20,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:20,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:20,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:20,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:20,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1405814957, now seen corresponding path program 1 times [2021-11-25 17:50:20,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:20,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643786982] [2021-11-25 17:50:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:20,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:20,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643786982] [2021-11-25 17:50:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643786982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111519023] [2021-11-25 17:50:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:20,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:20,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:20,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:50:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-25 17:50:21,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:21,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111519023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:21,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:21,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:21,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494248475] [2021-11-25 17:50:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:21,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:21,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:21,458 INFO L87 Difference]: Start difference. First operand 3123 states and 5533 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:22,052 INFO L93 Difference]: Finished difference Result 6052 states and 10126 transitions. [2021-11-25 17:50:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:22,088 INFO L225 Difference]: With dead ends: 6052 [2021-11-25 17:50:22,088 INFO L226 Difference]: Without dead ends: 4575 [2021-11-25 17:50:22,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:22,100 INFO L933 BasicCegarLoop]: 3374 mSDtfsCounter, 3551 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3622 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:22,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3551 Valid, 3622 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2021-11-25 17:50:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4563. [2021-11-25 17:50:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4115 states have (on average 1.7066828675577157) internal successors, (7023), 4126 states have internal predecessors, (7023), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2021-11-25 17:50:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 7721 transitions. [2021-11-25 17:50:22,386 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 7721 transitions. Word has length 144 [2021-11-25 17:50:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:22,386 INFO L470 AbstractCegarLoop]: Abstraction has 4563 states and 7721 transitions. [2021-11-25 17:50:22,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 7721 transitions. [2021-11-25 17:50:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:22,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:22,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:22,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:22,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:22,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 904269841, now seen corresponding path program 1 times [2021-11-25 17:50:22,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421253387] [2021-11-25 17:50:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:22,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:22,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:22,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421253387] [2021-11-25 17:50:22,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421253387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:22,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836775135] [2021-11-25 17:50:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:22,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:22,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:22,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:22,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:50:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 17:50:23,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:23,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836775135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:23,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:23,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:23,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884184960] [2021-11-25 17:50:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:23,248 INFO L87 Difference]: Start difference. First operand 4563 states and 7721 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:23,967 INFO L93 Difference]: Finished difference Result 10348 states and 16762 transitions. [2021-11-25 17:50:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:23,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:24,023 INFO L225 Difference]: With dead ends: 10348 [2021-11-25 17:50:24,024 INFO L226 Difference]: Without dead ends: 7431 [2021-11-25 17:50:24,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:24,041 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3545 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:24,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3545 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-11-25 17:50:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7411. [2021-11-25 17:50:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 6539 states have (on average 1.6331243309374521) internal successors, (10679), 6558 states have internal predecessors, (10679), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2021-11-25 17:50:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 12033 transitions. [2021-11-25 17:50:24,513 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 12033 transitions. Word has length 144 [2021-11-25 17:50:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:24,514 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 12033 transitions. [2021-11-25 17:50:24,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 12033 transitions. [2021-11-25 17:50:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:24,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:24,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:24,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:24,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:24,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:24,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1114632369, now seen corresponding path program 1 times [2021-11-25 17:50:24,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:24,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018778122] [2021-11-25 17:50:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:24,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:24,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018778122] [2021-11-25 17:50:24,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018778122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538195071] [2021-11-25 17:50:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:24,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:24,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:24,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:24,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:50:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-25 17:50:25,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:25,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538195071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:25,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:25,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:25,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769348053] [2021-11-25 17:50:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:25,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:25,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:25,472 INFO L87 Difference]: Start difference. First operand 7411 states and 12033 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:26,302 INFO L93 Difference]: Finished difference Result 18844 states and 29834 transitions. [2021-11-25 17:50:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:26,397 INFO L225 Difference]: With dead ends: 18844 [2021-11-25 17:50:26,397 INFO L226 Difference]: Without dead ends: 13079 [2021-11-25 17:50:26,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:26,432 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3554 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3554 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:26,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3554 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13079 states. [2021-11-25 17:50:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13079 to 13043. [2021-11-25 17:50:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13043 states, 11339 states have (on average 1.578181497486551) internal successors, (17895), 11374 states have internal predecessors, (17895), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2021-11-25 17:50:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13043 states to 13043 states and 20529 transitions. [2021-11-25 17:50:27,024 INFO L78 Accepts]: Start accepts. Automaton has 13043 states and 20529 transitions. Word has length 144 [2021-11-25 17:50:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:27,025 INFO L470 AbstractCegarLoop]: Abstraction has 13043 states and 20529 transitions. [2021-11-25 17:50:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13043 states and 20529 transitions. [2021-11-25 17:50:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:27,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:27,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:27,281 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash 360601041, now seen corresponding path program 1 times [2021-11-25 17:50:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237598187] [2021-11-25 17:50:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:27,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:27,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237598187] [2021-11-25 17:50:27,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237598187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983213777] [2021-11-25 17:50:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:27,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:27,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:27,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:50:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:50:27,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983213777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:27,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:27,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:27,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085654201] [2021-11-25 17:50:27,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:27,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:27,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:27,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:27,910 INFO L87 Difference]: Start difference. First operand 13043 states and 20529 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:29,220 INFO L93 Difference]: Finished difference Result 35644 states and 55578 transitions. [2021-11-25 17:50:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:29,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:29,329 INFO L225 Difference]: With dead ends: 35644 [2021-11-25 17:50:29,329 INFO L226 Difference]: Without dead ends: 24247 [2021-11-25 17:50:29,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:29,374 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3524 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:29,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3524 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24247 states. [2021-11-25 17:50:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24247 to 24179. [2021-11-25 17:50:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24179 states, 20843 states have (on average 1.5417646212157559) internal successors, (32135), 20910 states have internal predecessors, (32135), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2021-11-25 17:50:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24179 states to 24179 states and 37265 transitions. [2021-11-25 17:50:30,681 INFO L78 Accepts]: Start accepts. Automaton has 24179 states and 37265 transitions. Word has length 144 [2021-11-25 17:50:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:30,681 INFO L470 AbstractCegarLoop]: Abstraction has 24179 states and 37265 transitions. [2021-11-25 17:50:30,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 24179 states and 37265 transitions. [2021-11-25 17:50:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:30,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:30,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:30,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:30,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -375551021, now seen corresponding path program 1 times [2021-11-25 17:50:30,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116246655] [2021-11-25 17:50:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:30,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 17:50:31,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116246655] [2021-11-25 17:50:31,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116246655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805617936] [2021-11-25 17:50:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:31,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:50:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 17:50:31,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:31,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805617936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:31,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:31,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:50:31,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492772492] [2021-11-25 17:50:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:31,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:31,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:31,601 INFO L87 Difference]: Start difference. First operand 24179 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:33,688 INFO L93 Difference]: Finished difference Result 68860 states and 106266 transitions. [2021-11-25 17:50:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2021-11-25 17:50:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:33,913 INFO L225 Difference]: With dead ends: 68860 [2021-11-25 17:50:33,913 INFO L226 Difference]: Without dead ends: 46327 [2021-11-25 17:50:33,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:33,994 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3539 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:33,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3539 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:50:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46327 states. [2021-11-25 17:50:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46327 to 46195. [2021-11-25 17:50:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46195 states, 39659 states have (on average 1.5187221059532514) internal successors, (60231), 39790 states have internal predecessors, (60231), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2021-11-25 17:50:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46195 states to 46195 states and 70225 transitions. [2021-11-25 17:50:36,039 INFO L78 Accepts]: Start accepts. Automaton has 46195 states and 70225 transitions. Word has length 144 [2021-11-25 17:50:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:36,039 INFO L470 AbstractCegarLoop]: Abstraction has 46195 states and 70225 transitions. [2021-11-25 17:50:36,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 17:50:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 46195 states and 70225 transitions. [2021-11-25 17:50:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 17:50:36,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:36,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 17:50:36,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:36,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:36,387 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash -74493551, now seen corresponding path program 1 times [2021-11-25 17:50:36,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:36,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148932941] [2021-11-25 17:50:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:36,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-25 17:50:36,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:36,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148932941] [2021-11-25 17:50:36,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148932941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:36,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:50:36,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:50:36,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277672268] [2021-11-25 17:50:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:36,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:50:36,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:50:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:50:36,567 INFO L87 Difference]: Start difference. First operand 46195 states and 70225 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 17:50:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:41,125 INFO L93 Difference]: Finished difference Result 158075 states and 238040 transitions. [2021-11-25 17:50:41,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:50:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2021-11-25 17:50:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:42,337 INFO L225 Difference]: With dead ends: 158075 [2021-11-25 17:50:42,337 INFO L226 Difference]: Without dead ends: 113527 [2021-11-25 17:50:42,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:50:42,483 INFO L933 BasicCegarLoop]: 3345 mSDtfsCounter, 4425 mSDsluCounter, 10594 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4447 SdHoareTripleChecker+Valid, 13168 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:42,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4447 Valid, 13168 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 17:50:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113527 states. [2021-11-25 17:50:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113527 to 89203. [2021-11-25 17:50:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89203 states, 76395 states have (on average 1.5038549643301262) internal successors, (114887), 76654 states have internal predecessors, (114887), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2021-11-25 17:50:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89203 states to 89203 states and 134353 transitions. [2021-11-25 17:50:47,034 INFO L78 Accepts]: Start accepts. Automaton has 89203 states and 134353 transitions. Word has length 144 [2021-11-25 17:50:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:47,035 INFO L470 AbstractCegarLoop]: Abstraction has 89203 states and 134353 transitions. [2021-11-25 17:50:47,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 17:50:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 89203 states and 134353 transitions. [2021-11-25 17:50:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-25 17:50:47,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:47,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:50:47,169 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash 831757559, now seen corresponding path program 1 times [2021-11-25 17:50:47,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:47,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335227284] [2021-11-25 17:50:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:47,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 17:50:47,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335227284] [2021-11-25 17:50:47,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335227284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:47,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429820801] [2021-11-25 17:50:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:47,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:47,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:47,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 17:50:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:47,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 17:50:47,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:47,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429820801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:47,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:47,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 17:50:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440803872] [2021-11-25 17:50:47,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:47,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:47,813 INFO L87 Difference]: Start difference. First operand 89203 states and 134353 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:50:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:50:51,613 INFO L93 Difference]: Finished difference Result 157175 states and 240212 transitions. [2021-11-25 17:50:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:50:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 167 [2021-11-25 17:50:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:50:52,244 INFO L225 Difference]: With dead ends: 157175 [2021-11-25 17:50:52,245 INFO L226 Difference]: Without dead ends: 112371 [2021-11-25 17:50:52,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:52,386 INFO L933 BasicCegarLoop]: 3452 mSDtfsCounter, 134 mSDsluCounter, 3585 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 6778 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:50:52,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 6778 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:50:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112371 states. [2021-11-25 17:50:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112371 to 106227. [2021-11-25 17:50:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106227 states, 92907 states have (on average 1.5451903516419645) internal successors, (143559), 93166 states have internal predecessors, (143559), 9990 states have call successors, (9990), 3329 states have call predecessors, (9990), 3328 states have return successors, (9988), 9732 states have call predecessors, (9988), 9988 states have call successors, (9988) [2021-11-25 17:50:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106227 states to 106227 states and 163537 transitions. [2021-11-25 17:50:57,434 INFO L78 Accepts]: Start accepts. Automaton has 106227 states and 163537 transitions. Word has length 167 [2021-11-25 17:50:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:50:57,435 INFO L470 AbstractCegarLoop]: Abstraction has 106227 states and 163537 transitions. [2021-11-25 17:50:57,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:50:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 106227 states and 163537 transitions. [2021-11-25 17:50:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-25 17:50:57,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:50:57,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:50:57,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:50:57,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 17:50:57,939 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:50:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:50:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash -197473318, now seen corresponding path program 1 times [2021-11-25 17:50:57,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:50:57,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451017986] [2021-11-25 17:50:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:57,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:50:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 17:50:58,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:50:58,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451017986] [2021-11-25 17:50:58,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451017986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:50:58,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65324771] [2021-11-25 17:50:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:50:58,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:50:58,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:50:58,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:50:58,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eae3cc-b711-4fe4-8bf1-e8f0056c18f8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 17:50:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:50:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:50:58,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:50:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 17:50:58,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:50:58,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65324771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:50:58,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:50:58,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-11-25 17:50:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671722414] [2021-11-25 17:50:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:50:58,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:50:58,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:50:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:50:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:50:58,862 INFO L87 Difference]: Start difference. First operand 106227 states and 163537 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 17:51:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:05,191 INFO L93 Difference]: Finished difference Result 313852 states and 487642 transitions. [2021-11-25 17:51:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 220 [2021-11-25 17:51:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:06,017 INFO L225 Difference]: With dead ends: 313852 [2021-11-25 17:51:06,017 INFO L226 Difference]: Without dead ends: 209271 [2021-11-25 17:51:06,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:06,268 INFO L933 BasicCegarLoop]: 3334 mSDtfsCounter, 3475 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:06,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3475 Valid, 3582 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209271 states.