./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.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_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/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_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/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_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/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 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:06:41,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:06:41,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:06:41,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:06:41,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:06:41,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:06:41,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:06:41,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:06:41,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:06:41,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:06:41,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:06:41,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:06:41,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:06:41,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:06:41,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:06:41,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:06:41,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:06:41,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:06:41,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:06:41,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:06:41,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:06:41,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:06:41,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:06:41,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:06:41,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:06:41,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:06:41,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:06:41,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:06:41,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:06:41,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:06:41,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:06:41,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:06:41,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:06:41,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:06:41,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:06:41,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:06:41,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:06:41,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:06:41,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:06:41,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:06:41,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:06:41,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:06:41,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:06:41,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:06:41,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:06:41,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:06:41,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:06:41,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:06:41,480 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:06:41,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:06:41,481 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:06:41,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:06:41,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:06:41,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:06:41,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:06:41,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:06:41,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:06:41,483 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:06:41,483 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:06:41,483 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:06:41,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:06:41,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:06:41,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:06:41,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:06:41,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:06:41,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:06:41,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:06:41,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:06:41,488 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:06:41,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:06:41,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:06:41,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:06:41,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:06:41,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:06:41,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:06:41,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:06:41,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:06:41,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:06:41,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:06:41,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:06:41,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:06:41,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:06:41,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:06:41,491 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_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 [2021-11-25 18:06:41,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:06:41,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:06:41,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:06:41,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:06:41,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:06:41,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2021-11-25 18:06:41,865 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/data/c07f49813/dd9b4cff459445c69a1da44f60854784/FLAG520492c9c [2021-11-25 18:06:42,502 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:06:42,502 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2021-11-25 18:06:42,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/data/c07f49813/dd9b4cff459445c69a1da44f60854784/FLAG520492c9c [2021-11-25 18:06:42,688 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/data/c07f49813/dd9b4cff459445c69a1da44f60854784 [2021-11-25 18:06:42,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:06:42,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:06:42,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:06:42,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:06:42,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:06:42,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:06:42" (1/1) ... [2021-11-25 18:06:42,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6c291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:42, skipping insertion in model container [2021-11-25 18:06:42,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:06:42" (1/1) ... [2021-11-25 18:06:42,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:06:42,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:06:43,470 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_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2021-11-25 18:06:43,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:06:43,534 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:06:43,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2021-11-25 18:06:43,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:06:43,830 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:06:43,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43 WrapperNode [2021-11-25 18:06:43,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:06:43,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:06:43,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:06:43,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:06:43,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:43,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,024 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-25 18:06:44,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:06:44,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:06:44,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:06:44,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:06:44,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:06:44,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:06:44,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:06:44,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:06:44,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (1/1) ... [2021-11-25 18:06:44,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:06:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:44,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:06:44,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:06:44,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:06:44,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:06:44,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:06:44,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:06:44,309 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:06:44,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:06:45,950 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:06:46,210 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:06:46,210 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:06:46,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:06:46 BoogieIcfgContainer [2021-11-25 18:06:46,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:06:46,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:06:46,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:06:46,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:06:46,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:06:42" (1/3) ... [2021-11-25 18:06:46,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20081e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:06:46, skipping insertion in model container [2021-11-25 18:06:46,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:06:43" (2/3) ... [2021-11-25 18:06:46,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20081e13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:06:46, skipping insertion in model container [2021-11-25 18:06:46,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:06:46" (3/3) ... [2021-11-25 18:06:46,223 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2021-11-25 18:06:46,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:06:46,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:06:46,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:06:46,332 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 18:06:46,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:06:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 18:06:46,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:46,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:46,381 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:46,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:46,386 INFO L85 PathProgramCache]: Analyzing trace with hash 209339063, now seen corresponding path program 1 times [2021-11-25 18:06:46,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:46,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184883255] [2021-11-25 18:06:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:46,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:46,991 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 18:06:46,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:46,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184883255] [2021-11-25 18:06:46,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184883255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:46,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:46,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:06:46,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557008061] [2021-11-25 18:06:46,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:47,036 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:47,992 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-25 18:06:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-25 18:06:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:48,008 INFO L225 Difference]: With dead ends: 440 [2021-11-25 18:06:48,008 INFO L226 Difference]: Without dead ends: 289 [2021-11-25 18:06:48,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:48,015 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:48,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:06:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-25 18:06:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-25 18:06:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.5868055555555556) internal successors, (457), 288 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 457 transitions. [2021-11-25 18:06:48,072 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 457 transitions. Word has length 143 [2021-11-25 18:06:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 457 transitions. [2021-11-25 18:06:48,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 457 transitions. [2021-11-25 18:06:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 18:06:48,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:48,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:48,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:06:48,079 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1094379350, now seen corresponding path program 1 times [2021-11-25 18:06:48,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:48,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144568784] [2021-11-25 18:06:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:48,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:06:48,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144568784] [2021-11-25 18:06:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144568784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:48,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:48,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:06:48,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514224709] [2021-11-25 18:06:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:48,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:48,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:48,220 INFO L87 Difference]: Start difference. First operand 289 states and 457 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:48,990 INFO L93 Difference]: Finished difference Result 863 states and 1368 transitions. [2021-11-25 18:06:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-25 18:06:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:48,996 INFO L225 Difference]: With dead ends: 863 [2021-11-25 18:06:48,996 INFO L226 Difference]: Without dead ends: 575 [2021-11-25 18:06:48,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:48,999 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:49,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:06:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-25 18:06:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-25 18:06:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5452961672473868) internal successors, (887), 574 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 887 transitions. [2021-11-25 18:06:49,078 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 887 transitions. Word has length 151 [2021-11-25 18:06:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:49,078 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 887 transitions. [2021-11-25 18:06:49,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 887 transitions. [2021-11-25 18:06:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 18:06:49,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:49,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:49,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:06:49,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash -316859173, now seen corresponding path program 1 times [2021-11-25 18:06:49,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:49,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167976945] [2021-11-25 18:06:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:49,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:06:49,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167976945] [2021-11-25 18:06:49,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167976945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:49,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:49,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:49,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355210195] [2021-11-25 18:06:49,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:49,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:49,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:49,432 INFO L87 Difference]: Start difference. First operand 575 states and 887 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:50,096 INFO L93 Difference]: Finished difference Result 1435 states and 2321 transitions. [2021-11-25 18:06:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-25 18:06:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:50,103 INFO L225 Difference]: With dead ends: 1435 [2021-11-25 18:06:50,103 INFO L226 Difference]: Without dead ends: 861 [2021-11-25 18:06:50,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:50,108 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:50,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 205 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:06:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-25 18:06:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2021-11-25 18:06:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.563953488372093) internal successors, (1345), 860 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1345 transitions. [2021-11-25 18:06:50,174 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1345 transitions. Word has length 158 [2021-11-25 18:06:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:50,176 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1345 transitions. [2021-11-25 18:06:50,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1345 transitions. [2021-11-25 18:06:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-25 18:06:50,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:50,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:50,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:06:50,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:50,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1352607243, now seen corresponding path program 1 times [2021-11-25 18:06:50,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632999524] [2021-11-25 18:06:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:50,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:06:50,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632999524] [2021-11-25 18:06:50,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632999524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:50,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:50,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:50,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382853314] [2021-11-25 18:06:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:50,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:50,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:50,330 INFO L87 Difference]: Start difference. First operand 861 states and 1345 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:51,209 INFO L93 Difference]: Finished difference Result 2579 states and 4032 transitions. [2021-11-25 18:06:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:06:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-25 18:06:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:51,220 INFO L225 Difference]: With dead ends: 2579 [2021-11-25 18:06:51,220 INFO L226 Difference]: Without dead ends: 1719 [2021-11-25 18:06:51,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:51,224 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 397 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:51,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 11 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:06:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-25 18:06:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-25 18:06:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.438882421420256) internal successors, (2472), 1718 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2472 transitions. [2021-11-25 18:06:51,281 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2472 transitions. Word has length 168 [2021-11-25 18:06:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:51,282 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2472 transitions. [2021-11-25 18:06:51,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2472 transitions. [2021-11-25 18:06:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-25 18:06:51,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:51,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:51,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:06:51,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 629673938, now seen corresponding path program 1 times [2021-11-25 18:06:51,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586058228] [2021-11-25 18:06:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:51,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:06:51,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586058228] [2021-11-25 18:06:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586058228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:51,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:51,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:51,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490801128] [2021-11-25 18:06:51,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:51,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:51,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:51,408 INFO L87 Difference]: Start difference. First operand 1719 states and 2472 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:52,043 INFO L93 Difference]: Finished difference Result 3723 states and 5374 transitions. [2021-11-25 18:06:52,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:52,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-25 18:06:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:52,053 INFO L225 Difference]: With dead ends: 3723 [2021-11-25 18:06:52,053 INFO L226 Difference]: Without dead ends: 2005 [2021-11-25 18:06:52,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:52,067 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 222 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:06:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-11-25 18:06:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 2005. [2021-11-25 18:06:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.4201596806387227) internal successors, (2846), 2004 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2846 transitions. [2021-11-25 18:06:52,125 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2846 transitions. Word has length 192 [2021-11-25 18:06:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 2846 transitions. [2021-11-25 18:06:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2846 transitions. [2021-11-25 18:06:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 18:06:52,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:52,139 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:52,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:06:52,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1350111498, now seen corresponding path program 1 times [2021-11-25 18:06:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544530691] [2021-11-25 18:06:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:52,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:06:52,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:52,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544530691] [2021-11-25 18:06:52,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544530691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:52,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:52,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:52,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787388315] [2021-11-25 18:06:52,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:52,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:52,235 INFO L87 Difference]: Start difference. First operand 2005 states and 2846 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:52,926 INFO L93 Difference]: Finished difference Result 5439 states and 7888 transitions. [2021-11-25 18:06:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-11-25 18:06:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:52,966 INFO L225 Difference]: With dead ends: 5439 [2021-11-25 18:06:52,966 INFO L226 Difference]: Without dead ends: 3435 [2021-11-25 18:06:52,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:52,970 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 147 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:52,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 260 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:06:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-25 18:06:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2021-11-25 18:06:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.290331974373908) internal successors, (4431), 3434 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4431 transitions. [2021-11-25 18:06:53,076 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4431 transitions. Word has length 198 [2021-11-25 18:06:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 4431 transitions. [2021-11-25 18:06:53,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4431 transitions. [2021-11-25 18:06:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-25 18:06:53,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:53,087 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:53,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:06:53,087 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash -22373969, now seen corresponding path program 1 times [2021-11-25 18:06:53,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100667565] [2021-11-25 18:06:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:53,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:06:53,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100667565] [2021-11-25 18:06:53,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100667565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:53,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:53,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:06:53,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438716134] [2021-11-25 18:06:53,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:53,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:53,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:53,194 INFO L87 Difference]: Start difference. First operand 3435 states and 4431 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:53,938 INFO L93 Difference]: Finished difference Result 9445 states and 12225 transitions. [2021-11-25 18:06:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-25 18:06:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:53,970 INFO L225 Difference]: With dead ends: 9445 [2021-11-25 18:06:53,970 INFO L226 Difference]: Without dead ends: 6011 [2021-11-25 18:06:53,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:53,976 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:53,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 115 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:06:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-11-25 18:06:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 6009. [2021-11-25 18:06:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 1.2911118508655126) internal successors, (7757), 6008 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 7757 transitions. [2021-11-25 18:06:54,187 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 7757 transitions. Word has length 207 [2021-11-25 18:06:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:54,187 INFO L470 AbstractCegarLoop]: Abstraction has 6009 states and 7757 transitions. [2021-11-25 18:06:54,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:54,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 7757 transitions. [2021-11-25 18:06:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-25 18:06:54,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:54,198 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:54,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:06:54,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1544401897, now seen corresponding path program 1 times [2021-11-25 18:06:54,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200918613] [2021-11-25 18:06:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:54,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:06:54,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:54,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200918613] [2021-11-25 18:06:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200918613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:54,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:54,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:06:54,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562779631] [2021-11-25 18:06:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:06:54,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:06:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:54,334 INFO L87 Difference]: Start difference. First operand 6009 states and 7757 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:55,367 INFO L93 Difference]: Finished difference Result 12017 states and 15536 transitions. [2021-11-25 18:06:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:06:55,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-25 18:06:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:55,400 INFO L225 Difference]: With dead ends: 12017 [2021-11-25 18:06:55,400 INFO L226 Difference]: Without dead ends: 6295 [2021-11-25 18:06:55,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:06:55,461 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 247 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:55,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 36 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:06:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2021-11-25 18:06:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6009. [2021-11-25 18:06:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 1.2911118508655126) internal successors, (7757), 6008 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 7757 transitions. [2021-11-25 18:06:55,603 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 7757 transitions. Word has length 208 [2021-11-25 18:06:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:55,603 INFO L470 AbstractCegarLoop]: Abstraction has 6009 states and 7757 transitions. [2021-11-25 18:06:55,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 7757 transitions. [2021-11-25 18:06:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-25 18:06:55,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:55,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:55,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:06:55,614 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:55,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:55,615 INFO L85 PathProgramCache]: Analyzing trace with hash 256293426, now seen corresponding path program 1 times [2021-11-25 18:06:55,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:55,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650504940] [2021-11-25 18:06:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:55,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:06:55,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650504940] [2021-11-25 18:06:55,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650504940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:55,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213670941] [2021-11-25 18:06:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:55,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:55,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:55,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:06:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:06:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:06:56,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213670941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:56,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:06:56,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 18:06:56,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361168869] [2021-11-25 18:06:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:56,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:56,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:56,252 INFO L87 Difference]: Start difference. First operand 6009 states and 7757 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:56,983 INFO L93 Difference]: Finished difference Result 14019 states and 18237 transitions. [2021-11-25 18:06:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-25 18:06:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:57,034 INFO L225 Difference]: With dead ends: 14019 [2021-11-25 18:06:57,034 INFO L226 Difference]: Without dead ends: 8297 [2021-11-25 18:06:57,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:57,044 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:57,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 223 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:06:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2021-11-25 18:06:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 8011. [2021-11-25 18:06:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8011 states, 8010 states have (on average 1.2871410736579276) internal successors, (10310), 8010 states have internal predecessors, (10310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8011 states to 8011 states and 10310 transitions. [2021-11-25 18:06:57,234 INFO L78 Accepts]: Start accepts. Automaton has 8011 states and 10310 transitions. Word has length 215 [2021-11-25 18:06:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:57,235 INFO L470 AbstractCegarLoop]: Abstraction has 8011 states and 10310 transitions. [2021-11-25 18:06:57,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8011 states and 10310 transitions. [2021-11-25 18:06:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-25 18:06:57,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:57,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:06:57,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:57,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:06:57,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:57,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2087245273, now seen corresponding path program 1 times [2021-11-25 18:06:57,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:57,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974397915] [2021-11-25 18:06:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:57,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 18:06:57,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974397915] [2021-11-25 18:06:57,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974397915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:06:57,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295226727] [2021-11-25 18:06:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:57,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:06:57,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:06:57,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:06:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:06:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:06:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:06:58,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:06:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295226727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:58,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:06:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 18:06:58,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383725262] [2021-11-25 18:06:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:58,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:58,349 INFO L87 Difference]: Start difference. First operand 8011 states and 10310 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:06:59,068 INFO L93 Difference]: Finished difference Result 18452 states and 23844 transitions. [2021-11-25 18:06:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:06:59,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-11-25 18:06:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:06:59,093 INFO L225 Difference]: With dead ends: 18452 [2021-11-25 18:06:59,093 INFO L226 Difference]: Without dead ends: 10728 [2021-11-25 18:06:59,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:06:59,104 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:06:59,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 256 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:06:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-11-25 18:06:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10442. [2021-11-25 18:06:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 1.2429843884685374) internal successors, (12978), 10441 states have internal predecessors, (12978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 12978 transitions. [2021-11-25 18:06:59,367 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 12978 transitions. Word has length 235 [2021-11-25 18:06:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:06:59,367 INFO L470 AbstractCegarLoop]: Abstraction has 10442 states and 12978 transitions. [2021-11-25 18:06:59,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:06:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 12978 transitions. [2021-11-25 18:06:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-25 18:06:59,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:06:59,387 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:59,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:06:59,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:06:59,613 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:06:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:06:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1472864858, now seen corresponding path program 2 times [2021-11-25 18:06:59,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:06:59,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794968219] [2021-11-25 18:06:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:06:59,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:06:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:06:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-25 18:06:59,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:06:59,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794968219] [2021-11-25 18:06:59,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794968219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:06:59,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:06:59,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:06:59,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692496931] [2021-11-25 18:06:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:06:59,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:06:59,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:06:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:06:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:06:59,733 INFO L87 Difference]: Start difference. First operand 10442 states and 12978 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:00,349 INFO L93 Difference]: Finished difference Result 20883 states and 25956 transitions. [2021-11-25 18:07:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-11-25 18:07:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:00,368 INFO L225 Difference]: With dead ends: 20883 [2021-11-25 18:07:00,368 INFO L226 Difference]: Without dead ends: 11014 [2021-11-25 18:07:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:00,380 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 100 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:07:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11014 states. [2021-11-25 18:07:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11014 to 11014. [2021-11-25 18:07:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 1.236992645055843) internal successors, (13623), 11013 states have internal predecessors, (13623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 13623 transitions. [2021-11-25 18:07:00,642 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 13623 transitions. Word has length 241 [2021-11-25 18:07:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:00,643 INFO L470 AbstractCegarLoop]: Abstraction has 11014 states and 13623 transitions. [2021-11-25 18:07:00,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 13623 transitions. [2021-11-25 18:07:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-25 18:07:00,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:00,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:00,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:07:00,660 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1199324913, now seen corresponding path program 1 times [2021-11-25 18:07:00,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:00,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904018673] [2021-11-25 18:07:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:00,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 18:07:00,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:00,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904018673] [2021-11-25 18:07:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904018673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:00,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:00,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:00,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683028726] [2021-11-25 18:07:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:00,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:00,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:00,780 INFO L87 Difference]: Start difference. First operand 11014 states and 13623 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:01,582 INFO L93 Difference]: Finished difference Result 23459 states and 29187 transitions. [2021-11-25 18:07:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-25 18:07:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:01,606 INFO L225 Difference]: With dead ends: 23459 [2021-11-25 18:07:01,607 INFO L226 Difference]: Without dead ends: 13876 [2021-11-25 18:07:01,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:01,618 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 96 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:01,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 100 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:07:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13876 states. [2021-11-25 18:07:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13876 to 13874. [2021-11-25 18:07:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13874 states, 13873 states have (on average 1.2277805809846465) internal successors, (17033), 13873 states have internal predecessors, (17033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:01,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13874 states to 13874 states and 17033 transitions. [2021-11-25 18:07:01,915 INFO L78 Accepts]: Start accepts. Automaton has 13874 states and 17033 transitions. Word has length 250 [2021-11-25 18:07:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:01,916 INFO L470 AbstractCegarLoop]: Abstraction has 13874 states and 17033 transitions. [2021-11-25 18:07:01,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 13874 states and 17033 transitions. [2021-11-25 18:07:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 18:07:01,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:01,939 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:07:01,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -696434758, now seen corresponding path program 1 times [2021-11-25 18:07:01,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069114154] [2021-11-25 18:07:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:01,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:02,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:02,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069114154] [2021-11-25 18:07:02,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069114154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:02,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:02,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:02,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598795229] [2021-11-25 18:07:02,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:02,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:02,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:02,112 INFO L87 Difference]: Start difference. First operand 13874 states and 17033 transitions. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:03,161 INFO L93 Difference]: Finished difference Result 36472 states and 45138 transitions. [2021-11-25 18:07:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-25 18:07:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:03,203 INFO L225 Difference]: With dead ends: 36472 [2021-11-25 18:07:03,203 INFO L226 Difference]: Without dead ends: 23886 [2021-11-25 18:07:03,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:07:03,217 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 401 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:03,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 199 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:07:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23886 states. [2021-11-25 18:07:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23886 to 23312. [2021-11-25 18:07:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23312 states, 23311 states have (on average 1.2202822701728797) internal successors, (28446), 23311 states have internal predecessors, (28446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23312 states to 23312 states and 28446 transitions. [2021-11-25 18:07:03,694 INFO L78 Accepts]: Start accepts. Automaton has 23312 states and 28446 transitions. Word has length 251 [2021-11-25 18:07:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:03,695 INFO L470 AbstractCegarLoop]: Abstraction has 23312 states and 28446 transitions. [2021-11-25 18:07:03,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 23312 states and 28446 transitions. [2021-11-25 18:07:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-25 18:07:03,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:03,728 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:03,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:07:03,729 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash -344694515, now seen corresponding path program 1 times [2021-11-25 18:07:03,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808957572] [2021-11-25 18:07:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:03,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 18:07:03,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:03,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808957572] [2021-11-25 18:07:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808957572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:03,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:03,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843453580] [2021-11-25 18:07:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:03,884 INFO L87 Difference]: Start difference. First operand 23312 states and 28446 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:04,776 INFO L93 Difference]: Finished difference Result 50484 states and 62186 transitions. [2021-11-25 18:07:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-25 18:07:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:04,822 INFO L225 Difference]: With dead ends: 50484 [2021-11-25 18:07:04,822 INFO L226 Difference]: Without dead ends: 28174 [2021-11-25 18:07:04,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:04,839 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:04,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 99 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:07:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28174 states. [2021-11-25 18:07:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28174 to 26458. [2021-11-25 18:07:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26458 states, 26457 states have (on average 1.1838454851268096) internal successors, (31321), 26457 states have internal predecessors, (31321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26458 states to 26458 states and 31321 transitions. [2021-11-25 18:07:05,363 INFO L78 Accepts]: Start accepts. Automaton has 26458 states and 31321 transitions. Word has length 266 [2021-11-25 18:07:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:05,364 INFO L470 AbstractCegarLoop]: Abstraction has 26458 states and 31321 transitions. [2021-11-25 18:07:05,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 26458 states and 31321 transitions. [2021-11-25 18:07:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-25 18:07:05,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:05,390 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-25 18:07:05,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:07:05,390 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1908393573, now seen corresponding path program 1 times [2021-11-25 18:07:05,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:05,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092842686] [2021-11-25 18:07:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:05,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:07:05,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092842686] [2021-11-25 18:07:05,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092842686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:05,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:05,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:05,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402171368] [2021-11-25 18:07:05,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:05,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:05,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:05,642 INFO L87 Difference]: Start difference. First operand 26458 states and 31321 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:06,597 INFO L93 Difference]: Finished difference Result 53058 states and 62774 transitions. [2021-11-25 18:07:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:06,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-25 18:07:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:06,637 INFO L225 Difference]: With dead ends: 53058 [2021-11-25 18:07:06,638 INFO L226 Difference]: Without dead ends: 27602 [2021-11-25 18:07:06,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:06,653 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:06,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:07:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27602 states. [2021-11-25 18:07:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27602 to 26887. [2021-11-25 18:07:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26887 states, 26886 states have (on average 1.1806888343375734) internal successors, (31744), 26886 states have internal predecessors, (31744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26887 states to 26887 states and 31744 transitions. [2021-11-25 18:07:07,141 INFO L78 Accepts]: Start accepts. Automaton has 26887 states and 31744 transitions. Word has length 271 [2021-11-25 18:07:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:07,142 INFO L470 AbstractCegarLoop]: Abstraction has 26887 states and 31744 transitions. [2021-11-25 18:07:07,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26887 states and 31744 transitions. [2021-11-25 18:07:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-25 18:07:07,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:07,159 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:07,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:07:07,160 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1251129503, now seen corresponding path program 1 times [2021-11-25 18:07:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:07,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846295080] [2021-11-25 18:07:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:07,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 18:07:07,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846295080] [2021-11-25 18:07:07,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846295080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:07,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:07,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:07,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433994991] [2021-11-25 18:07:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:07,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:07,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:07,328 INFO L87 Difference]: Start difference. First operand 26887 states and 31744 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:08,116 INFO L93 Difference]: Finished difference Result 53201 states and 62844 transitions. [2021-11-25 18:07:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-25 18:07:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:08,163 INFO L225 Difference]: With dead ends: 53201 [2021-11-25 18:07:08,163 INFO L226 Difference]: Without dead ends: 27316 [2021-11-25 18:07:08,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:08,178 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:08,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 100 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:07:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27316 states. [2021-11-25 18:07:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27316 to 27316. [2021-11-25 18:07:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27316 states, 27315 states have (on average 1.1796814936847886) internal successors, (32223), 27315 states have internal predecessors, (32223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27316 states to 27316 states and 32223 transitions. [2021-11-25 18:07:08,738 INFO L78 Accepts]: Start accepts. Automaton has 27316 states and 32223 transitions. Word has length 271 [2021-11-25 18:07:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:08,739 INFO L470 AbstractCegarLoop]: Abstraction has 27316 states and 32223 transitions. [2021-11-25 18:07:08,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27316 states and 32223 transitions. [2021-11-25 18:07:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-25 18:07:08,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:08,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:08,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:07:08,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1139442342, now seen corresponding path program 1 times [2021-11-25 18:07:08,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674893268] [2021-11-25 18:07:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:08,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-25 18:07:08,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:08,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674893268] [2021-11-25 18:07:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674893268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:08,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:08,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015949017] [2021-11-25 18:07:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:08,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:08,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:08,934 INFO L87 Difference]: Start difference. First operand 27316 states and 32223 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:09,832 INFO L93 Difference]: Finished difference Result 60496 states and 71915 transitions. [2021-11-25 18:07:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-25 18:07:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:09,866 INFO L225 Difference]: With dead ends: 60496 [2021-11-25 18:07:09,867 INFO L226 Difference]: Without dead ends: 34325 [2021-11-25 18:07:09,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:09,882 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:09,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 99 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:07:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34325 states. [2021-11-25 18:07:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34325 to 31034. [2021-11-25 18:07:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31034 states, 31033 states have (on average 1.1988206103180485) internal successors, (37203), 31033 states have internal predecessors, (37203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31034 states to 31034 states and 37203 transitions. [2021-11-25 18:07:10,422 INFO L78 Accepts]: Start accepts. Automaton has 31034 states and 37203 transitions. Word has length 271 [2021-11-25 18:07:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:10,422 INFO L470 AbstractCegarLoop]: Abstraction has 31034 states and 37203 transitions. [2021-11-25 18:07:10,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 31034 states and 37203 transitions. [2021-11-25 18:07:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-25 18:07:10,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:10,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:10,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 18:07:10,442 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1568812667, now seen corresponding path program 1 times [2021-11-25 18:07:10,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:10,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713082210] [2021-11-25 18:07:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:10,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:07:10,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:10,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713082210] [2021-11-25 18:07:10,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713082210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:10,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:10,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:07:10,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464970477] [2021-11-25 18:07:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:10,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:10,612 INFO L87 Difference]: Start difference. First operand 31034 states and 37203 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:11,564 INFO L93 Difference]: Finished difference Result 63068 states and 75356 transitions. [2021-11-25 18:07:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2021-11-25 18:07:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:11,595 INFO L225 Difference]: With dead ends: 63068 [2021-11-25 18:07:11,595 INFO L226 Difference]: Without dead ends: 30319 [2021-11-25 18:07:11,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:11,612 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:11,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 257 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:07:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30319 states. [2021-11-25 18:07:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30319 to 29032. [2021-11-25 18:07:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29032 states, 29031 states have (on average 1.1201474286107953) internal successors, (32519), 29031 states have internal predecessors, (32519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29032 states to 29032 states and 32519 transitions. [2021-11-25 18:07:12,116 INFO L78 Accepts]: Start accepts. Automaton has 29032 states and 32519 transitions. Word has length 290 [2021-11-25 18:07:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:12,116 INFO L470 AbstractCegarLoop]: Abstraction has 29032 states and 32519 transitions. [2021-11-25 18:07:12,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 29032 states and 32519 transitions. [2021-11-25 18:07:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-25 18:07:12,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:12,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:12,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 18:07:12,136 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1587659696, now seen corresponding path program 1 times [2021-11-25 18:07:12,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:12,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220589984] [2021-11-25 18:07:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:12,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 151 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-25 18:07:12,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220589984] [2021-11-25 18:07:12,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220589984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:12,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369937812] [2021-11-25 18:07:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:12,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:12,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:12,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:07:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:07:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-25 18:07:13,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369937812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:13,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:13,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 18:07:13,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636494889] [2021-11-25 18:07:13,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:13,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:13,187 INFO L87 Difference]: Start difference. First operand 29032 states and 32519 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:13,891 INFO L93 Difference]: Finished difference Result 59636 states and 67330 transitions. [2021-11-25 18:07:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-11-25 18:07:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:13,925 INFO L225 Difference]: With dead ends: 59636 [2021-11-25 18:07:13,925 INFO L226 Difference]: Without dead ends: 32035 [2021-11-25 18:07:13,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:13,941 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:13,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:07:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32035 states. [2021-11-25 18:07:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32035 to 31463. [2021-11-25 18:07:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31463 states, 31462 states have (on average 1.1284088741974445) internal successors, (35502), 31462 states have internal predecessors, (35502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31463 states to 31463 states and 35502 transitions. [2021-11-25 18:07:14,535 INFO L78 Accepts]: Start accepts. Automaton has 31463 states and 35502 transitions. Word has length 292 [2021-11-25 18:07:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:14,536 INFO L470 AbstractCegarLoop]: Abstraction has 31463 states and 35502 transitions. [2021-11-25 18:07:14,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 31463 states and 35502 transitions. [2021-11-25 18:07:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-25 18:07:14,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:14,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:07:14,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:14,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:14,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1420498883, now seen corresponding path program 1 times [2021-11-25 18:07:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076838865] [2021-11-25 18:07:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:14,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-25 18:07:14,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076838865] [2021-11-25 18:07:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076838865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:14,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:07:14,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:07:14,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976366711] [2021-11-25 18:07:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:14,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:14,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:14,875 INFO L87 Difference]: Start difference. First operand 31463 states and 35502 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:15,522 INFO L93 Difference]: Finished difference Result 68647 states and 77375 transitions. [2021-11-25 18:07:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:15,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-11-25 18:07:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:15,550 INFO L225 Difference]: With dead ends: 68647 [2021-11-25 18:07:15,551 INFO L226 Difference]: Without dead ends: 38615 [2021-11-25 18:07:15,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:07:15,565 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 130 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:15,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 56 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:07:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38615 states. [2021-11-25 18:07:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38615 to 38327. [2021-11-25 18:07:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38327 states, 38326 states have (on average 1.1223190523404478) internal successors, (43014), 38326 states have internal predecessors, (43014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38327 states to 38327 states and 43014 transitions. [2021-11-25 18:07:16,287 INFO L78 Accepts]: Start accepts. Automaton has 38327 states and 43014 transitions. Word has length 303 [2021-11-25 18:07:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:16,287 INFO L470 AbstractCegarLoop]: Abstraction has 38327 states and 43014 transitions. [2021-11-25 18:07:16,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38327 states and 43014 transitions. [2021-11-25 18:07:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-25 18:07:16,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:16,304 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:16,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 18:07:16,304 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1711294466, now seen corresponding path program 1 times [2021-11-25 18:07:16,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659385057] [2021-11-25 18:07:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:16,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 165 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 18:07:16,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659385057] [2021-11-25 18:07:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659385057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018404680] [2021-11-25 18:07:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:16,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:16,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:07:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:07:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-25 18:07:17,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:17,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018404680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:17,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:17,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-25 18:07:17,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139523529] [2021-11-25 18:07:17,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:17,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:07:17,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:17,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:07:17,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:17,282 INFO L87 Difference]: Start difference. First operand 38327 states and 43014 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:18,152 INFO L93 Difference]: Finished difference Result 78798 states and 88607 transitions. [2021-11-25 18:07:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:07:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2021-11-25 18:07:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:18,195 INFO L225 Difference]: With dead ends: 78798 [2021-11-25 18:07:18,195 INFO L226 Difference]: Without dead ends: 41759 [2021-11-25 18:07:18,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:18,215 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 262 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:18,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 58 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:07:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41759 states. [2021-11-25 18:07:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41759 to 39614. [2021-11-25 18:07:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 1.1044354126170701) internal successors, (43750), 39613 states have internal predecessors, (43750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 43750 transitions. [2021-11-25 18:07:18,901 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 43750 transitions. Word has length 303 [2021-11-25 18:07:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:18,901 INFO L470 AbstractCegarLoop]: Abstraction has 39614 states and 43750 transitions. [2021-11-25 18:07:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 43750 transitions. [2021-11-25 18:07:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-25 18:07:18,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:18,913 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:18,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:19,121 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 772584184, now seen corresponding path program 1 times [2021-11-25 18:07:19,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:19,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228364094] [2021-11-25 18:07:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:19,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-25 18:07:19,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:19,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228364094] [2021-11-25 18:07:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228364094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:19,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083642896] [2021-11-25 18:07:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:19,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:19,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:19,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:19,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:07:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:07:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 18:07:20,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:07:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083642896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:07:20,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:07:20,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-25 18:07:20,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32751863] [2021-11-25 18:07:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:07:20,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:07:20,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:07:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:07:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:20,017 INFO L87 Difference]: Start difference. First operand 39614 states and 43750 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:07:20,582 INFO L93 Difference]: Finished difference Result 83376 states and 92383 transitions. [2021-11-25 18:07:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:07:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2021-11-25 18:07:20,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:07:20,618 INFO L225 Difference]: With dead ends: 83376 [2021-11-25 18:07:20,618 INFO L226 Difference]: Without dead ends: 45050 [2021-11-25 18:07:20,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:07:20,633 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 123 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:07:20,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 67 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:07:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45050 states. [2021-11-25 18:07:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45050 to 39757. [2021-11-25 18:07:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39757 states, 39756 states have (on average 1.0971425696750177) internal successors, (43618), 39756 states have internal predecessors, (43618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39757 states to 39757 states and 43618 transitions. [2021-11-25 18:07:21,265 INFO L78 Accepts]: Start accepts. Automaton has 39757 states and 43618 transitions. Word has length 319 [2021-11-25 18:07:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:07:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 39757 states and 43618 transitions. [2021-11-25 18:07:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:07:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 39757 states and 43618 transitions. [2021-11-25 18:07:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-25 18:07:21,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:07:21,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 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] [2021-11-25 18:07:21,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:07:21,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:21,485 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:07:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:07:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1388128313, now seen corresponding path program 1 times [2021-11-25 18:07:21,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:07:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734106493] [2021-11-25 18:07:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:21,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:07:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 181 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:07:21,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:07:21,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734106493] [2021-11-25 18:07:21,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734106493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:07:21,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011755576] [2021-11-25 18:07:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:07:21,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:07:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:07:21,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:07:21,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_409b9cb2-c5b1-4d69-8b64-b22e038cff3d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:07:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:07:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:07:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:07:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:07:22,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:07:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:07:23,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011755576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:07:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264560249] [2021-11-25 18:07:23,508 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2021-11-25 18:07:23,508 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:07:23,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:07:23,518 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:07:23,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs