./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.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_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/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_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/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_7d66ec12-de54-4815-b30d-362d234c5c04/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 942b42bc5f58abe69fc33c6ef5e7218e2daddc6d3f26d56a942671edcc0207b7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:37:33,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:37:33,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:37:33,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:37:33,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:37:33,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:37:33,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:37:33,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:37:33,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:37:33,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:37:33,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:37:33,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:37:33,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:37:33,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:37:33,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:37:33,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:37:33,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:37:33,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:37:33,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:37:33,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:37:33,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:37:33,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:37:33,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:37:33,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:37:33,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:37:33,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:37:33,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:37:33,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:37:33,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:37:33,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:37:33,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:37:33,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:37:33,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:37:33,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:37:33,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:37:33,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:37:33,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:37:33,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:37:33,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:37:33,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:37:33,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:37:33,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:37:34,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:37:34,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:37:34,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:37:34,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:37:34,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:37:34,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:37:34,037 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:37:34,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:37:34,038 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:37:34,038 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:37:34,039 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:37:34,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:37:34,040 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:37:34,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:37:34,040 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:37:34,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:37:34,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:37:34,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:37:34,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:37:34,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:37:34,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:37:34,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:37:34,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:37:34,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:37:34,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:37:34,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:37:34,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:37:34,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:37:34,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:37:34,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:37:34,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:37:34,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:37:34,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:34,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:37:34,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:37:34,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:37:34,052 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:37:34,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:37:34,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:37:34,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:37:34,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:37:34,053 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_7d66ec12-de54-4815-b30d-362d234c5c04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 942b42bc5f58abe69fc33c6ef5e7218e2daddc6d3f26d56a942671edcc0207b7 [2021-11-25 20:37:34,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:37:34,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:37:34,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:37:34,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:37:34,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:37:34,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c [2021-11-25 20:37:34,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/data/f70fd9ae7/e2abc4d144c94f27abb4e9a223cda888/FLAG0f1ffdf13 [2021-11-25 20:37:35,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:37:35,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c [2021-11-25 20:37:35,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/data/f70fd9ae7/e2abc4d144c94f27abb4e9a223cda888/FLAG0f1ffdf13 [2021-11-25 20:37:35,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/data/f70fd9ae7/e2abc4d144c94f27abb4e9a223cda888 [2021-11-25 20:37:35,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:37:35,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:37:35,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:35,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:37:35,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:37:35,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:35" (1/1) ... [2021-11-25 20:37:35,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76815996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:35, skipping insertion in model container [2021-11-25 20:37:35,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:35" (1/1) ... [2021-11-25 20:37:35,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:37:35,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:37:36,007 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_7d66ec12-de54-4815-b30d-362d234c5c04/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c[37595,37608] [2021-11-25 20:37:36,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:36,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:37:36,130 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_7d66ec12-de54-4815-b30d-362d234c5c04/sv-benchmarks/c/openssl-simplified/s3_clnt_3.cil-3.c[37595,37608] [2021-11-25 20:37:36,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:36,147 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:37:36,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36 WrapperNode [2021-11-25 20:37:36,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:36,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:36,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:37:36,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:37:36,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,208 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 526 [2021-11-25 20:37:36,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:36,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:37:36,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:37:36,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:37:36,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:37:36,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:37:36,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:37:36,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:37:36,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (1/1) ... [2021-11-25 20:37:36,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:36,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:37:36,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:37:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:37:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:37:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:37:36,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:37:36,608 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:37:36,609 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:37:36,628 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 20:37:37,287 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-25 20:37:37,287 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-25 20:37:37,287 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:37:37,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:37:37,577 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:37:37,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:37 BoogieIcfgContainer [2021-11-25 20:37:37,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:37:37,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:37:37,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:37:37,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:37:37,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:37:35" (1/3) ... [2021-11-25 20:37:37,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c727d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:37, skipping insertion in model container [2021-11-25 20:37:37,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:36" (2/3) ... [2021-11-25 20:37:37,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c727d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:37, skipping insertion in model container [2021-11-25 20:37:37,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:37" (3/3) ... [2021-11-25 20:37:37,599 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-3.c [2021-11-25 20:37:37,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:37:37,605 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:37:37,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:37:37,669 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 20:37:37,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:37:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 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 20:37:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:37:37,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:37,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:37,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1391944844, now seen corresponding path program 1 times [2021-11-25 20:37:37,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:37,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799052944] [2021-11-25 20:37:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:37,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:38,011 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 20:37:38,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:38,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799052944] [2021-11-25 20:37:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799052944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:38,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:38,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:38,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129243072] [2021-11-25 20:37:38,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:38,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:38,070 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 20:37:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:38,399 INFO L93 Difference]: Finished difference Result 198 states and 340 transitions. [2021-11-25 20:37:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2021-11-25 20:37:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:38,412 INFO L225 Difference]: With dead ends: 198 [2021-11-25 20:37:38,412 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 20:37:38,421 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 20:37:38,427 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:38,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 80 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:37:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 20:37:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2021-11-25 20:37:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.5294117647058822) internal successors, (156), 102 states have internal predecessors, (156), 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 20:37:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 156 transitions. [2021-11-25 20:37:38,511 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 156 transitions. Word has length 19 [2021-11-25 20:37:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 156 transitions. [2021-11-25 20:37:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 20:37:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 156 transitions. [2021-11-25 20:37:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:37:38,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:38,517 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] [2021-11-25 20:37:38,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:37:38,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash -205303003, now seen corresponding path program 1 times [2021-11-25 20:37:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455275606] [2021-11-25 20:37:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:38,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:38,630 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 20:37:38,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:38,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455275606] [2021-11-25 20:37:38,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455275606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:38,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:38,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:38,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521776893] [2021-11-25 20:37:38,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:38,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:38,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:38,635 INFO L87 Difference]: Start difference. First operand 103 states and 156 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20:37:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:38,804 INFO L93 Difference]: Finished difference Result 232 states and 356 transitions. [2021-11-25 20:37:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20 [2021-11-25 20:37:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:38,813 INFO L225 Difference]: With dead ends: 232 [2021-11-25 20:37:38,813 INFO L226 Difference]: Without dead ends: 130 [2021-11-25 20:37:38,818 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 20:37:38,821 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 54 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-25 20:37:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-11-25 20:37:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5725806451612903) internal successors, (195), 124 states have internal predecessors, (195), 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 20:37:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 195 transitions. [2021-11-25 20:37:38,867 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 195 transitions. Word has length 20 [2021-11-25 20:37:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:38,868 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 195 transitions. [2021-11-25 20:37:38,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20:37:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 195 transitions. [2021-11-25 20:37:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 20:37:38,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:38,871 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:37:38,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:37:38,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1194194565, now seen corresponding path program 1 times [2021-11-25 20:37:38,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834987888] [2021-11-25 20:37:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:38,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:38,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834987888] [2021-11-25 20:37:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834987888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:38,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:38,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147176267] [2021-11-25 20:37:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:38,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:38,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:38,983 INFO L87 Difference]: Start difference. First operand 125 states and 195 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 20:37:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:39,146 INFO L93 Difference]: Finished difference Result 270 states and 425 transitions. [2021-11-25 20:37:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-25 20:37:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:39,150 INFO L225 Difference]: With dead ends: 270 [2021-11-25 20:37:39,150 INFO L226 Difference]: Without dead ends: 146 [2021-11-25 20:37:39,154 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 20:37:39,164 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:39,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 50 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-25 20:37:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-11-25 20:37:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5874125874125875) internal successors, (227), 143 states have internal predecessors, (227), 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 20:37:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 227 transitions. [2021-11-25 20:37:39,182 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 227 transitions. Word has length 37 [2021-11-25 20:37:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:39,183 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 227 transitions. [2021-11-25 20:37:39,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 20:37:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 227 transitions. [2021-11-25 20:37:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 20:37:39,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:39,186 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:37:39,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:37:39,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash -25042794, now seen corresponding path program 1 times [2021-11-25 20:37:39,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:39,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451905319] [2021-11-25 20:37:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:39,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:39,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:39,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451905319] [2021-11-25 20:37:39,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451905319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:39,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:39,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:39,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311900170] [2021-11-25 20:37:39,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:39,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:39,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:39,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:39,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:39,269 INFO L87 Difference]: Start difference. First operand 144 states and 227 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 20:37:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:39,432 INFO L93 Difference]: Finished difference Result 289 states and 455 transitions. [2021-11-25 20:37:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2021-11-25 20:37:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:39,434 INFO L225 Difference]: With dead ends: 289 [2021-11-25 20:37:39,434 INFO L226 Difference]: Without dead ends: 146 [2021-11-25 20:37:39,436 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 20:37:39,445 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 50 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-25 20:37:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2021-11-25 20:37:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5734265734265733) internal successors, (225), 143 states have internal predecessors, (225), 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 20:37:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 225 transitions. [2021-11-25 20:37:39,474 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 225 transitions. Word has length 38 [2021-11-25 20:37:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:39,475 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 225 transitions. [2021-11-25 20:37:39,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 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 20:37:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 225 transitions. [2021-11-25 20:37:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:37:39,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:39,478 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:37:39,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:37:39,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:39,479 INFO L85 PathProgramCache]: Analyzing trace with hash 949801602, now seen corresponding path program 1 times [2021-11-25 20:37:39,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:39,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593593141] [2021-11-25 20:37:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:39,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:37:39,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:39,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593593141] [2021-11-25 20:37:39,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593593141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:39,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:39,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:39,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176456770] [2021-11-25 20:37:39,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:39,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:39,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:39,556 INFO L87 Difference]: Start difference. First operand 144 states and 225 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 20:37:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:39,712 INFO L93 Difference]: Finished difference Result 308 states and 484 transitions. [2021-11-25 20:37:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 53 [2021-11-25 20:37:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:39,714 INFO L225 Difference]: With dead ends: 308 [2021-11-25 20:37:39,714 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 20:37:39,716 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 20:37:39,720 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 91 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:39,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 20:37:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-11-25 20:37:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.575) internal successors, (252), 160 states have internal predecessors, (252), 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 20:37:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2021-11-25 20:37:39,747 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 53 [2021-11-25 20:37:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:39,747 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2021-11-25 20:37:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 20:37:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2021-11-25 20:37:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:37:39,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:39,762 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:37:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:37:39,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 393080627, now seen corresponding path program 1 times [2021-11-25 20:37:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:39,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138795192] [2021-11-25 20:37:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:39,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:37:39,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138795192] [2021-11-25 20:37:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138795192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:39,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:39,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935202955] [2021-11-25 20:37:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:39,846 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 20:37:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:39,987 INFO L93 Difference]: Finished difference Result 325 states and 508 transitions. [2021-11-25 20:37:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 54 [2021-11-25 20:37:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:39,989 INFO L225 Difference]: With dead ends: 325 [2021-11-25 20:37:39,989 INFO L226 Difference]: Without dead ends: 165 [2021-11-25 20:37:39,989 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 20:37:39,990 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:39,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 53 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-25 20:37:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-11-25 20:37:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.55625) internal successors, (249), 160 states have internal predecessors, (249), 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 20:37:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 249 transitions. [2021-11-25 20:37:39,999 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 249 transitions. Word has length 54 [2021-11-25 20:37:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:40,000 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 249 transitions. [2021-11-25 20:37:40,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 20:37:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 249 transitions. [2021-11-25 20:37:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:37:40,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:40,002 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:37:40,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:37:40,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1265329827, now seen corresponding path program 1 times [2021-11-25 20:37:40,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544065228] [2021-11-25 20:37:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:40,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:40,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544065228] [2021-11-25 20:37:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544065228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:40,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:40,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:40,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054896082] [2021-11-25 20:37:40,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:40,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:40,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:40,060 INFO L87 Difference]: Start difference. First operand 161 states and 249 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 20:37:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:40,246 INFO L93 Difference]: Finished difference Result 360 states and 564 transitions. [2021-11-25 20:37:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-25 20:37:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:40,249 INFO L225 Difference]: With dead ends: 360 [2021-11-25 20:37:40,249 INFO L226 Difference]: Without dead ends: 199 [2021-11-25 20:37:40,249 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 20:37:40,251 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:40,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 55 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:37:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-25 20:37:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-11-25 20:37:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.5858585858585859) internal successors, (314), 198 states have internal predecessors, (314), 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 20:37:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 314 transitions. [2021-11-25 20:37:40,262 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 314 transitions. Word has length 56 [2021-11-25 20:37:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:40,264 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 314 transitions. [2021-11-25 20:37:40,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 20:37:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 314 transitions. [2021-11-25 20:37:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:37:40,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:40,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:40,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:37:40,267 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -976626426, now seen corresponding path program 1 times [2021-11-25 20:37:40,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:40,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988554731] [2021-11-25 20:37:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:40,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:37:40,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:40,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988554731] [2021-11-25 20:37:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988554731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:40,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:40,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:40,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733436595] [2021-11-25 20:37:40,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:40,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:40,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:40,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:40,362 INFO L87 Difference]: Start difference. First operand 199 states and 314 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 20:37:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:40,492 INFO L93 Difference]: Finished difference Result 414 states and 655 transitions. [2021-11-25 20:37:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 66 [2021-11-25 20:37:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:40,501 INFO L225 Difference]: With dead ends: 414 [2021-11-25 20:37:40,501 INFO L226 Difference]: Without dead ends: 216 [2021-11-25 20:37:40,502 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 20:37:40,503 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:40,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-25 20:37:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2021-11-25 20:37:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.5727699530516432) internal successors, (335), 213 states have internal predecessors, (335), 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 20:37:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 335 transitions. [2021-11-25 20:37:40,518 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 335 transitions. Word has length 66 [2021-11-25 20:37:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 335 transitions. [2021-11-25 20:37:40,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 20:37:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 335 transitions. [2021-11-25 20:37:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:37:40,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:40,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:40,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:37:40,522 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash -632725675, now seen corresponding path program 1 times [2021-11-25 20:37:40,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:40,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74013024] [2021-11-25 20:37:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:40,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:37:40,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:40,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74013024] [2021-11-25 20:37:40,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74013024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:40,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:40,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:40,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87752823] [2021-11-25 20:37:40,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:40,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:40,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:40,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:40,606 INFO L87 Difference]: Start difference. First operand 214 states and 335 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 20:37:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:40,750 INFO L93 Difference]: Finished difference Result 429 states and 671 transitions. [2021-11-25 20:37:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 67 [2021-11-25 20:37:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:40,753 INFO L225 Difference]: With dead ends: 429 [2021-11-25 20:37:40,753 INFO L226 Difference]: Without dead ends: 216 [2021-11-25 20:37:40,754 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 20:37:40,755 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:40,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 50 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-25 20:37:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2021-11-25 20:37:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.5492957746478873) internal successors, (330), 213 states have internal predecessors, (330), 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 20:37:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 330 transitions. [2021-11-25 20:37:40,767 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 330 transitions. Word has length 67 [2021-11-25 20:37:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:40,768 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 330 transitions. [2021-11-25 20:37:40,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 20:37:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 330 transitions. [2021-11-25 20:37:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:37:40,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:40,770 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2021-11-25 20:37:40,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:37:40,770 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2025401346, now seen corresponding path program 1 times [2021-11-25 20:37:40,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474051374] [2021-11-25 20:37:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:37:40,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474051374] [2021-11-25 20:37:40,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474051374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:40,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:40,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:40,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396999206] [2021-11-25 20:37:40,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:40,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:40,821 INFO L87 Difference]: Start difference. First operand 214 states and 330 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 20:37:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:40,949 INFO L93 Difference]: Finished difference Result 442 states and 683 transitions. [2021-11-25 20:37:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 77 [2021-11-25 20:37:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:40,952 INFO L225 Difference]: With dead ends: 442 [2021-11-25 20:37:40,953 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 20:37:40,953 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 20:37:40,955 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 95 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:40,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 58 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 20:37:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-11-25 20:37:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5309734513274336) internal successors, (346), 226 states have internal predecessors, (346), 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 20:37:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 346 transitions. [2021-11-25 20:37:40,969 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 346 transitions. Word has length 77 [2021-11-25 20:37:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:40,969 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 346 transitions. [2021-11-25 20:37:40,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 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 20:37:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 346 transitions. [2021-11-25 20:37:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:37:40,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:40,971 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 20:37:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:37:40,972 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash -831103249, now seen corresponding path program 1 times [2021-11-25 20:37:40,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211760955] [2021-11-25 20:37:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:40,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:37:41,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211760955] [2021-11-25 20:37:41,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211760955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:41,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:41,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:41,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433752527] [2021-11-25 20:37:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:41,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:41,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:41,013 INFO L87 Difference]: Start difference. First operand 227 states and 346 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 20:37:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:41,133 INFO L93 Difference]: Finished difference Result 455 states and 693 transitions. [2021-11-25 20:37:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 78 [2021-11-25 20:37:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:41,135 INFO L225 Difference]: With dead ends: 455 [2021-11-25 20:37:41,136 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 20:37:41,136 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 20:37:41,137 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:41,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 50 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 20:37:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-11-25 20:37:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5044247787610618) internal successors, (340), 226 states have internal predecessors, (340), 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 20:37:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 340 transitions. [2021-11-25 20:37:41,150 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 340 transitions. Word has length 78 [2021-11-25 20:37:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:41,151 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 340 transitions. [2021-11-25 20:37:41,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 20:37:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 340 transitions. [2021-11-25 20:37:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:37:41,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:41,153 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 20:37:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:37:41,153 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 404735694, now seen corresponding path program 1 times [2021-11-25 20:37:41,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646432628] [2021-11-25 20:37:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:41,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-25 20:37:41,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:41,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646432628] [2021-11-25 20:37:41,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646432628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:41,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559106176] [2021-11-25 20:37:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:41,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:41,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:41,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:41,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:37:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:37:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-25 20:37:41,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:37:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 20:37:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559106176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:37:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745783727] [2021-11-25 20:37:42,314 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-25 20:37:42,314 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:37:42,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:37:42,328 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:37:42,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:38:06,189 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:38:28,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7133#(and (= 4432 |ULTIMATE.start_ssl3_connect_~s__state~0#1|) (= |ULTIMATE.start_ssl3_connect_~tmp___0~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~tmp___4~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___7~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher~0#1|)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___3~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___2~0#1| 2147483648)) (<= 0 (+ 2147483647 |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_renegotiate~0#1|)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression__id~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___1~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_hit~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~s__s3__flags~0#1| 2147483647) (= |ULTIMATE.start_ssl3_connect_~s__type~0#1| 4096) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___5~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~tmp___2~0#1| 2147483647) (<= 0 (+ 2147483647 |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect~0#1|)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___4~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_good~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_good~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~num1~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__bbio~0#1| 2147483648)) (<= (+ |ULTIMATE.start_ssl3_connect_~s__version~0#1| 64512) 0) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect~0#1| 2147483648) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__cert_req~0#1| 2147483647) (<= 0 |ULTIMATE.start_ssl3_connect_~__cil_tmp57~0#1|) (<= |ULTIMATE.start_ssl3_connect_~s__in_handshake~0#1| 2147483648) (<= |ULTIMATE.start_ssl3_connect_~s__info_callback~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~cb~0#1| 2147483647) (= |ULTIMATE.start_ssl3_connect_~s__new_session~0#1| 1) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___9~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_connect_~__cil_tmp56~0#1.base| 0) (= 5 |ULTIMATE.start_ssl3_connect_~blastFlag~0#1|) (<= |ULTIMATE.start_ssl3_connect_~tmp___1~0#1| 2147483647) (= 12292 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_ssl3_connect_~__cil_tmp55~0#1| 768) (<= |ULTIMATE.start_ssl3_connect_~tmp___9~0#1| 2147483647) (= |ULTIMATE.start_ssl3_connect_~s__init_num~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~s__bbio~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__flags~0#1| 2147483648)) (<= 4368 |ULTIMATE.start_ssl3_connect_~state~0#1|) (<= |ULTIMATE.start_ssl3_connect_#in~initial_state#1| 12292) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~cb~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_connect_~s__server~0#1| 0) (= |ULTIMATE.start_ssl3_connect_~skip~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_hit~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_renegotiate~0#1| 2147483648) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_connect_~s__init_buf___0~0#1| 1) (= 12292 |ULTIMATE.start_ssl3_connect_~initial_state#1|) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__version~0#1| 64512)) (<= |ULTIMATE.start_ssl3_connect_~ret~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__wbio~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__debug~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~num1~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___5~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_connect_~ret~0#1|)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__cert_req~0#1| 2147483648)) (<= 1 |ULTIMATE.start_ssl3_connect_~__cil_tmp58~0#1|) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__info_callback~0#1| 2147483648)) (<= 0 (+ 2147483647 |ULTIMATE.start_ssl3_connect_~s__in_handshake~0#1|)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression__id~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__info_callback~0#1| 2147483647) (= |ULTIMATE.start_ssl3_connect_~__cil_tmp56~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___8~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__hit~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~__cil_tmp58~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_ssl3_connect_~s__wbio~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~__cil_tmp57~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~tmp___3~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___6~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___8~0#1| 2147483647) (<= 12292 |ULTIMATE.start_ssl3_connect_#in~initial_state#1|) (= |#NULL.base| 0) (<= |ULTIMATE.start_ssl3_connect_~s__debug~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__hit~0#1| 2147483647))' at error location [2021-11-25 20:38:28,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:38:28,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:38:28,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2021-11-25 20:38:28,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191293274] [2021-11-25 20:38:28,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:38:28,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:38:28,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:38:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:38:28,972 INFO L87 Difference]: Start difference. First operand 227 states and 340 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 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 20:38:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:29,277 INFO L93 Difference]: Finished difference Result 1272 states and 1918 transitions. [2021-11-25 20:38:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:38:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 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 86 [2021-11-25 20:38:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:29,288 INFO L225 Difference]: With dead ends: 1272 [2021-11-25 20:38:29,288 INFO L226 Difference]: Without dead ends: 1270 [2021-11-25 20:38:29,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:38:29,291 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 647 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:29,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1101 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:38:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-11-25 20:38:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1266. [2021-11-25 20:38:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.508300395256917) internal successors, (1908), 1265 states have internal predecessors, (1908), 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 20:38:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1908 transitions. [2021-11-25 20:38:29,339 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1908 transitions. Word has length 86 [2021-11-25 20:38:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:29,340 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1908 transitions. [2021-11-25 20:38:29,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 6 states have internal predecessors, (109), 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 20:38:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1908 transitions. [2021-11-25 20:38:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 20:38:29,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:29,345 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2021-11-25 20:38:29,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:38:29,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:38:29,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 722054708, now seen corresponding path program 1 times [2021-11-25 20:38:29,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:29,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093781256] [2021-11-25 20:38:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:29,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-25 20:38:29,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093781256] [2021-11-25 20:38:29,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093781256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:29,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:29,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226567767] [2021-11-25 20:38:29,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:29,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:29,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:29,632 INFO L87 Difference]: Start difference. First operand 1266 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 20:38:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:29,807 INFO L93 Difference]: Finished difference Result 2649 states and 4023 transitions. [2021-11-25 20:38:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 154 [2021-11-25 20:38:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:29,815 INFO L225 Difference]: With dead ends: 2649 [2021-11-25 20:38:29,815 INFO L226 Difference]: Without dead ends: 1234 [2021-11-25 20:38:29,817 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 20:38:29,818 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:29,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 124 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:38:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-11-25 20:38:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1077. [2021-11-25 20:38:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.404275092936803) internal successors, (1511), 1076 states have internal predecessors, (1511), 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 20:38:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1511 transitions. [2021-11-25 20:38:29,860 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1511 transitions. Word has length 154 [2021-11-25 20:38:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:29,862 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1511 transitions. [2021-11-25 20:38:29,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 20:38:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1511 transitions. [2021-11-25 20:38:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 20:38:29,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:29,868 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:38:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:38:29,869 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -645767064, now seen corresponding path program 1 times [2021-11-25 20:38:29,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463718517] [2021-11-25 20:38:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:29,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-25 20:38:29,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463718517] [2021-11-25 20:38:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463718517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:29,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:29,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:29,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899801182] [2021-11-25 20:38:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:29,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:29,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:29,931 INFO L87 Difference]: Start difference. First operand 1077 states and 1511 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 20:38:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:30,087 INFO L93 Difference]: Finished difference Result 2161 states and 3064 transitions. [2021-11-25 20:38:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 156 [2021-11-25 20:38:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:30,095 INFO L225 Difference]: With dead ends: 2161 [2021-11-25 20:38:30,095 INFO L226 Difference]: Without dead ends: 1288 [2021-11-25 20:38:30,097 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 20:38:30,098 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 73 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:30,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 88 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:38:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-11-25 20:38:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1137. [2021-11-25 20:38:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.4022887323943662) internal successors, (1593), 1136 states have internal predecessors, (1593), 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 20:38:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1593 transitions. [2021-11-25 20:38:30,140 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1593 transitions. Word has length 156 [2021-11-25 20:38:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:30,142 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1593 transitions. [2021-11-25 20:38:30,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 20:38:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1593 transitions. [2021-11-25 20:38:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-25 20:38:30,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:30,147 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2021-11-25 20:38:30,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:38:30,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -631112443, now seen corresponding path program 1 times [2021-11-25 20:38:30,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761090268] [2021-11-25 20:38:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:30,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-25 20:38:30,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:30,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761090268] [2021-11-25 20:38:30,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761090268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:30,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:30,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:30,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996221919] [2021-11-25 20:38:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:30,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:30,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:30,211 INFO L87 Difference]: Start difference. First operand 1137 states and 1593 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 20:38:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:30,371 INFO L93 Difference]: Finished difference Result 2461 states and 3460 transitions. [2021-11-25 20:38:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 174 [2021-11-25 20:38:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:30,379 INFO L225 Difference]: With dead ends: 2461 [2021-11-25 20:38:30,379 INFO L226 Difference]: Without dead ends: 1265 [2021-11-25 20:38:30,384 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 20:38:30,385 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 67 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:30,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 118 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:38:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-11-25 20:38:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1229. [2021-11-25 20:38:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 1.3819218241042346) internal successors, (1697), 1228 states have internal predecessors, (1697), 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 20:38:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1697 transitions. [2021-11-25 20:38:30,429 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1697 transitions. Word has length 174 [2021-11-25 20:38:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:30,430 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 1697 transitions. [2021-11-25 20:38:30,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 20:38:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1697 transitions. [2021-11-25 20:38:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 20:38:30,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:30,435 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 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] [2021-11-25 20:38:30,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:38:30,435 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:30,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1056666864, now seen corresponding path program 1 times [2021-11-25 20:38:30,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:30,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503942001] [2021-11-25 20:38:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:30,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-25 20:38:30,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503942001] [2021-11-25 20:38:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503942001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:30,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:30,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:30,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915053548] [2021-11-25 20:38:30,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:30,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:30,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:30,516 INFO L87 Difference]: Start difference. First operand 1229 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 20:38:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:30,688 INFO L93 Difference]: Finished difference Result 2683 states and 3727 transitions. [2021-11-25 20:38:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 195 [2021-11-25 20:38:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:30,697 INFO L225 Difference]: With dead ends: 2683 [2021-11-25 20:38:30,697 INFO L226 Difference]: Without dead ends: 1410 [2021-11-25 20:38:30,699 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 20:38:30,700 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:30,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:38:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-11-25 20:38:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1374. [2021-11-25 20:38:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.3743627093954844) internal successors, (1887), 1373 states have internal predecessors, (1887), 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 20:38:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1887 transitions. [2021-11-25 20:38:30,753 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1887 transitions. Word has length 195 [2021-11-25 20:38:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:30,754 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 1887 transitions. [2021-11-25 20:38:30,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 20:38:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1887 transitions. [2021-11-25 20:38:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-25 20:38:30,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:30,761 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2021-11-25 20:38:30,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:38:30,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:30,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1102081419, now seen corresponding path program 1 times [2021-11-25 20:38:30,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:30,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358361488] [2021-11-25 20:38:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:30,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-11-25 20:38:30,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358361488] [2021-11-25 20:38:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358361488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:30,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:30,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:30,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649956069] [2021-11-25 20:38:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:30,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:30,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:30,846 INFO L87 Difference]: Start difference. First operand 1374 states and 1887 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 20:38:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:31,066 INFO L93 Difference]: Finished difference Result 2973 states and 4107 transitions. [2021-11-25 20:38:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 222 [2021-11-25 20:38:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:31,077 INFO L225 Difference]: With dead ends: 2973 [2021-11-25 20:38:31,077 INFO L226 Difference]: Without dead ends: 1575 [2021-11-25 20:38:31,079 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 20:38:31,080 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 71 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:31,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 114 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:38:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-25 20:38:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1539. [2021-11-25 20:38:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.3667100130039012) internal successors, (2102), 1538 states have internal predecessors, (2102), 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 20:38:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2102 transitions. [2021-11-25 20:38:31,147 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2102 transitions. Word has length 222 [2021-11-25 20:38:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:31,148 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 2102 transitions. [2021-11-25 20:38:31,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 20:38:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2102 transitions. [2021-11-25 20:38:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-25 20:38:31,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:31,155 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:38:31,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:38:31,155 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -362863948, now seen corresponding path program 1 times [2021-11-25 20:38:31,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028602003] [2021-11-25 20:38:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:31,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-25 20:38:31,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028602003] [2021-11-25 20:38:31,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028602003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:31,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:31,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:31,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295638046] [2021-11-25 20:38:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:31,237 INFO L87 Difference]: Start difference. First operand 1539 states and 2102 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 20:38:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:31,447 INFO L93 Difference]: Finished difference Result 3208 states and 4400 transitions. [2021-11-25 20:38:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 255 [2021-11-25 20:38:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:31,459 INFO L225 Difference]: With dead ends: 3208 [2021-11-25 20:38:31,459 INFO L226 Difference]: Without dead ends: 1655 [2021-11-25 20:38:31,462 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 20:38:31,463 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 72 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:31,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 111 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:38:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-11-25 20:38:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1619. [2021-11-25 20:38:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 1.368974042027194) internal successors, (2215), 1618 states have internal predecessors, (2215), 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 20:38:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2215 transitions. [2021-11-25 20:38:31,542 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2215 transitions. Word has length 255 [2021-11-25 20:38:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 2215 transitions. [2021-11-25 20:38:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 20:38:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2215 transitions. [2021-11-25 20:38:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-25 20:38:31,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:31,554 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2021-11-25 20:38:31,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:38:31,555 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:38:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1115949455, now seen corresponding path program 1 times [2021-11-25 20:38:31,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501564185] [2021-11-25 20:38:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:31,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 848 proven. 42 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-25 20:38:31,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:31,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501564185] [2021-11-25 20:38:31,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501564185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:38:31,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74794185] [2021-11-25 20:38:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:31,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:38:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:38:31,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:38:31,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d66ec12-de54-4815-b30d-362d234c5c04/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:38:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:38:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:38:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 681 proven. 1 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-11-25 20:38:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:38:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 681 proven. 1 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-11-25 20:38:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74794185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:38:33,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630053915] [2021-11-25 20:38:33,439 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2021-11-25 20:38:33,440 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:38:33,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:38:33,441 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:38:33,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs