./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.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_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/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_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/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_2975d86e-ca28-498c-b023-6b5c81fe6c71/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 46dd66c9a206199cd5bc220ec6fbc33cff9c3bf85e99aafe68b123163a041adf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:23:49,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:23:49,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:23:50,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:23:50,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:23:50,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:23:50,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:23:50,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:23:50,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:23:50,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:23:50,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:23:50,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:23:50,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:23:50,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:23:50,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:23:50,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:23:50,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:23:50,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:23:50,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:23:50,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:23:50,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:23:50,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:23:50,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:23:50,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:23:50,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:23:50,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:23:50,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:23:50,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:23:50,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:23:50,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:23:50,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:23:50,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:23:50,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:23:50,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:23:50,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:23:50,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:23:50,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:23:50,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:23:50,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:23:50,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:23:50,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:23:50,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:23:50,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:23:50,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:23:50,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:23:50,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:23:50,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:23:50,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:23:50,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:23:50,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:23:50,171 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:23:50,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:23:50,173 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:23:50,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:23:50,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:23:50,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:23:50,174 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:23:50,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:23:50,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:23:50,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:23:50,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:23:50,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:23:50,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:23:50,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:23:50,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:23:50,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:23:50,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:23:50,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:23:50,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:23:50,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:23:50,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:23:50,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:23:50,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:23:50,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:23:50,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:50,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:23:50,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:23:50,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:23:50,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:23:50,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:23:50,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:23:50,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:23:50,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:23:50,180 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_2975d86e-ca28-498c-b023-6b5c81fe6c71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46dd66c9a206199cd5bc220ec6fbc33cff9c3bf85e99aafe68b123163a041adf [2021-11-25 19:23:50,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:23:50,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:23:50,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:23:50,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:23:50,541 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:23:50,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c [2021-11-25 19:23:50,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/data/33ecb807a/d415cb2df9964c12b4cd9b4d008fe28f/FLAG40c394a2c [2021-11-25 19:23:51,493 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:23:51,493 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c [2021-11-25 19:23:51,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/data/33ecb807a/d415cb2df9964c12b4cd9b4d008fe28f/FLAG40c394a2c [2021-11-25 19:23:51,636 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/data/33ecb807a/d415cb2df9964c12b4cd9b4d008fe28f [2021-11-25 19:23:51,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:23:51,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:23:51,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:51,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:23:51,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:23:51,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:51" (1/1) ... [2021-11-25 19:23:51,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a34c892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:51, skipping insertion in model container [2021-11-25 19:23:51,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:51" (1/1) ... [2021-11-25 19:23:51,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:23:51,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:23:52,319 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_2975d86e-ca28-498c-b023-6b5c81fe6c71/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c[65405,65418] [2021-11-25 19:23:52,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:52,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:23:52,518 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_2975d86e-ca28-498c-b023-6b5c81fe6c71/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c[65405,65418] [2021-11-25 19:23:52,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:52,557 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:23:52,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52 WrapperNode [2021-11-25 19:23:52,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:52,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:52,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:23:52,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:23:52,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,703 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-11-25 19:23:52,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:52,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:23:52,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:23:52,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:23:52,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:23:52,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:23:52,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:23:52,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:23:52,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (1/1) ... [2021-11-25 19:23:52,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:52,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:23:52,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:23:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:23:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:23:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:23:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:23:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:23:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:23:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:23:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:23:52,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:23:53,204 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:23:53,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:23:53,240 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:23:56,439 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-25 19:23:56,440 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-25 19:23:56,440 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:23:56,895 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:23:56,895 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:23:56,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:56 BoogieIcfgContainer [2021-11-25 19:23:56,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:23:56,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:23:56,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:23:56,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:23:56,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:23:51" (1/3) ... [2021-11-25 19:23:56,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5dd537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:56, skipping insertion in model container [2021-11-25 19:23:56,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:52" (2/3) ... [2021-11-25 19:23:56,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5dd537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:56, skipping insertion in model container [2021-11-25 19:23:56,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:56" (3/3) ... [2021-11-25 19:23:56,908 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.04.i.cil-2.c [2021-11-25 19:23:56,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:23:56,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:23:56,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:23:57,015 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 19:23:57,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:23:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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 19:23:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:23:57,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:57,052 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 19:23:57,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1858607809, now seen corresponding path program 1 times [2021-11-25 19:23:57,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:57,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146018976] [2021-11-25 19:23:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:57,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:58,167 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 19:23:58,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:58,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146018976] [2021-11-25 19:23:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146018976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:58,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:58,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:23:58,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298880318] [2021-11-25 19:23:58,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:58,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:23:58,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:23:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:23:58,232 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 1.75) internal successors, (147), 85 states have internal predecessors, (147), 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 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 19:24:00,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:01,823 INFO L93 Difference]: Finished difference Result 253 states and 433 transitions. [2021-11-25 19:24:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 19:24:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:01,846 INFO L225 Difference]: With dead ends: 253 [2021-11-25 19:24:01,846 INFO L226 Difference]: Without dead ends: 162 [2021-11-25 19:24:01,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:24:01,863 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 99 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:01,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 242 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 179 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:24:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-25 19:24:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2021-11-25 19:24:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 104 states have internal predecessors, (158), 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 19:24:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2021-11-25 19:24:01,935 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 158 transitions. Word has length 19 [2021-11-25 19:24:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:01,936 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 158 transitions. [2021-11-25 19:24:01,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 19:24:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 158 transitions. [2021-11-25 19:24:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:24:01,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:01,938 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 19:24:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:24:01,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1786953060, now seen corresponding path program 1 times [2021-11-25 19:24:01,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:01,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751516584] [2021-11-25 19:24:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:01,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:02,403 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 19:24:02,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:02,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751516584] [2021-11-25 19:24:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751516584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:02,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:02,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:24:02,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95065102] [2021-11-25 19:24:02,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:02,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:02,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:02,409 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 19:24:04,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:05,193 INFO L93 Difference]: Finished difference Result 211 states and 318 transitions. [2021-11-25 19:24:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 19:24:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:05,196 INFO L225 Difference]: With dead ends: 211 [2021-11-25 19:24:05,196 INFO L226 Difference]: Without dead ends: 107 [2021-11-25 19:24:05,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:24:05,199 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:05,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 266 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:24:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-25 19:24:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-25 19:24:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 106 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 160 transitions. [2021-11-25 19:24:05,220 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 160 transitions. Word has length 20 [2021-11-25 19:24:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:05,220 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 160 transitions. [2021-11-25 19:24:05,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 19:24:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 160 transitions. [2021-11-25 19:24:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 19:24:05,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:05,223 INFO L514 BasicCegarLoop]: trace histogram [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 19:24:05,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:24:05,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:05,224 INFO L85 PathProgramCache]: Analyzing trace with hash 386162939, now seen corresponding path program 1 times [2021-11-25 19:24:05,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:05,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490822869] [2021-11-25 19:24:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:05,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:24:05,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:05,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490822869] [2021-11-25 19:24:05,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490822869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:05,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:05,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:24:05,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493399889] [2021-11-25 19:24:05,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:05,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:24:05,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:05,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:24:05,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:24:05,671 INFO L87 Difference]: Start difference. First operand 107 states and 160 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 19:24:07,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:08,147 INFO L93 Difference]: Finished difference Result 210 states and 316 transitions. [2021-11-25 19:24:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:24:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 30 [2021-11-25 19:24:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:08,150 INFO L225 Difference]: With dead ends: 210 [2021-11-25 19:24:08,151 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 19:24:08,151 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 19:24:08,153 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 86 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:08,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 205 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:24:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 19:24:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-25 19:24:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5194174757281553) internal successors, (313), 206 states have internal predecessors, (313), 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 19:24:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 313 transitions. [2021-11-25 19:24:08,175 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 313 transitions. Word has length 30 [2021-11-25 19:24:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:08,176 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 313 transitions. [2021-11-25 19:24:08,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 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 19:24:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 313 transitions. [2021-11-25 19:24:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 19:24:08,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:08,180 INFO L514 BasicCegarLoop]: trace histogram [3, 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 19:24:08,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:24:08,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1744949474, now seen corresponding path program 1 times [2021-11-25 19:24:08,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:08,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487921761] [2021-11-25 19:24:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:08,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:24:08,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:08,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487921761] [2021-11-25 19:24:08,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487921761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:24:08,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:24:08,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:24:08,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012453895] [2021-11-25 19:24:08,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:24:08,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:24:08,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:24:08,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:24:08,520 INFO L87 Difference]: Start difference. First operand 207 states and 313 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 19:24:10,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:24:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:11,467 INFO L93 Difference]: Finished difference Result 338 states and 509 transitions. [2021-11-25 19:24:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:24:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 42 [2021-11-25 19:24:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:11,488 INFO L225 Difference]: With dead ends: 338 [2021-11-25 19:24:11,489 INFO L226 Difference]: Without dead ends: 234 [2021-11-25 19:24:11,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:24:11,496 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:11,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 298 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:24:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-25 19:24:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2021-11-25 19:24:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.527027027027027) internal successors, (339), 222 states have internal predecessors, (339), 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 19:24:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 339 transitions. [2021-11-25 19:24:11,522 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 339 transitions. Word has length 42 [2021-11-25 19:24:11,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:11,522 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 339 transitions. [2021-11-25 19:24:11,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 19:24:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 339 transitions. [2021-11-25 19:24:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:24:11,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:11,537 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-11-25 19:24:11,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:24:11,538 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1785795325, now seen corresponding path program 2 times [2021-11-25 19:24:11,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858344510] [2021-11-25 19:24:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:11,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:24:11,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:11,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858344510] [2021-11-25 19:24:11,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858344510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:11,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863489100] [2021-11-25 19:24:11,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:24:11,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:11,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:11,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:11,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:25:01,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:25:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:25:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:25:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:25:01,451 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-25 19:25:01,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-25 19:25:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 159 [2021-11-25 19:25:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 111 [2021-11-25 19:25:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:02,030 INFO L354 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2021-11-25 19:25:02,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-11-25 19:25:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:02,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-11-25 19:25:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:02,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:25:02,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2021-11-25 19:25:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:25:02,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:25:02,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863489100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:02,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:25:02,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 19:25:02,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860845498] [2021-11-25 19:25:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:02,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:02,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:25:02,508 INFO L87 Difference]: Start difference. First operand 223 states and 339 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 19:25:04,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:05,446 INFO L93 Difference]: Finished difference Result 589 states and 893 transitions. [2021-11-25 19:25:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 52 [2021-11-25 19:25:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:05,451 INFO L225 Difference]: With dead ends: 589 [2021-11-25 19:25:05,451 INFO L226 Difference]: Without dead ends: 369 [2021-11-25 19:25:05,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:25:05,453 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:05,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 192 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:25:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-25 19:25:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 269. [2021-11-25 19:25:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5559701492537314) internal successors, (417), 268 states have internal predecessors, (417), 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 19:25:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 417 transitions. [2021-11-25 19:25:05,476 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 417 transitions. Word has length 52 [2021-11-25 19:25:05,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:05,477 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 417 transitions. [2021-11-25 19:25:05,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 19:25:05,477 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 417 transitions. [2021-11-25 19:25:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:25:05,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:05,481 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:05,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:25:05,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:05,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1829503289, now seen corresponding path program 1 times [2021-11-25 19:25:05,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324353512] [2021-11-25 19:25:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:05,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:25:06,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324353512] [2021-11-25 19:25:06,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324353512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:25:06,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505406388] [2021-11-25 19:25:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:06,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:06,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:25:06,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:25:06,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:25:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:07,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:25:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:25:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:25:07,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:25:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 19:25:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505406388] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:25:07,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:25:07,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-25 19:25:07,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872466194] [2021-11-25 19:25:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:07,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:25:07,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:25:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:25:07,413 INFO L87 Difference]: Start difference. First operand 269 states and 417 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 19:25:09,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:10,103 INFO L93 Difference]: Finished difference Result 533 states and 829 transitions. [2021-11-25 19:25:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:25:10,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 19:25:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:10,109 INFO L225 Difference]: With dead ends: 533 [2021-11-25 19:25:10,109 INFO L226 Difference]: Without dead ends: 531 [2021-11-25 19:25:10,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:25:10,111 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 82 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:10,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 205 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:25:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-25 19:25:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-25 19:25:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.560377358490566) internal successors, (827), 530 states have internal predecessors, (827), 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 19:25:10,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 827 transitions. [2021-11-25 19:25:10,140 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 827 transitions. Word has length 56 [2021-11-25 19:25:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:10,141 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 827 transitions. [2021-11-25 19:25:10,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 19:25:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 827 transitions. [2021-11-25 19:25:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 19:25:10,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:10,149 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-25 19:25:10,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:25:10,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:10,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1332143990, now seen corresponding path program 1 times [2021-11-25 19:25:10,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:10,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386807937] [2021-11-25 19:25:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:10,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:25:10,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:10,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386807937] [2021-11-25 19:25:10,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386807937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:10,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:10,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350885083] [2021-11-25 19:25:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:10,756 INFO L87 Difference]: Start difference. First operand 531 states and 827 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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 19:25:12,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:13,851 INFO L93 Difference]: Finished difference Result 836 states and 1292 transitions. [2021-11-25 19:25:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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 70 [2021-11-25 19:25:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:13,857 INFO L225 Difference]: With dead ends: 836 [2021-11-25 19:25:13,857 INFO L226 Difference]: Without dead ends: 553 [2021-11-25 19:25:13,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:13,859 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 25 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:13,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 302 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:25:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-25 19:25:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 531. [2021-11-25 19:25:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.5566037735849056) internal successors, (825), 530 states have internal predecessors, (825), 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 19:25:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 825 transitions. [2021-11-25 19:25:13,885 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 825 transitions. Word has length 70 [2021-11-25 19:25:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:13,885 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 825 transitions. [2021-11-25 19:25:13,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 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 19:25:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 825 transitions. [2021-11-25 19:25:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:25:13,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:13,889 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 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 19:25:13,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:25:13,890 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -370855876, now seen corresponding path program 1 times [2021-11-25 19:25:13,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:13,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365924883] [2021-11-25 19:25:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:13,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:25:14,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:14,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365924883] [2021-11-25 19:25:14,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365924883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:14,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:14,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:14,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715899000] [2021-11-25 19:25:14,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:14,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:14,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:14,227 INFO L87 Difference]: Start difference. First operand 531 states and 825 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 19:25:16,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:16,804 INFO L93 Difference]: Finished difference Result 836 states and 1288 transitions. [2021-11-25 19:25:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 71 [2021-11-25 19:25:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:16,810 INFO L225 Difference]: With dead ends: 836 [2021-11-25 19:25:16,810 INFO L226 Difference]: Without dead ends: 553 [2021-11-25 19:25:16,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:16,812 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:16,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 298 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:25:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-25 19:25:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 531. [2021-11-25 19:25:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.5528301886792453) internal successors, (823), 530 states have internal predecessors, (823), 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 19:25:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 823 transitions. [2021-11-25 19:25:16,837 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 823 transitions. Word has length 71 [2021-11-25 19:25:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:16,838 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 823 transitions. [2021-11-25 19:25:16,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 19:25:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 823 transitions. [2021-11-25 19:25:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:25:16,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:16,841 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 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 19:25:16,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:25:16,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:16,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1041423651, now seen corresponding path program 1 times [2021-11-25 19:25:16,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094573567] [2021-11-25 19:25:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:16,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:25:17,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094573567] [2021-11-25 19:25:17,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094573567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:17,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:17,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:17,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345791615] [2021-11-25 19:25:17,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:17,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:17,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:17,180 INFO L87 Difference]: Start difference. First operand 531 states and 823 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:25:19,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:19,933 INFO L93 Difference]: Finished difference Result 1363 states and 2095 transitions. [2021-11-25 19:25:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 72 [2021-11-25 19:25:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:19,941 INFO L225 Difference]: With dead ends: 1363 [2021-11-25 19:25:19,941 INFO L226 Difference]: Without dead ends: 835 [2021-11-25 19:25:19,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:19,944 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 88 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:19,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 189 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:25:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-25 19:25:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 575. [2021-11-25 19:25:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5278745644599303) internal successors, (877), 574 states have internal predecessors, (877), 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 19:25:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 877 transitions. [2021-11-25 19:25:19,976 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 877 transitions. Word has length 72 [2021-11-25 19:25:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:19,977 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 877 transitions. [2021-11-25 19:25:19,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:25:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 877 transitions. [2021-11-25 19:25:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:25:19,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:19,979 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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 19:25:19,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:25:19,980 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1975957385, now seen corresponding path program 1 times [2021-11-25 19:25:19,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:19,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162212191] [2021-11-25 19:25:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:19,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:25:20,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:20,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162212191] [2021-11-25 19:25:20,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162212191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:20,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:20,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:20,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426133757] [2021-11-25 19:25:20,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:20,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:20,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:20,327 INFO L87 Difference]: Start difference. First operand 575 states and 877 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 19:25:22,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:23,425 INFO L93 Difference]: Finished difference Result 902 states and 1364 transitions. [2021-11-25 19:25:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 73 [2021-11-25 19:25:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:23,431 INFO L225 Difference]: With dead ends: 902 [2021-11-25 19:25:23,431 INFO L226 Difference]: Without dead ends: 597 [2021-11-25 19:25:23,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:23,433 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 19 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:23,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 294 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:25:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-25 19:25:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 575. [2021-11-25 19:25:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.524390243902439) internal successors, (875), 574 states have internal predecessors, (875), 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 19:25:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 875 transitions. [2021-11-25 19:25:23,462 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 875 transitions. Word has length 73 [2021-11-25 19:25:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 875 transitions. [2021-11-25 19:25:23,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 19:25:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 875 transitions. [2021-11-25 19:25:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:25:23,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:23,465 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 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 19:25:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:25:23,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1791466040, now seen corresponding path program 1 times [2021-11-25 19:25:23,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:23,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467497938] [2021-11-25 19:25:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:23,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:25:23,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:23,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467497938] [2021-11-25 19:25:23,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467497938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:23,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:23,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:23,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656192792] [2021-11-25 19:25:23,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:23,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:23,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:23,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:23,765 INFO L87 Difference]: Start difference. First operand 575 states and 875 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 19:25:25,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:26,671 INFO L93 Difference]: Finished difference Result 888 states and 1344 transitions. [2021-11-25 19:25:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 74 [2021-11-25 19:25:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:26,677 INFO L225 Difference]: With dead ends: 888 [2021-11-25 19:25:26,677 INFO L226 Difference]: Without dead ends: 583 [2021-11-25 19:25:26,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:26,679 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 13 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:26,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 284 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:25:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-25 19:25:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 575. [2021-11-25 19:25:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5209059233449478) internal successors, (873), 574 states have internal predecessors, (873), 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 19:25:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 873 transitions. [2021-11-25 19:25:26,706 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 873 transitions. Word has length 74 [2021-11-25 19:25:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:26,707 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 873 transitions. [2021-11-25 19:25:26,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 19:25:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 873 transitions. [2021-11-25 19:25:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:25:26,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:26,709 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:26,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:25:26,710 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1685884986, now seen corresponding path program 1 times [2021-11-25 19:25:26,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:26,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955904044] [2021-11-25 19:25:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:26,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 19:25:27,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:27,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955904044] [2021-11-25 19:25:27,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955904044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:25:27,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:25:27,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:25:27,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054999599] [2021-11-25 19:25:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:25:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:25:27,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:25:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:25:27,058 INFO L87 Difference]: Start difference. First operand 575 states and 873 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:25:29,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:25:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:30,224 INFO L93 Difference]: Finished difference Result 1407 states and 2127 transitions. [2021-11-25 19:25:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:25:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 74 [2021-11-25 19:25:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:30,232 INFO L225 Difference]: With dead ends: 1407 [2021-11-25 19:25:30,232 INFO L226 Difference]: Without dead ends: 835 [2021-11-25 19:25:30,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:25:30,234 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 75 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:30,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 175 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 173 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 19:25:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-25 19:25:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 531. [2021-11-25 19:25:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.5339622641509434) internal successors, (813), 530 states have internal predecessors, (813), 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 19:25:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 813 transitions. [2021-11-25 19:25:30,262 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 813 transitions. Word has length 74 [2021-11-25 19:25:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:30,263 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 813 transitions. [2021-11-25 19:25:30,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:25:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 813 transitions. [2021-11-25 19:25:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 19:25:30,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:30,266 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 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, 1] [2021-11-25 19:25:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:25:30,266 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1799700415, now seen corresponding path program 1 times [2021-11-25 19:25:30,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:30,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574401099] [2021-11-25 19:25:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:30,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:25:30,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:30,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574401099] [2021-11-25 19:25:30,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574401099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:25:30,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224010540] [2021-11-25 19:25:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:30,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:30,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:25:30,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:25:30,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2975d86e-ca28-498c-b023-6b5c81fe6c71/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:25:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:25:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:25:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:25:32,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:25:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-25 19:25:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224010540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:25:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791470087] [2021-11-25 19:25:32,789 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2021-11-25 19:25:32,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:25:32,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:25:32,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:25:32,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:25:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:48,391 INFO L244 Elim1Store]: Index analysis took 639 ms