./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan --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 defe4a000b54820195525cab63f7790d3323d50a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:59:35,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:59:35,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:59:35,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:59:35,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:59:35,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:59:35,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:59:35,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:59:35,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:59:35,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:59:35,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:59:35,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:59:35,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:59:35,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:59:35,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:59:35,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:59:35,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:59:35,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:59:35,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:59:35,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:59:35,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:59:35,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:59:35,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:59:35,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:59:35,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:59:35,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:59:35,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:59:35,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:59:35,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:59:35,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:59:35,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:59:35,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:59:35,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:59:35,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:59:35,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:59:35,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:59:35,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:59:35,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:59:35,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:59:35,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:59:35,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:59:35,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:59:35,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:59:35,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:59:35,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:59:35,205 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:59:35,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:59:35,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:59:35,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:59:35,207 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:59:35,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:59:35,207 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:59:35,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:59:35,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:59:35,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:59:35,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:59:35,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:59:35,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:59:35,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:59:35,210 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-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> defe4a000b54820195525cab63f7790d3323d50a [2020-12-09 18:59:35,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:59:35,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:59:35,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:59:35,402 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:59:35,402 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:59:35,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/../../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2020-12-09 18:59:35,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/data/290639632/2270c3f1febb437f8295063f19cf44d7/FLAGf23c2b2a5 [2020-12-09 18:59:35,813 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:59:35,813 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2020-12-09 18:59:35,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/data/290639632/2270c3f1febb437f8295063f19cf44d7/FLAGf23c2b2a5 [2020-12-09 18:59:36,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/data/290639632/2270c3f1febb437f8295063f19cf44d7 [2020-12-09 18:59:36,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:59:36,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:59:36,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:59:36,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:59:36,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:59:36,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92d75bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36, skipping insertion in model container [2020-12-09 18:59:36,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:59:36,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:59:36,413 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43168,43181] [2020-12-09 18:59:36,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:59:36,424 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:59:36,461 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43168,43181] [2020-12-09 18:59:36,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:59:36,473 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:59:36,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36 WrapperNode [2020-12-09 18:59:36,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:59:36,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:59:36,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:59:36,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:59:36,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:59:36,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:59:36,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:59:36,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:59:36,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... [2020-12-09 18:59:36,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:59:36,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:59:36,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:59:36,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:59:36,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:59:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:59:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:59:36,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:59:36,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:59:36,693 WARN L800 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-09 18:59:37,067 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-12-09 18:59:37,068 INFO L752 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-12-09 18:59:37,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:59:37,298 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 18:59:37,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:59:37 BoogieIcfgContainer [2020-12-09 18:59:37,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:59:37,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:59:37,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:59:37,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:59:37,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:59:36" (1/3) ... [2020-12-09 18:59:37,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7037f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:59:37, skipping insertion in model container [2020-12-09 18:59:37,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:59:36" (2/3) ... [2020-12-09 18:59:37,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7037f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:59:37, skipping insertion in model container [2020-12-09 18:59:37,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:59:37" (3/3) ... [2020-12-09 18:59:37,307 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_11.cil.c [2020-12-09 18:59:37,320 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:59:37,323 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:59:37,333 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:59:37,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:59:37,356 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:59:37,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:59:37,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:59:37,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:59:37,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:59:37,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:59:37,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:59:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-12-09 18:59:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 18:59:37,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:37,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:37,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 743379359, now seen corresponding path program 1 times [2020-12-09 18:59:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:37,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609692701] [2020-12-09 18:59:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:37,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609692701] [2020-12-09 18:59:37,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:37,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30921266] [2020-12-09 18:59:37,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:37,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:37,560 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 3 states. [2020-12-09 18:59:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:37,692 INFO L93 Difference]: Finished difference Result 246 states and 430 transitions. [2020-12-09 18:59:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:37,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-09 18:59:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:37,702 INFO L225 Difference]: With dead ends: 246 [2020-12-09 18:59:37,702 INFO L226 Difference]: Without dead ends: 128 [2020-12-09 18:59:37,704 INFO L677 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 [2020-12-09 18:59:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-09 18:59:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-12-09 18:59:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-09 18:59:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 194 transitions. [2020-12-09 18:59:37,737 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 194 transitions. Word has length 19 [2020-12-09 18:59:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:37,737 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 194 transitions. [2020-12-09 18:59:37,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 194 transitions. [2020-12-09 18:59:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 18:59:37,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:37,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:37,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:59:37,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:37,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2091695992, now seen corresponding path program 1 times [2020-12-09 18:59:37,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:37,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200111418] [2020-12-09 18:59:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200111418] [2020-12-09 18:59:37,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:37,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317031709] [2020-12-09 18:59:37,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:37,784 INFO L87 Difference]: Start difference. First operand 128 states and 194 transitions. Second operand 3 states. [2020-12-09 18:59:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:37,881 INFO L93 Difference]: Finished difference Result 263 states and 397 transitions. [2020-12-09 18:59:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:37,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-09 18:59:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:37,883 INFO L225 Difference]: With dead ends: 263 [2020-12-09 18:59:37,883 INFO L226 Difference]: Without dead ends: 137 [2020-12-09 18:59:37,884 INFO L677 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 [2020-12-09 18:59:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-09 18:59:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2020-12-09 18:59:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-09 18:59:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 195 transitions. [2020-12-09 18:59:37,893 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 195 transitions. Word has length 21 [2020-12-09 18:59:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:37,893 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 195 transitions. [2020-12-09 18:59:37,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 195 transitions. [2020-12-09 18:59:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 18:59:37,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:37,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:37,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:59:37,895 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 912304037, now seen corresponding path program 1 times [2020-12-09 18:59:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:37,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349093743] [2020-12-09 18:59:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:37,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349093743] [2020-12-09 18:59:37,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:37,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:37,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118022632] [2020-12-09 18:59:37,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:37,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:37,932 INFO L87 Difference]: Start difference. First operand 129 states and 195 transitions. Second operand 3 states. [2020-12-09 18:59:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,017 INFO L93 Difference]: Finished difference Result 273 states and 414 transitions. [2020-12-09 18:59:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-09 18:59:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,019 INFO L225 Difference]: With dead ends: 273 [2020-12-09 18:59:38,019 INFO L226 Difference]: Without dead ends: 146 [2020-12-09 18:59:38,020 INFO L677 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 [2020-12-09 18:59:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-09 18:59:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-12-09 18:59:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-09 18:59:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 218 transitions. [2020-12-09 18:59:38,028 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 218 transitions. Word has length 21 [2020-12-09 18:59:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,028 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 218 transitions. [2020-12-09 18:59:38,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 218 transitions. [2020-12-09 18:59:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 18:59:38,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:59:38,030 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2095116604, now seen corresponding path program 1 times [2020-12-09 18:59:38,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088121595] [2020-12-09 18:59:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088121595] [2020-12-09 18:59:38,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106486154] [2020-12-09 18:59:38,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,062 INFO L87 Difference]: Start difference. First operand 144 states and 218 transitions. Second operand 3 states. [2020-12-09 18:59:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,149 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2020-12-09 18:59:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-09 18:59:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,150 INFO L225 Difference]: With dead ends: 292 [2020-12-09 18:59:38,150 INFO L226 Difference]: Without dead ends: 150 [2020-12-09 18:59:38,151 INFO L677 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 [2020-12-09 18:59:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-09 18:59:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-09 18:59:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 18:59:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 229 transitions. [2020-12-09 18:59:38,159 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 229 transitions. Word has length 21 [2020-12-09 18:59:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,159 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 229 transitions. [2020-12-09 18:59:38,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 229 transitions. [2020-12-09 18:59:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 18:59:38,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:59:38,160 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1114119307, now seen corresponding path program 1 times [2020-12-09 18:59:38,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163958186] [2020-12-09 18:59:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163958186] [2020-12-09 18:59:38,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922706100] [2020-12-09 18:59:38,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,186 INFO L87 Difference]: Start difference. First operand 150 states and 229 transitions. Second operand 3 states. [2020-12-09 18:59:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,277 INFO L93 Difference]: Finished difference Result 306 states and 465 transitions. [2020-12-09 18:59:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-09 18:59:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,278 INFO L225 Difference]: With dead ends: 306 [2020-12-09 18:59:38,278 INFO L226 Difference]: Without dead ends: 158 [2020-12-09 18:59:38,279 INFO L677 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 [2020-12-09 18:59:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-09 18:59:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-12-09 18:59:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 18:59:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 227 transitions. [2020-12-09 18:59:38,287 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 227 transitions. Word has length 22 [2020-12-09 18:59:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,287 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 227 transitions. [2020-12-09 18:59:38,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 227 transitions. [2020-12-09 18:59:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 18:59:38,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:59:38,289 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1414806574, now seen corresponding path program 1 times [2020-12-09 18:59:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849911227] [2020-12-09 18:59:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849911227] [2020-12-09 18:59:38,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146989672] [2020-12-09 18:59:38,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,319 INFO L87 Difference]: Start difference. First operand 150 states and 227 transitions. Second operand 3 states. [2020-12-09 18:59:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,391 INFO L93 Difference]: Finished difference Result 300 states and 454 transitions. [2020-12-09 18:59:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-09 18:59:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,393 INFO L225 Difference]: With dead ends: 300 [2020-12-09 18:59:38,393 INFO L226 Difference]: Without dead ends: 152 [2020-12-09 18:59:38,393 INFO L677 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 [2020-12-09 18:59:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-09 18:59:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-12-09 18:59:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 18:59:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 226 transitions. [2020-12-09 18:59:38,401 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 226 transitions. Word has length 22 [2020-12-09 18:59:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,402 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 226 transitions. [2020-12-09 18:59:38,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 226 transitions. [2020-12-09 18:59:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 18:59:38,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:59:38,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1597568045, now seen corresponding path program 1 times [2020-12-09 18:59:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458840758] [2020-12-09 18:59:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458840758] [2020-12-09 18:59:38,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586864888] [2020-12-09 18:59:38,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,432 INFO L87 Difference]: Start difference. First operand 150 states and 226 transitions. Second operand 3 states. [2020-12-09 18:59:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,502 INFO L93 Difference]: Finished difference Result 306 states and 459 transitions. [2020-12-09 18:59:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-09 18:59:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,503 INFO L225 Difference]: With dead ends: 306 [2020-12-09 18:59:38,503 INFO L226 Difference]: Without dead ends: 158 [2020-12-09 18:59:38,503 INFO L677 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 [2020-12-09 18:59:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-09 18:59:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-12-09 18:59:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 18:59:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 224 transitions. [2020-12-09 18:59:38,508 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 224 transitions. Word has length 23 [2020-12-09 18:59:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,508 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 224 transitions. [2020-12-09 18:59:38,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 224 transitions. [2020-12-09 18:59:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 18:59:38,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:59:38,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2062856070, now seen corresponding path program 1 times [2020-12-09 18:59:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553752326] [2020-12-09 18:59:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553752326] [2020-12-09 18:59:38,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143436026] [2020-12-09 18:59:38,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,529 INFO L87 Difference]: Start difference. First operand 150 states and 224 transitions. Second operand 3 states. [2020-12-09 18:59:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,618 INFO L93 Difference]: Finished difference Result 306 states and 455 transitions. [2020-12-09 18:59:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:38,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-09 18:59:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,620 INFO L225 Difference]: With dead ends: 306 [2020-12-09 18:59:38,620 INFO L226 Difference]: Without dead ends: 158 [2020-12-09 18:59:38,620 INFO L677 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 [2020-12-09 18:59:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-09 18:59:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-12-09 18:59:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-09 18:59:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2020-12-09 18:59:38,627 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 24 [2020-12-09 18:59:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,628 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2020-12-09 18:59:38,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2020-12-09 18:59:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 18:59:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:59:38,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1215804460, now seen corresponding path program 1 times [2020-12-09 18:59:38,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332539408] [2020-12-09 18:59:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332539408] [2020-12-09 18:59:38,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:59:38,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764874763] [2020-12-09 18:59:38,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:59:38,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:59:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:59:38,668 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand 4 states. [2020-12-09 18:59:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:38,830 INFO L93 Difference]: Finished difference Result 398 states and 590 transitions. [2020-12-09 18:59:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:59:38,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-09 18:59:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:38,832 INFO L225 Difference]: With dead ends: 398 [2020-12-09 18:59:38,832 INFO L226 Difference]: Without dead ends: 250 [2020-12-09 18:59:38,833 INFO L677 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 [2020-12-09 18:59:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-09 18:59:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2020-12-09 18:59:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-09 18:59:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-12-09 18:59:38,842 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 24 [2020-12-09 18:59:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:38,842 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-12-09 18:59:38,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:59:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-12-09 18:59:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 18:59:38,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:38,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:38,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:59:38,844 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2025622822, now seen corresponding path program 1 times [2020-12-09 18:59:38,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317267435] [2020-12-09 18:59:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:38,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317267435] [2020-12-09 18:59:38,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:38,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:38,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817922374] [2020-12-09 18:59:38,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:38,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:38,870 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 3 states. [2020-12-09 18:59:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,011 INFO L93 Difference]: Finished difference Result 530 states and 797 transitions. [2020-12-09 18:59:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-09 18:59:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,013 INFO L225 Difference]: With dead ends: 530 [2020-12-09 18:59:39,013 INFO L226 Difference]: Without dead ends: 294 [2020-12-09 18:59:39,013 INFO L677 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 [2020-12-09 18:59:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-09 18:59:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2020-12-09 18:59:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-09 18:59:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 434 transitions. [2020-12-09 18:59:39,024 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 434 transitions. Word has length 39 [2020-12-09 18:59:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,024 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 434 transitions. [2020-12-09 18:59:39,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 434 transitions. [2020-12-09 18:59:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 18:59:39,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:59:39,026 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1637358066, now seen corresponding path program 1 times [2020-12-09 18:59:39,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783879666] [2020-12-09 18:59:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:39,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783879666] [2020-12-09 18:59:39,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453348592] [2020-12-09 18:59:39,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,060 INFO L87 Difference]: Start difference. First operand 286 states and 434 transitions. Second operand 3 states. [2020-12-09 18:59:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,168 INFO L93 Difference]: Finished difference Result 575 states and 871 transitions. [2020-12-09 18:59:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-09 18:59:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,170 INFO L225 Difference]: With dead ends: 575 [2020-12-09 18:59:39,171 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 18:59:39,171 INFO L677 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 [2020-12-09 18:59:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 18:59:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 284. [2020-12-09 18:59:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-09 18:59:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 430 transitions. [2020-12-09 18:59:39,186 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 430 transitions. Word has length 40 [2020-12-09 18:59:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,187 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 430 transitions. [2020-12-09 18:59:39,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 430 transitions. [2020-12-09 18:59:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-09 18:59:39,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:59:39,188 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash -864966790, now seen corresponding path program 1 times [2020-12-09 18:59:39,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369711509] [2020-12-09 18:59:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 18:59:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369711509] [2020-12-09 18:59:39,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092333983] [2020-12-09 18:59:39,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,221 INFO L87 Difference]: Start difference. First operand 284 states and 430 transitions. Second operand 3 states. [2020-12-09 18:59:39,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,348 INFO L93 Difference]: Finished difference Result 603 states and 917 transitions. [2020-12-09 18:59:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-09 18:59:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,351 INFO L225 Difference]: With dead ends: 603 [2020-12-09 18:59:39,351 INFO L226 Difference]: Without dead ends: 321 [2020-12-09 18:59:39,352 INFO L677 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 [2020-12-09 18:59:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-09 18:59:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2020-12-09 18:59:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-12-09 18:59:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 487 transitions. [2020-12-09 18:59:39,367 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 487 transitions. Word has length 47 [2020-12-09 18:59:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,367 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 487 transitions. [2020-12-09 18:59:39,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 487 transitions. [2020-12-09 18:59:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-09 18:59:39,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 18:59:39,369 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1868950643, now seen corresponding path program 1 times [2020-12-09 18:59:39,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384115566] [2020-12-09 18:59:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 18:59:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384115566] [2020-12-09 18:59:39,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288661937] [2020-12-09 18:59:39,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,408 INFO L87 Difference]: Start difference. First operand 321 states and 487 transitions. Second operand 3 states. [2020-12-09 18:59:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,526 INFO L93 Difference]: Finished difference Result 679 states and 1031 transitions. [2020-12-09 18:59:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-09 18:59:39,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,528 INFO L225 Difference]: With dead ends: 679 [2020-12-09 18:59:39,529 INFO L226 Difference]: Without dead ends: 360 [2020-12-09 18:59:39,529 INFO L677 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 [2020-12-09 18:59:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-09 18:59:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2020-12-09 18:59:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-12-09 18:59:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 539 transitions. [2020-12-09 18:59:39,540 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 539 transitions. Word has length 73 [2020-12-09 18:59:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,540 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 539 transitions. [2020-12-09 18:59:39,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 539 transitions. [2020-12-09 18:59:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-09 18:59:39,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 18:59:39,541 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1516265344, now seen corresponding path program 1 times [2020-12-09 18:59:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995385067] [2020-12-09 18:59:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 18:59:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995385067] [2020-12-09 18:59:39,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459598964] [2020-12-09 18:59:39,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,573 INFO L87 Difference]: Start difference. First operand 356 states and 539 transitions. Second operand 3 states. [2020-12-09 18:59:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,675 INFO L93 Difference]: Finished difference Result 712 states and 1078 transitions. [2020-12-09 18:59:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-09 18:59:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,677 INFO L225 Difference]: With dead ends: 712 [2020-12-09 18:59:39,677 INFO L226 Difference]: Without dead ends: 358 [2020-12-09 18:59:39,678 INFO L677 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 [2020-12-09 18:59:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-09 18:59:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2020-12-09 18:59:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-12-09 18:59:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 536 transitions. [2020-12-09 18:59:39,689 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 536 transitions. Word has length 74 [2020-12-09 18:59:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,689 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 536 transitions. [2020-12-09 18:59:39,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 536 transitions. [2020-12-09 18:59:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-09 18:59:39,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 18:59:39,690 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2052949795, now seen corresponding path program 1 times [2020-12-09 18:59:39,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365815487] [2020-12-09 18:59:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 18:59:39,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365815487] [2020-12-09 18:59:39,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670453055] [2020-12-09 18:59:39,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,714 INFO L87 Difference]: Start difference. First operand 356 states and 536 transitions. Second operand 3 states. [2020-12-09 18:59:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:39,846 INFO L93 Difference]: Finished difference Result 759 states and 1147 transitions. [2020-12-09 18:59:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:39,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-09 18:59:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:39,849 INFO L225 Difference]: With dead ends: 759 [2020-12-09 18:59:39,849 INFO L226 Difference]: Without dead ends: 405 [2020-12-09 18:59:39,850 INFO L677 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 [2020-12-09 18:59:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-12-09 18:59:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 389. [2020-12-09 18:59:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-09 18:59:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 583 transitions. [2020-12-09 18:59:39,873 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 583 transitions. Word has length 75 [2020-12-09 18:59:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:39,873 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 583 transitions. [2020-12-09 18:59:39,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 583 transitions. [2020-12-09 18:59:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-09 18:59:39,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:39,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:39,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-09 18:59:39,875 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1001686192, now seen corresponding path program 1 times [2020-12-09 18:59:39,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:39,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885175779] [2020-12-09 18:59:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 18:59:39,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885175779] [2020-12-09 18:59:39,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:39,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157580671] [2020-12-09 18:59:39,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:39,913 INFO L87 Difference]: Start difference. First operand 389 states and 583 transitions. Second operand 3 states. [2020-12-09 18:59:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,038 INFO L93 Difference]: Finished difference Result 784 states and 1177 transitions. [2020-12-09 18:59:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-09 18:59:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,040 INFO L225 Difference]: With dead ends: 784 [2020-12-09 18:59:40,040 INFO L226 Difference]: Without dead ends: 397 [2020-12-09 18:59:40,041 INFO L677 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 [2020-12-09 18:59:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-12-09 18:59:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 389. [2020-12-09 18:59:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-09 18:59:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 579 transitions. [2020-12-09 18:59:40,054 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 579 transitions. Word has length 76 [2020-12-09 18:59:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,054 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 579 transitions. [2020-12-09 18:59:40,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 579 transitions. [2020-12-09 18:59:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 18:59:40,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-09 18:59:40,056 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash 405376916, now seen corresponding path program 1 times [2020-12-09 18:59:40,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281089835] [2020-12-09 18:59:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281089835] [2020-12-09 18:59:40,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484172911] [2020-12-09 18:59:40,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,082 INFO L87 Difference]: Start difference. First operand 389 states and 579 transitions. Second operand 3 states. [2020-12-09 18:59:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,219 INFO L93 Difference]: Finished difference Result 828 states and 1233 transitions. [2020-12-09 18:59:40,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-09 18:59:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,222 INFO L225 Difference]: With dead ends: 828 [2020-12-09 18:59:40,222 INFO L226 Difference]: Without dead ends: 441 [2020-12-09 18:59:40,223 INFO L677 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 [2020-12-09 18:59:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-12-09 18:59:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 435. [2020-12-09 18:59:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-09 18:59:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 648 transitions. [2020-12-09 18:59:40,244 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 648 transitions. Word has length 78 [2020-12-09 18:59:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,244 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 648 transitions. [2020-12-09 18:59:40,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 648 transitions. [2020-12-09 18:59:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-09 18:59:40,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-09 18:59:40,246 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash 757614860, now seen corresponding path program 1 times [2020-12-09 18:59:40,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119510727] [2020-12-09 18:59:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119510727] [2020-12-09 18:59:40,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904254628] [2020-12-09 18:59:40,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,279 INFO L87 Difference]: Start difference. First operand 435 states and 648 transitions. Second operand 3 states. [2020-12-09 18:59:40,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,412 INFO L93 Difference]: Finished difference Result 871 states and 1297 transitions. [2020-12-09 18:59:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-09 18:59:40,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,414 INFO L225 Difference]: With dead ends: 871 [2020-12-09 18:59:40,414 INFO L226 Difference]: Without dead ends: 436 [2020-12-09 18:59:40,415 INFO L677 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 [2020-12-09 18:59:40,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-09 18:59:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-12-09 18:59:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-12-09 18:59:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 643 transitions. [2020-12-09 18:59:40,429 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 643 transitions. Word has length 79 [2020-12-09 18:59:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,429 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 643 transitions. [2020-12-09 18:59:40,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 643 transitions. [2020-12-09 18:59:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-09 18:59:40,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 18:59:40,430 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1688651286, now seen corresponding path program 1 times [2020-12-09 18:59:40,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650635299] [2020-12-09 18:59:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 18:59:40,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650635299] [2020-12-09 18:59:40,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442783361] [2020-12-09 18:59:40,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,463 INFO L87 Difference]: Start difference. First operand 433 states and 643 transitions. Second operand 3 states. [2020-12-09 18:59:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,559 INFO L93 Difference]: Finished difference Result 895 states and 1327 transitions. [2020-12-09 18:59:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-09 18:59:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,562 INFO L225 Difference]: With dead ends: 895 [2020-12-09 18:59:40,562 INFO L226 Difference]: Without dead ends: 464 [2020-12-09 18:59:40,563 INFO L677 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 [2020-12-09 18:59:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-12-09 18:59:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2020-12-09 18:59:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-09 18:59:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 676 transitions. [2020-12-09 18:59:40,578 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 676 transitions. Word has length 96 [2020-12-09 18:59:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,578 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 676 transitions. [2020-12-09 18:59:40,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 676 transitions. [2020-12-09 18:59:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-09 18:59:40,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-09 18:59:40,579 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 729713085, now seen corresponding path program 1 times [2020-12-09 18:59:40,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416590981] [2020-12-09 18:59:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-09 18:59:40,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416590981] [2020-12-09 18:59:40,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733423734] [2020-12-09 18:59:40,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,604 INFO L87 Difference]: Start difference. First operand 460 states and 676 transitions. Second operand 3 states. [2020-12-09 18:59:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,709 INFO L93 Difference]: Finished difference Result 920 states and 1352 transitions. [2020-12-09 18:59:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-09 18:59:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,712 INFO L225 Difference]: With dead ends: 920 [2020-12-09 18:59:40,712 INFO L226 Difference]: Without dead ends: 462 [2020-12-09 18:59:40,712 INFO L677 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 [2020-12-09 18:59:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-09 18:59:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2020-12-09 18:59:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-09 18:59:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 670 transitions. [2020-12-09 18:59:40,728 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 670 transitions. Word has length 97 [2020-12-09 18:59:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,728 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 670 transitions. [2020-12-09 18:59:40,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 670 transitions. [2020-12-09 18:59:40,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-09 18:59:40,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-09 18:59:40,730 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1386643530, now seen corresponding path program 1 times [2020-12-09 18:59:40,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999714192] [2020-12-09 18:59:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 18:59:40,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999714192] [2020-12-09 18:59:40,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69840369] [2020-12-09 18:59:40,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,770 INFO L87 Difference]: Start difference. First operand 460 states and 670 transitions. Second operand 3 states. [2020-12-09 18:59:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:40,902 INFO L93 Difference]: Finished difference Result 969 states and 1415 transitions. [2020-12-09 18:59:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:40,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-09 18:59:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:40,905 INFO L225 Difference]: With dead ends: 969 [2020-12-09 18:59:40,905 INFO L226 Difference]: Without dead ends: 511 [2020-12-09 18:59:40,906 INFO L677 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 [2020-12-09 18:59:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-09 18:59:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 491. [2020-12-09 18:59:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-09 18:59:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 709 transitions. [2020-12-09 18:59:40,923 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 709 transitions. Word has length 100 [2020-12-09 18:59:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:40,923 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 709 transitions. [2020-12-09 18:59:40,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 709 transitions. [2020-12-09 18:59:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-09 18:59:40,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:40,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:40,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-09 18:59:40,924 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash 911867081, now seen corresponding path program 1 times [2020-12-09 18:59:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:40,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763900806] [2020-12-09 18:59:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 18:59:40,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763900806] [2020-12-09 18:59:40,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:40,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:40,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895197603] [2020-12-09 18:59:40,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:40,953 INFO L87 Difference]: Start difference. First operand 491 states and 709 transitions. Second operand 3 states. [2020-12-09 18:59:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:41,076 INFO L93 Difference]: Finished difference Result 990 states and 1432 transitions. [2020-12-09 18:59:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:41,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-09 18:59:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:41,079 INFO L225 Difference]: With dead ends: 990 [2020-12-09 18:59:41,079 INFO L226 Difference]: Without dead ends: 501 [2020-12-09 18:59:41,079 INFO L677 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 [2020-12-09 18:59:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-12-09 18:59:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 491. [2020-12-09 18:59:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-09 18:59:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 703 transitions. [2020-12-09 18:59:41,100 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 703 transitions. Word has length 101 [2020-12-09 18:59:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:41,100 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 703 transitions. [2020-12-09 18:59:41,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 703 transitions. [2020-12-09 18:59:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-09 18:59:41,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:41,101 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:41,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-09 18:59:41,102 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1202258629, now seen corresponding path program 1 times [2020-12-09 18:59:41,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:41,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547786534] [2020-12-09 18:59:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547786534] [2020-12-09 18:59:41,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853519204] [2020-12-09 18:59:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 18:59:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:59:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:59:41,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:59:41,446 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 18:59:41,446 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 18:59:41,480 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 18:59:41,480 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 18:59:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-09 18:59:41,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904423503] [2020-12-09 18:59:41,528 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2020-12-09 18:59:41,528 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:59:41,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:59:41,536 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:59:41,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:59:42,537 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-12-09 18:59:43,016 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:59:43,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:59:43,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 7 [2020-12-09 18:59:43,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979814965] [2020-12-09 18:59:43,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 18:59:43,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 18:59:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:59:43,017 INFO L87 Difference]: Start difference. First operand 491 states and 703 transitions. Second operand 8 states. [2020-12-09 18:59:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:43,159 INFO L93 Difference]: Finished difference Result 2359 states and 3385 transitions. [2020-12-09 18:59:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:59:43,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-09 18:59:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:43,169 INFO L225 Difference]: With dead ends: 2359 [2020-12-09 18:59:43,169 INFO L226 Difference]: Without dead ends: 2357 [2020-12-09 18:59:43,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:59:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2020-12-09 18:59:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2338. [2020-12-09 18:59:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-12-09 18:59:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3362 transitions. [2020-12-09 18:59:43,251 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3362 transitions. Word has length 111 [2020-12-09 18:59:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:43,251 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3362 transitions. [2020-12-09 18:59:43,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 18:59:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3362 transitions. [2020-12-09 18:59:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-09 18:59:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:43,253 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:43,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-09 18:59:43,454 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1964140081, now seen corresponding path program 1 times [2020-12-09 18:59:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652143755] [2020-12-09 18:59:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-09 18:59:43,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652143755] [2020-12-09 18:59:43,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:43,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:43,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572026944] [2020-12-09 18:59:43,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:43,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:43,490 INFO L87 Difference]: Start difference. First operand 2338 states and 3362 transitions. Second operand 3 states. [2020-12-09 18:59:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:43,709 INFO L93 Difference]: Finished difference Result 4787 states and 6876 transitions. [2020-12-09 18:59:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:43,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-09 18:59:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:43,719 INFO L225 Difference]: With dead ends: 4787 [2020-12-09 18:59:43,719 INFO L226 Difference]: Without dead ends: 2451 [2020-12-09 18:59:43,721 INFO L677 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 [2020-12-09 18:59:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2020-12-09 18:59:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2419. [2020-12-09 18:59:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2419 states. [2020-12-09 18:59:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3442 transitions. [2020-12-09 18:59:43,797 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3442 transitions. Word has length 121 [2020-12-09 18:59:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:43,797 INFO L481 AbstractCegarLoop]: Abstraction has 2419 states and 3442 transitions. [2020-12-09 18:59:43,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3442 transitions. [2020-12-09 18:59:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-09 18:59:43,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:43,800 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:43,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-12-09 18:59:43,800 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1273406882, now seen corresponding path program 1 times [2020-12-09 18:59:43,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:43,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037330463] [2020-12-09 18:59:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-09 18:59:43,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037330463] [2020-12-09 18:59:43,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:59:43,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:59:43,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390108020] [2020-12-09 18:59:43,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:59:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:43,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:59:43,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:59:43,839 INFO L87 Difference]: Start difference. First operand 2419 states and 3442 transitions. Second operand 3 states. [2020-12-09 18:59:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:44,008 INFO L93 Difference]: Finished difference Result 4836 states and 6879 transitions. [2020-12-09 18:59:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:59:44,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-09 18:59:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:44,018 INFO L225 Difference]: With dead ends: 4836 [2020-12-09 18:59:44,018 INFO L226 Difference]: Without dead ends: 2419 [2020-12-09 18:59:44,021 INFO L677 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 [2020-12-09 18:59:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2020-12-09 18:59:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2399. [2020-12-09 18:59:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-09 18:59:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3380 transitions. [2020-12-09 18:59:44,097 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3380 transitions. Word has length 122 [2020-12-09 18:59:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:44,097 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3380 transitions. [2020-12-09 18:59:44,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:59:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3380 transitions. [2020-12-09 18:59:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-09 18:59:44,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:44,099 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:44,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-12-09 18:59:44,100 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1362543008, now seen corresponding path program 1 times [2020-12-09 18:59:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:44,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018827372] [2020-12-09 18:59:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 120 proven. 5 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-09 18:59:44,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018827372] [2020-12-09 18:59:44,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806805746] [2020-12-09 18:59:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:59:44,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:59:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-12-09 18:59:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:59:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-12-09 18:59:44,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:59:44,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 18:59:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270342162] [2020-12-09 18:59:44,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:59:44,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:59:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:59:44,404 INFO L87 Difference]: Start difference. First operand 2399 states and 3380 transitions. Second operand 4 states. [2020-12-09 18:59:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:44,670 INFO L93 Difference]: Finished difference Result 4642 states and 6515 transitions. [2020-12-09 18:59:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:59:44,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-09 18:59:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:44,682 INFO L225 Difference]: With dead ends: 4642 [2020-12-09 18:59:44,682 INFO L226 Difference]: Without dead ends: 2126 [2020-12-09 18:59:44,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:59:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2020-12-09 18:59:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2074. [2020-12-09 18:59:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2020-12-09 18:59:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2869 transitions. [2020-12-09 18:59:44,752 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2869 transitions. Word has length 154 [2020-12-09 18:59:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:44,752 INFO L481 AbstractCegarLoop]: Abstraction has 2074 states and 2869 transitions. [2020-12-09 18:59:44,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:59:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2869 transitions. [2020-12-09 18:59:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-09 18:59:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:44,755 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:44,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:44,956 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -547867142, now seen corresponding path program 1 times [2020-12-09 18:59:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:44,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813366305] [2020-12-09 18:59:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 174 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-09 18:59:45,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813366305] [2020-12-09 18:59:45,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504477378] [2020-12-09 18:59:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 18:59:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:59:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 174 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-09 18:59:45,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:59:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 174 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-09 18:59:45,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393101484] [2020-12-09 18:59:45,378 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2020-12-09 18:59:45,378 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:59:45,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:59:45,379 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:59:45,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:59:49,217 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 249 [2020-12-09 18:59:50,713 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:59:50,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:59:50,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 18:59:50,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889927773] [2020-12-09 18:59:50,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 18:59:50,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 18:59:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:59:50,715 INFO L87 Difference]: Start difference. First operand 2074 states and 2869 transitions. Second operand 8 states. [2020-12-09 18:59:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:51,318 INFO L93 Difference]: Finished difference Result 5418 states and 7417 transitions. [2020-12-09 18:59:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 18:59:51,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 162 [2020-12-09 18:59:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:51,329 INFO L225 Difference]: With dead ends: 5418 [2020-12-09 18:59:51,330 INFO L226 Difference]: Without dead ends: 3346 [2020-12-09 18:59:51,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-09 18:59:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2020-12-09 18:59:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2155. [2020-12-09 18:59:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2155 states. [2020-12-09 18:59:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2845 transitions. [2020-12-09 18:59:51,447 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2845 transitions. Word has length 162 [2020-12-09 18:59:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:51,448 INFO L481 AbstractCegarLoop]: Abstraction has 2155 states and 2845 transitions. [2020-12-09 18:59:51,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 18:59:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2845 transitions. [2020-12-09 18:59:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-09 18:59:51,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:51,451 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:51,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:51,652 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash -479223637, now seen corresponding path program 1 times [2020-12-09 18:59:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588253570] [2020-12-09 18:59:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 134 proven. 100 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 18:59:51,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588253570] [2020-12-09 18:59:51,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695068174] [2020-12-09 18:59:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:59:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 18:59:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:59:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 108 proven. 60 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-09 18:59:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:59:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 160 proven. 8 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-09 18:59:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567468814] [2020-12-09 18:59:52,034 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2020-12-09 18:59:52,035 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:59:52,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:59:52,035 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:59:52,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:59:53,686 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:59:53,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:59:53,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2020-12-09 18:59:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420471868] [2020-12-09 18:59:53,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 18:59:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:59:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 18:59:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:59:53,687 INFO L87 Difference]: Start difference. First operand 2155 states and 2845 transitions. Second operand 9 states. [2020-12-09 18:59:54,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:59:54,394 INFO L93 Difference]: Finished difference Result 6068 states and 7935 transitions. [2020-12-09 18:59:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 18:59:54,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2020-12-09 18:59:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:59:54,407 INFO L225 Difference]: With dead ends: 6068 [2020-12-09 18:59:54,407 INFO L226 Difference]: Without dead ends: 3915 [2020-12-09 18:59:54,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-09 18:59:54,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2020-12-09 18:59:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3219. [2020-12-09 18:59:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3219 states. [2020-12-09 18:59:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4090 transitions. [2020-12-09 18:59:54,506 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4090 transitions. Word has length 167 [2020-12-09 18:59:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:59:54,506 INFO L481 AbstractCegarLoop]: Abstraction has 3219 states and 4090 transitions. [2020-12-09 18:59:54,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 18:59:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4090 transitions. [2020-12-09 18:59:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-09 18:59:54,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:59:54,508 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:59:54,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:59:54,710 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:59:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:59:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -143437794, now seen corresponding path program 1 times [2020-12-09 18:59:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:59:54,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51468280] [2020-12-09 18:59:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:59:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:59:54,767 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:59:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:59:54,810 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:59:54,866 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 18:59:54,866 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:59:54,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2020-12-09 18:59:54,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:59:54 BoogieIcfgContainer [2020-12-09 18:59:54,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:59:54,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:59:54,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:59:54,959 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:59:54,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:59:37" (3/4) ... [2020-12-09 18:59:54,961 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 18:59:55,034 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3c71129c-fcff-47f5-8e54-0905edf8901e/bin/utaipan/witness.graphml [2020-12-09 18:59:55,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:59:55,035 INFO L168 Benchmark]: Toolchain (without parser) took 18811.22 ms. Allocated memory was 102.8 MB in the beginning and 778.0 MB in the end (delta: 675.3 MB). Free memory was 63.0 MB in the beginning and 645.4 MB in the end (delta: -582.4 MB). Peak memory consumption was 94.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,035 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 79.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:59:55,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.30 ms. Allocated memory is still 102.8 MB. Free memory was 62.8 MB in the beginning and 73.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.50 ms. Allocated memory is still 102.8 MB. Free memory was 73.6 MB in the beginning and 70.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,036 INFO L168 Benchmark]: Boogie Preprocessor took 28.06 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 68.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,036 INFO L168 Benchmark]: RCFGBuilder took 756.82 ms. Allocated memory is still 102.8 MB. Free memory was 68.7 MB in the beginning and 44.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,036 INFO L168 Benchmark]: TraceAbstraction took 17656.96 ms. Allocated memory was 102.8 MB in the beginning and 778.0 MB in the end (delta: 675.3 MB). Free memory was 43.3 MB in the beginning and 666.4 MB in the end (delta: -623.1 MB). Peak memory consumption was 478.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,037 INFO L168 Benchmark]: Witness Printer took 75.75 ms. Allocated memory is still 778.0 MB. Free memory was 666.4 MB in the beginning and 645.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:59:55,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 79.5 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 247.30 ms. Allocated memory is still 102.8 MB. Free memory was 62.8 MB in the beginning and 73.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.50 ms. Allocated memory is still 102.8 MB. Free memory was 73.6 MB in the beginning and 70.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.06 ms. Allocated memory is still 102.8 MB. Free memory was 70.8 MB in the beginning and 68.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 756.82 ms. Allocated memory is still 102.8 MB. Free memory was 68.7 MB in the beginning and 44.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17656.96 ms. Allocated memory was 102.8 MB in the beginning and 778.0 MB in the end (delta: 675.3 MB). Free memory was 43.3 MB in the beginning and 666.4 MB in the end (delta: -623.1 MB). Peak memory consumption was 478.2 MB. Max. memory is 16.1 GB. * Witness Printer took 75.75 ms. Allocated memory is still 778.0 MB. Free memory was 666.4 MB in the beginning and 645.4 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 632]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L637] int s ; [L638] int tmp ; [L642] s = 8464 [L14] int s__info_callback = __VERIFIER_nondet_int() ; [L15] int s__in_handshake = __VERIFIER_nondet_int() ; [L16] int s__state ; [L17] int s__new_session ; [L18] int s__server ; [L19] int s__version = __VERIFIER_nondet_int() ; [L20] int s__type ; [L21] int s__init_num ; [L22] int s__hit = __VERIFIER_nondet_int() ; [L23] int s__rwstate ; [L24] int s__init_buf___0 = 1; [L25] int s__debug = __VERIFIER_nondet_int() ; [L26] int s__shutdown ; [L27] int s__cert = __VERIFIER_nondet_int() ; [L28] int s__options = __VERIFIER_nondet_int() ; [L29] int s__verify_mode = __VERIFIER_nondet_int() ; [L30] int s__session__peer = __VERIFIER_nondet_int() ; [L31] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L32] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L35] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L36] int s__s3__tmp__cert_request ; [L37] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__use_rsa_tmp ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_cipher__algo_strength ; [L43] int s__session__cipher ; [L44] int buf ; [L45] unsigned long l ; [L46] unsigned long Time ; [L47] unsigned long tmp ; [L48] int cb ; [L49] long num1 = __VERIFIER_nondet_long() ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int got_new_session ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 = __VERIFIER_nondet_int() ; [L62] long tmp___8 = __VERIFIER_nondet_long() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int tmp___10 = __VERIFIER_nondet_int() ; [L65] int blastFlag ; [L66] int __cil_tmp55 ; [L67] unsigned long __cil_tmp56 ; [L68] unsigned long __cil_tmp57 ; [L69] unsigned long __cil_tmp58 = __VERIFIER_nondet_ulong() ; [L70] unsigned long __cil_tmp59 ; [L71] int __cil_tmp60 ; [L72] unsigned long __cil_tmp61 ; [L75] s__state = initial_state [L76] blastFlag = 0 [L77] tmp = __VERIFIER_nondet_int() [L78] Time = tmp [L79] cb = 0 [L80] ret = -1 [L81] skip = 0 [L82] got_new_session = 0 [L83] COND TRUE s__info_callback != 0 [L84] cb = s__info_callback [L90] s__in_handshake ++ [L91] COND TRUE tmp___1 + 12288 [L92] COND TRUE tmp___2 + 16384 [L96] COND FALSE !(s__cert == 0) [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND TRUE s__state == 8464 [L273] s__shutdown = 0 [L274] ret = __VERIFIER_nondet_int() [L275] COND TRUE blastFlag == 0 [L276] blastFlag = 1 [L278] COND FALSE !(ret <= 0) [L281] got_new_session = 1 [L282] s__state = 8496 [L283] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND TRUE s__state == 8496 [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 1 [L289] blastFlag = 2 [L295] COND FALSE !(ret <= 0) [L298] COND FALSE !(\read(s__hit)) [L301] s__state = 8512 [L303] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND TRUE s__state == 8512 [L308] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L309] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L310] COND TRUE __cil_tmp56 + 256UL [L311] skip = 1 [L319] s__state = 8528 [L320] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND TRUE s__state == 8528 [L324] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L325] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L327] __cil_tmp57 = (unsigned long )s__options [L328] COND TRUE __cil_tmp57 + 2097152UL [L329] s__s3__tmp__use_rsa_tmp = 1 [L334] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(ret <= 0) [L379] s__state = 8544 [L380] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND TRUE s__state == 8544 [L384] COND TRUE s__verify_mode + 1 [L385] COND FALSE !(s__session__peer != 0) [L396] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L397] __cil_tmp61 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L398] COND FALSE !(__cil_tmp61 + 256UL) [L408] s__s3__tmp__cert_request = 1 [L409] ret = __VERIFIER_nondet_int() [L410] COND FALSE !(ret <= 0) [L413] s__state = 8448 [L414] s__s3__tmp__next_state___0 = 8576 [L415] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND FALSE !(s__state == 8544) [L157] COND FALSE !(s__state == 8545) [L160] COND FALSE !(s__state == 8560) [L163] COND FALSE !(s__state == 8561) [L166] COND TRUE s__state == 8448 [L436] COND FALSE !(num1 > 0L) [L445] s__state = s__s3__tmp__next_state___0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND FALSE !(s__state == 8544) [L157] COND FALSE !(s__state == 8545) [L160] COND FALSE !(s__state == 8560) [L163] COND FALSE !(s__state == 8561) [L166] COND FALSE !(s__state == 8448) [L169] COND TRUE s__state == 8576 [L449] ret = __VERIFIER_nondet_int() [L450] COND FALSE !(ret <= 0) [L453] COND FALSE !(ret == 2) [L456] ret = __VERIFIER_nondet_int() [L457] COND FALSE !(ret <= 0) [L460] s__init_num = 0 [L461] s__state = 8592 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND TRUE state == 8576 [L605] COND TRUE s__state == 8592 [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE tmp___2 != -16384 [L608] COND TRUE __cil_tmp56 != 4294967040 [L609] COND TRUE __cil_tmp58 != 4294967294 [L610] COND TRUE tmp___7 != 1024 [L611] COND TRUE tmp___7 != 512 [L632] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 114 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.5s, OverallIterations: 29, TraceHistogramMax: 7, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4000 SDtfs, 4953 SDslu, 4094 SDs, 0 SdLazy, 4340 SolverSat, 1171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1269 GetRequests, 1208 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3219occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 2146 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 2778 NumberOfCodeBlocks, 2778 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 3161 ConstructedInterpolants, 0 QuantifiedInterpolants, 841389 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1320 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 36 InterpolantComputations, 26 PerfectInterpolantSequences, 3152/3619 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...