./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_13.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_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_13.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/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 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:02:33,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:02:33,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:02:33,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:02:33,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:02:33,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:02:33,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:02:33,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:02:33,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:02:33,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:02:33,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:02:33,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:02:33,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:02:33,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:02:33,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:02:33,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:02:33,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:02:33,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:02:33,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:02:33,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:02:33,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:02:33,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:02:33,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:02:33,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:02:33,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:02:33,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:02:33,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:02:33,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:02:33,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:02:33,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:02:33,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:02:33,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:02:33,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:02:33,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:02:33,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:02:33,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:02:33,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:02:33,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:02:33,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:02:33,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:02:33,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:02:33,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:02:33,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:02:33,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:02:33,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:02:33,983 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:02:33,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:02:33,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:02:33,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:02:33,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:02:33,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:02:33,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:02:33,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:02:33,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:02:33,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:02:33,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:02:33,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:02:33,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:02:33,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:02:33,988 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_2853b1d1-c72c-4f33-a26a-2213e470cbae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 [2020-12-09 11:02:34,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:02:34,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:02:34,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:02:34,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:02:34,213 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:02:34,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_13.c [2020-12-09 11:02:34,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/data/1947815f5/29c3d8d688d346edb06a27b709314a5e/FLAG571d1c652 [2020-12-09 11:02:34,630 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:02:34,630 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/sv-benchmarks/c/locks/test_locks_13.c [2020-12-09 11:02:34,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/data/1947815f5/29c3d8d688d346edb06a27b709314a5e/FLAG571d1c652 [2020-12-09 11:02:34,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/data/1947815f5/29c3d8d688d346edb06a27b709314a5e [2020-12-09 11:02:34,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:02:34,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:02:34,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:02:34,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:02:34,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:02:34,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f853ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34, skipping insertion in model container [2020-12-09 11:02:34,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:02:34,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:02:34,786 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_2853b1d1-c72c-4f33-a26a-2213e470cbae/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2020-12-09 11:02:34,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:02:34,798 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:02:34,819 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_2853b1d1-c72c-4f33-a26a-2213e470cbae/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2020-12-09 11:02:34,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:02:34,829 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:02:34,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34 WrapperNode [2020-12-09 11:02:34,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:02:34,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:02:34,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:02:34,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:02:34,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:02:34,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:02:34,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:02:34,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:02:34,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... [2020-12-09 11:02:34,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:02:34,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:02:34,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:02:34,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:02:34,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/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 11:02:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:02:34,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:02:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:02:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:02:35,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:02:35,375 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 11:02:35,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:02:35 BoogieIcfgContainer [2020-12-09 11:02:35,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:02:35,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:02:35,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:02:35,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:02:35,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:02:34" (1/3) ... [2020-12-09 11:02:35,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68affb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:02:35, skipping insertion in model container [2020-12-09 11:02:35,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:02:34" (2/3) ... [2020-12-09 11:02:35,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68affb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:02:35, skipping insertion in model container [2020-12-09 11:02:35,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:02:35" (3/3) ... [2020-12-09 11:02:35,383 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-12-09 11:02:35,393 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:02:35,396 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 11:02:35,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 11:02:35,430 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:02:35,430 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:02:35,430 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:02:35,430 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:02:35,431 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:02:35,431 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:02:35,431 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:02:35,431 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:02:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-12-09 11:02:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:02:35,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -583953647, now seen corresponding path program 1 times [2020-12-09 11:02:35,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374785818] [2020-12-09 11:02:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,596 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 11:02:35,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374785818] [2020-12-09 11:02:35,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321398053] [2020-12-09 11:02:35,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,611 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-12-09 11:02:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,644 INFO L93 Difference]: Finished difference Result 70 states and 121 transitions. [2020-12-09 11:02:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 11:02:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,652 INFO L225 Difference]: With dead ends: 70 [2020-12-09 11:02:35,652 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 11:02:35,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 11:02:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-12-09 11:02:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 55 transitions. [2020-12-09 11:02:35,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 55 transitions. Word has length 6 [2020-12-09 11:02:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,678 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 55 transitions. [2020-12-09 11:02:35,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 55 transitions. [2020-12-09 11:02:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:02:35,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:02:35,679 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash -922481497, now seen corresponding path program 1 times [2020-12-09 11:02:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127642913] [2020-12-09 11:02:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,723 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 11:02:35,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127642913] [2020-12-09 11:02:35,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912615249] [2020-12-09 11:02:35,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,725 INFO L87 Difference]: Start difference. First operand 31 states and 55 transitions. Second operand 4 states. [2020-12-09 11:02:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,749 INFO L93 Difference]: Finished difference Result 59 states and 103 transitions. [2020-12-09 11:02:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 11:02:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,750 INFO L225 Difference]: With dead ends: 59 [2020-12-09 11:02:35,750 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 11:02:35,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 11:02:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2020-12-09 11:02:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2020-12-09 11:02:35,755 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 7 [2020-12-09 11:02:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,756 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2020-12-09 11:02:35,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2020-12-09 11:02:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 11:02:35,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:02:35,757 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1468057382, now seen corresponding path program 1 times [2020-12-09 11:02:35,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115061587] [2020-12-09 11:02:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,798 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 11:02:35,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115061587] [2020-12-09 11:02:35,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407115956] [2020-12-09 11:02:35,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,801 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand 4 states. [2020-12-09 11:02:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,818 INFO L93 Difference]: Finished difference Result 57 states and 98 transitions. [2020-12-09 11:02:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 11:02:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,819 INFO L225 Difference]: With dead ends: 57 [2020-12-09 11:02:35,819 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 11:02:35,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 11:02:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-09 11:02:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 53 transitions. [2020-12-09 11:02:35,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 53 transitions. Word has length 8 [2020-12-09 11:02:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,824 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 53 transitions. [2020-12-09 11:02:35,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 53 transitions. [2020-12-09 11:02:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:02:35,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:02:35,824 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1734648356, now seen corresponding path program 1 times [2020-12-09 11:02:35,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145151782] [2020-12-09 11:02:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,860 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 11:02:35,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145151782] [2020-12-09 11:02:35,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978020876] [2020-12-09 11:02:35,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,862 INFO L87 Difference]: Start difference. First operand 31 states and 53 transitions. Second operand 4 states. [2020-12-09 11:02:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,878 INFO L93 Difference]: Finished difference Result 55 states and 93 transitions. [2020-12-09 11:02:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 11:02:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,880 INFO L225 Difference]: With dead ends: 55 [2020-12-09 11:02:35,880 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 11:02:35,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 11:02:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2020-12-09 11:02:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 52 transitions. [2020-12-09 11:02:35,884 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 52 transitions. Word has length 9 [2020-12-09 11:02:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,884 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 52 transitions. [2020-12-09 11:02:35,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 52 transitions. [2020-12-09 11:02:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 11:02:35,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:02:35,885 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2060689211, now seen corresponding path program 1 times [2020-12-09 11:02:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134373445] [2020-12-09 11:02:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,918 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 11:02:35,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134373445] [2020-12-09 11:02:35,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927897855] [2020-12-09 11:02:35,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,920 INFO L87 Difference]: Start difference. First operand 31 states and 52 transitions. Second operand 4 states. [2020-12-09 11:02:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,935 INFO L93 Difference]: Finished difference Result 53 states and 88 transitions. [2020-12-09 11:02:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 11:02:35,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,937 INFO L225 Difference]: With dead ends: 53 [2020-12-09 11:02:35,937 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 11:02:35,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 11:02:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2020-12-09 11:02:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-12-09 11:02:35,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 10 [2020-12-09 11:02:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,941 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-12-09 11:02:35,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-12-09 11:02:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 11:02:35,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 11:02:35,942 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash -542930159, now seen corresponding path program 1 times [2020-12-09 11:02:35,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069339715] [2020-12-09 11:02:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:35,972 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 11:02:35,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069339715] [2020-12-09 11:02:35,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:35,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:35,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873878927] [2020-12-09 11:02:35,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:35,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,974 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-12-09 11:02:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:35,990 INFO L93 Difference]: Finished difference Result 51 states and 83 transitions. [2020-12-09 11:02:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:35,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 11:02:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:35,991 INFO L225 Difference]: With dead ends: 51 [2020-12-09 11:02:35,991 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 11:02:35,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 11:02:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-12-09 11:02:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2020-12-09 11:02:35,995 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 11 [2020-12-09 11:02:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:35,995 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2020-12-09 11:02:35,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2020-12-09 11:02:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 11:02:35,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:35,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:35,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 11:02:35,996 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash 349248336, now seen corresponding path program 1 times [2020-12-09 11:02:35,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:35,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243506817] [2020-12-09 11:02:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,025 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 11:02:36,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243506817] [2020-12-09 11:02:36,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81251803] [2020-12-09 11:02:36,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,027 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2020-12-09 11:02:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,041 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2020-12-09 11:02:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 11:02:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,042 INFO L225 Difference]: With dead ends: 49 [2020-12-09 11:02:36,042 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 11:02:36,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 11:02:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2020-12-09 11:02:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 49 transitions. [2020-12-09 11:02:36,045 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 49 transitions. Word has length 12 [2020-12-09 11:02:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,045 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 49 transitions. [2020-12-09 11:02:36,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 49 transitions. [2020-12-09 11:02:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:02:36,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 11:02:36,046 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2057989050, now seen corresponding path program 1 times [2020-12-09 11:02:36,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336277807] [2020-12-09 11:02:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,071 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 11:02:36,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336277807] [2020-12-09 11:02:36,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917147091] [2020-12-09 11:02:36,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,073 INFO L87 Difference]: Start difference. First operand 31 states and 49 transitions. Second operand 4 states. [2020-12-09 11:02:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,090 INFO L93 Difference]: Finished difference Result 47 states and 73 transitions. [2020-12-09 11:02:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 11:02:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,091 INFO L225 Difference]: With dead ends: 47 [2020-12-09 11:02:36,091 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 11:02:36,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 11:02:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-12-09 11:02:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2020-12-09 11:02:36,094 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 13 [2020-12-09 11:02:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 48 transitions. [2020-12-09 11:02:36,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2020-12-09 11:02:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:02:36,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 11:02:36,095 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,095 INFO L82 PathProgramCache]: Analyzing trace with hash 627063653, now seen corresponding path program 1 times [2020-12-09 11:02:36,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511149327] [2020-12-09 11:02:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,120 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 11:02:36,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511149327] [2020-12-09 11:02:36,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112033916] [2020-12-09 11:02:36,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,121 INFO L87 Difference]: Start difference. First operand 31 states and 48 transitions. Second operand 4 states. [2020-12-09 11:02:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,134 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2020-12-09 11:02:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 11:02:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,135 INFO L225 Difference]: With dead ends: 45 [2020-12-09 11:02:36,135 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 11:02:36,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 11:02:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-12-09 11:02:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2020-12-09 11:02:36,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 14 [2020-12-09 11:02:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,138 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 47 transitions. [2020-12-09 11:02:36,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 47 transitions. [2020-12-09 11:02:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:02:36,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 11:02:36,139 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2035648133, now seen corresponding path program 1 times [2020-12-09 11:02:36,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185739430] [2020-12-09 11:02:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,163 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 11:02:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185739430] [2020-12-09 11:02:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18522720] [2020-12-09 11:02:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,165 INFO L87 Difference]: Start difference. First operand 31 states and 47 transitions. Second operand 4 states. [2020-12-09 11:02:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,178 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2020-12-09 11:02:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 11:02:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,178 INFO L225 Difference]: With dead ends: 43 [2020-12-09 11:02:36,178 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 11:02:36,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 11:02:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-12-09 11:02:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 46 transitions. [2020-12-09 11:02:36,181 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 46 transitions. Word has length 15 [2020-12-09 11:02:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,181 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 46 transitions. [2020-12-09 11:02:36,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 46 transitions. [2020-12-09 11:02:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 11:02:36,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 11:02:36,182 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1319632762, now seen corresponding path program 1 times [2020-12-09 11:02:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433106046] [2020-12-09 11:02:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,206 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 11:02:36,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433106046] [2020-12-09 11:02:36,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714547611] [2020-12-09 11:02:36,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,207 INFO L87 Difference]: Start difference. First operand 31 states and 46 transitions. Second operand 4 states. [2020-12-09 11:02:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,222 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2020-12-09 11:02:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 11:02:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,223 INFO L225 Difference]: With dead ends: 41 [2020-12-09 11:02:36,223 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 11:02:36,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 11:02:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-09 11:02:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-12-09 11:02:36,227 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 16 [2020-12-09 11:02:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,227 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-12-09 11:02:36,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-12-09 11:02:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 11:02:36,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 11:02:36,228 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2040841552, now seen corresponding path program 1 times [2020-12-09 11:02:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060870043] [2020-12-09 11:02:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,260 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 11:02:36,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060870043] [2020-12-09 11:02:36,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119777446] [2020-12-09 11:02:36,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,262 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 4 states. [2020-12-09 11:02:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,275 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-12-09 11:02:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 11:02:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,276 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:02:36,276 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 11:02:36,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 11:02:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-09 11:02:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 11:02:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2020-12-09 11:02:36,279 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 17 [2020-12-09 11:02:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,279 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2020-12-09 11:02:36,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2020-12-09 11:02:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 11:02:36,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:02:36,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:02:36,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 11:02:36,281 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:02:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:02:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1158637455, now seen corresponding path program 1 times [2020-12-09 11:02:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:02:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479225073] [2020-12-09 11:02:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:02:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:02:36,309 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 11:02:36,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479225073] [2020-12-09 11:02:36,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:02:36,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:02:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110862525] [2020-12-09 11:02:36,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:02:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:02:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:02:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,311 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand 4 states. [2020-12-09 11:02:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:02:36,323 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2020-12-09 11:02:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:02:36,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 11:02:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:02:36,324 INFO L225 Difference]: With dead ends: 33 [2020-12-09 11:02:36,324 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 11:02:36,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:02:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 11:02:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 11:02:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 11:02:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 11:02:36,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 11:02:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:02:36,325 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 11:02:36,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:02:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 11:02:36,325 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 11:02:36,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 11:02:36,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 11:02:36,336 INFO L262 CegarLoopResult]: For program point L52(lines 52 54) no Hoare annotation was computed. [2020-12-09 11:02:36,336 INFO L262 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-12-09 11:02:36,336 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 11:02:36,336 INFO L262 CegarLoopResult]: For program point L152-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,336 INFO L262 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-12-09 11:02:36,336 INFO L265 CegarLoopResult]: At program point L203(lines 7 207) the Hoare annotation is: true [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L137-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L187-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L188(line 188) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L172-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L265 CegarLoopResult]: At program point L206(lines 6 207) the Hoare annotation is: true [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L173(line 173) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L157-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L142-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L192-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L193(line 193) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L177-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,337 INFO L262 CegarLoopResult]: For program point L178(line 178) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L162-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L147-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L265 CegarLoopResult]: At program point L197-1(lines 50 202) the Hoare annotation is: true [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L131-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 205) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L198(line 198) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L258 CegarLoopResult]: At program point L198-1(lines 7 207) the Hoare annotation is: false [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L182-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L183(line 183) no Hoare annotation was computed. [2020-12-09 11:02:36,338 INFO L262 CegarLoopResult]: For program point L167-1(lines 50 202) no Hoare annotation was computed. [2020-12-09 11:02:36,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:02:36 BoogieIcfgContainer [2020-12-09 11:02:36,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:02:36,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:02:36,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:02:36,345 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:02:36,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:02:35" (3/4) ... [2020-12-09 11:02:36,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 11:02:36,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-12-09 11:02:36,356 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 11:02:36,357 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 11:02:36,357 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 11:02:36,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2853b1d1-c72c-4f33-a26a-2213e470cbae/bin/utaipan/witness.graphml [2020-12-09 11:02:36,400 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:02:36,401 INFO L168 Benchmark]: Toolchain (without parser) took 1747.83 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 59.5 MB in the beginning and 66.2 MB in the end (delta: -6.7 MB). Peak memory consumption was 38.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,401 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 100.7 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:02:36,401 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.21 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 48.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,402 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 100.7 MB. Free memory was 48.5 MB in the beginning and 46.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:02:36,402 INFO L168 Benchmark]: Boogie Preprocessor took 28.41 ms. Allocated memory is still 100.7 MB. Free memory was 46.9 MB in the beginning and 78.9 MB in the end (delta: -32.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,402 INFO L168 Benchmark]: RCFGBuilder took 489.26 ms. Allocated memory is still 100.7 MB. Free memory was 78.9 MB in the beginning and 72.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,403 INFO L168 Benchmark]: TraceAbstraction took 966.88 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 71.6 MB in the beginning and 70.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,403 INFO L168 Benchmark]: Witness Printer took 54.59 ms. Allocated memory is still 142.6 MB. Free memory was 70.4 MB in the beginning and 66.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:02:36,404 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 100.7 MB. Free memory is still 75.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.21 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 48.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 100.7 MB. Free memory was 48.5 MB in the beginning and 46.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.41 ms. Allocated memory is still 100.7 MB. Free memory was 46.9 MB in the beginning and 78.9 MB in the end (delta: -32.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * RCFGBuilder took 489.26 ms. Allocated memory is still 100.7 MB. Free memory was 78.9 MB in the beginning and 72.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 966.88 ms. Allocated memory was 100.7 MB in the beginning and 142.6 MB in the end (delta: 41.9 MB). Free memory was 71.6 MB in the beginning and 70.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. * Witness Printer took 54.59 ms. Allocated memory is still 142.6 MB. Free memory was 70.4 MB in the beginning and 66.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 205]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 616 SDtfs, 522 SDslu, 914 SDs, 0 SdLazy, 117 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 204 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 9139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...