./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i --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_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/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 2a065c13e78ed395198628ca646c9399c45083a0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:49:07,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:49:07,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:49:07,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:49:07,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:49:07,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:49:07,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:49:07,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:49:07,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:49:07,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:49:07,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:49:07,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:49:07,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:49:07,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:49:07,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:49:07,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:49:07,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:49:07,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:49:07,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:49:07,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:49:07,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:49:07,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:49:07,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:49:07,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:49:07,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:49:07,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:49:07,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:49:07,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:49:07,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:49:07,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:49:07,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:49:07,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:49:07,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:49:07,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:49:07,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:49:07,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:49:07,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:49:07,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:49:07,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:49:07,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:49:07,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:49:07,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:49:08,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:49:08,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:49:08,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:49:08,034 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:49:08,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:49:08,034 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:49:08,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:49:08,034 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:49:08,035 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:49:08,035 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:49:08,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:49:08,035 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:49:08,035 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:49:08,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:49:08,036 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:49:08,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:49:08,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:49:08,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:49:08,038 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:49:08,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:49:08,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:49:08,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:49:08,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:49:08,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:49:08,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:49:08,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:49:08,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:49:08,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:49:08,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:49:08,040 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_cf33c56d-c024-4671-a023-6b67ef64a74c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a065c13e78ed395198628ca646c9399c45083a0 [2020-12-09 05:49:08,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:49:08,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:49:08,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:49:08,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:49:08,250 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:49:08,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i [2020-12-09 05:49:08,294 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/data/aca055a6a/e8b276e4f81846688b9e7d7c338183e6/FLAG30602ddbf [2020-12-09 05:49:08,709 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:49:08,710 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i [2020-12-09 05:49:08,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/data/aca055a6a/e8b276e4f81846688b9e7d7c338183e6/FLAG30602ddbf [2020-12-09 05:49:08,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/data/aca055a6a/e8b276e4f81846688b9e7d7c338183e6 [2020-12-09 05:49:08,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:49:08,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:49:08,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:49:08,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:49:08,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:49:08,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:49:08" (1/1) ... [2020-12-09 05:49:08,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347f8c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:08, skipping insertion in model container [2020-12-09 05:49:08,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:49:08" (1/1) ... [2020-12-09 05:49:08,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:49:08,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:49:08,886 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_cf33c56d-c024-4671-a023-6b67ef64a74c/sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i[949,962] [2020-12-09 05:49:08,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:49:08,984 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:49:08,993 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_cf33c56d-c024-4671-a023-6b67ef64a74c/sv-benchmarks/c/pthread-wmm/safe000_pso.opt.i[949,962] [2020-12-09 05:49:09,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:49:09,074 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:49:09,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09 WrapperNode [2020-12-09 05:49:09,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:49:09,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:49:09,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:49:09,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:49:09,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:49:09,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:49:09,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:49:09,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:49:09,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... [2020-12-09 05:49:09,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:49:09,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:49:09,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:49:09,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:49:09,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/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 05:49:09,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:49:09,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 05:49:09,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:49:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:49:09,188 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 05:49:09,188 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 05:49:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 05:49:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 05:49:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 05:49:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 05:49:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:49:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 05:49:09,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:49:09,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:49:09,190 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-09 05:49:09,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:49:09,397 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 05:49:09,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:09 BoogieIcfgContainer [2020-12-09 05:49:09,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:49:09,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:49:09,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:49:09,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:49:09,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:49:08" (1/3) ... [2020-12-09 05:49:09,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f544374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:49:09, skipping insertion in model container [2020-12-09 05:49:09,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:09" (2/3) ... [2020-12-09 05:49:09,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f544374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:49:09, skipping insertion in model container [2020-12-09 05:49:09,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:09" (3/3) ... [2020-12-09 05:49:09,405 INFO L111 eAbstractionObserver]: Analyzing ICFG safe000_pso.opt.i [2020-12-09 05:49:09,415 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 05:49:09,415 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:49:09,417 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 05:49:09,417 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 05:49:09,439 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,439 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,440 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,441 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,442 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,443 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,444 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,444 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,444 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,444 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,446 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,446 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,446 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,446 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,450 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,450 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,450 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,450 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,452 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,452 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,452 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,452 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 05:49:09,454 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 05:49:09,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 05:49:09,475 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:49:09,476 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:49:09,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:49:09,476 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:49:09,476 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:49:09,476 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:49:09,476 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:49:09,476 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:49:09,484 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 05:49:09,485 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 05:49:09,487 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-09 05:49:09,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-09 05:49:09,520 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-09 05:49:09,521 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 05:49:09,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-09 05:49:09,526 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-09 05:49:11,174 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-09 05:49:11,346 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-09 05:49:11,399 INFO L131 LiptonReduction]: Checked pairs total: 2653 [2020-12-09 05:49:11,399 INFO L133 LiptonReduction]: Total number of compositions: 59 [2020-12-09 05:49:11,403 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-12-09 05:49:11,421 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-12-09 05:49:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-12-09 05:49:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:49:11,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:11,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:11,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -991402129, now seen corresponding path program 1 times [2020-12-09 05:49:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739175910] [2020-12-09 05:49:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:11,544 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 05:49:11,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739175910] [2020-12-09 05:49:11,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:11,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:49:11,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343354586] [2020-12-09 05:49:11,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 05:49:11,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 05:49:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:49:11,559 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-12-09 05:49:11,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:11,580 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-12-09 05:49:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 05:49:11,581 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 05:49:11,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:11,591 INFO L225 Difference]: With dead ends: 362 [2020-12-09 05:49:11,591 INFO L226 Difference]: Without dead ends: 298 [2020-12-09 05:49:11,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 05:49:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-09 05:49:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-12-09 05:49:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-12-09 05:49:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-12-09 05:49:11,646 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-12-09 05:49:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:11,647 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-12-09 05:49:11,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 05:49:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-12-09 05:49:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:49:11,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:11,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:11,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:49:11,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash -668714259, now seen corresponding path program 1 times [2020-12-09 05:49:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:11,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396257942] [2020-12-09 05:49:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:11,754 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 05:49:11,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396257942] [2020-12-09 05:49:11,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:11,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:49:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733048524] [2020-12-09 05:49:11,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:49:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:49:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:49:11,757 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-12-09 05:49:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:11,808 INFO L93 Difference]: Finished difference Result 545 states and 1490 transitions. [2020-12-09 05:49:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:49:11,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 05:49:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:11,814 INFO L225 Difference]: With dead ends: 545 [2020-12-09 05:49:11,814 INFO L226 Difference]: Without dead ends: 422 [2020-12-09 05:49:11,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-09 05:49:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 352. [2020-12-09 05:49:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-09 05:49:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 987 transitions. [2020-12-09 05:49:11,843 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 987 transitions. Word has length 9 [2020-12-09 05:49:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:11,844 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 987 transitions. [2020-12-09 05:49:11,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:49:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 987 transitions. [2020-12-09 05:49:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 05:49:11,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:11,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:11,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:49:11,846 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:11,846 INFO L82 PathProgramCache]: Analyzing trace with hash 39953638, now seen corresponding path program 1 times [2020-12-09 05:49:11,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:11,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451348124] [2020-12-09 05:49:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:11,917 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 05:49:11,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451348124] [2020-12-09 05:49:11,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:11,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:49:11,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321662664] [2020-12-09 05:49:11,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:49:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:49:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:11,918 INFO L87 Difference]: Start difference. First operand 352 states and 987 transitions. Second operand 5 states. [2020-12-09 05:49:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:11,974 INFO L93 Difference]: Finished difference Result 448 states and 1164 transitions. [2020-12-09 05:49:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 05:49:11,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 05:49:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:11,978 INFO L225 Difference]: With dead ends: 448 [2020-12-09 05:49:11,978 INFO L226 Difference]: Without dead ends: 360 [2020-12-09 05:49:11,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:49:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-12-09 05:49:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 302. [2020-12-09 05:49:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-09 05:49:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 814 transitions. [2020-12-09 05:49:11,992 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 814 transitions. Word has length 10 [2020-12-09 05:49:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:11,992 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 814 transitions. [2020-12-09 05:49:11,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:49:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 814 transitions. [2020-12-09 05:49:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:49:11,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:11,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:11,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:49:11,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1610224715, now seen corresponding path program 1 times [2020-12-09 05:49:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:11,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567653475] [2020-12-09 05:49:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:49:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567653475] [2020-12-09 05:49:12,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:12,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:49:12,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042783893] [2020-12-09 05:49:12,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:49:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:49:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:12,060 INFO L87 Difference]: Start difference. First operand 302 states and 814 transitions. Second operand 5 states. [2020-12-09 05:49:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:12,102 INFO L93 Difference]: Finished difference Result 382 states and 984 transitions. [2020-12-09 05:49:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 05:49:12,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 05:49:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:12,105 INFO L225 Difference]: With dead ends: 382 [2020-12-09 05:49:12,105 INFO L226 Difference]: Without dead ends: 338 [2020-12-09 05:49:12,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:49:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-09 05:49:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 286. [2020-12-09 05:49:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-12-09 05:49:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 762 transitions. [2020-12-09 05:49:12,117 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 762 transitions. Word has length 11 [2020-12-09 05:49:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 762 transitions. [2020-12-09 05:49:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:49:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 762 transitions. [2020-12-09 05:49:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:49:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:12,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:12,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:49:12,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1368326109, now seen corresponding path program 1 times [2020-12-09 05:49:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180605127] [2020-12-09 05:49:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:12,180 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 05:49:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180605127] [2020-12-09 05:49:12,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:12,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:49:12,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096369825] [2020-12-09 05:49:12,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:49:12,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:12,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:49:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:49:12,182 INFO L87 Difference]: Start difference. First operand 286 states and 762 transitions. Second operand 4 states. [2020-12-09 05:49:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:12,214 INFO L93 Difference]: Finished difference Result 354 states and 900 transitions. [2020-12-09 05:49:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:49:12,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 05:49:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:12,217 INFO L225 Difference]: With dead ends: 354 [2020-12-09 05:49:12,217 INFO L226 Difference]: Without dead ends: 286 [2020-12-09 05:49:12,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-09 05:49:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2020-12-09 05:49:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-09 05:49:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 572 transitions. [2020-12-09 05:49:12,228 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 572 transitions. Word has length 12 [2020-12-09 05:49:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:12,228 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 572 transitions. [2020-12-09 05:49:12,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:49:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 572 transitions. [2020-12-09 05:49:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 05:49:12,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:12,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:12,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:49:12,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1069072958, now seen corresponding path program 1 times [2020-12-09 05:49:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319132196] [2020-12-09 05:49:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:12,292 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 05:49:12,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319132196] [2020-12-09 05:49:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:12,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:49:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139226024] [2020-12-09 05:49:12,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:49:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:12,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:49:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:12,294 INFO L87 Difference]: Start difference. First operand 218 states and 572 transitions. Second operand 5 states. [2020-12-09 05:49:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:12,329 INFO L93 Difference]: Finished difference Result 278 states and 700 transitions. [2020-12-09 05:49:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:49:12,329 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 05:49:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:12,330 INFO L225 Difference]: With dead ends: 278 [2020-12-09 05:49:12,330 INFO L226 Difference]: Without dead ends: 134 [2020-12-09 05:49:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:49:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-09 05:49:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-12-09 05:49:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-09 05:49:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 312 transitions. [2020-12-09 05:49:12,334 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 312 transitions. Word has length 12 [2020-12-09 05:49:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:12,335 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 312 transitions. [2020-12-09 05:49:12,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:49:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 312 transitions. [2020-12-09 05:49:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 05:49:12,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:12,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:12,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 05:49:12,336 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1136607611, now seen corresponding path program 1 times [2020-12-09 05:49:12,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:12,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226492319] [2020-12-09 05:49:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:12,389 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 05:49:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226492319] [2020-12-09 05:49:12,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:12,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 05:49:12,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325529849] [2020-12-09 05:49:12,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 05:49:12,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 05:49:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:49:12,391 INFO L87 Difference]: Start difference. First operand 134 states and 312 transitions. Second operand 6 states. [2020-12-09 05:49:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:12,419 INFO L93 Difference]: Finished difference Result 162 states and 372 transitions. [2020-12-09 05:49:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 05:49:12,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 05:49:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:12,420 INFO L225 Difference]: With dead ends: 162 [2020-12-09 05:49:12,420 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 05:49:12,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 05:49:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 05:49:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-09 05:49:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-09 05:49:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2020-12-09 05:49:12,422 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 14 [2020-12-09 05:49:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:12,422 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2020-12-09 05:49:12,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 05:49:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2020-12-09 05:49:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 05:49:12,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:49:12,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:49:12,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:49:12,423 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:49:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:49:12,424 INFO L82 PathProgramCache]: Analyzing trace with hash 559846421, now seen corresponding path program 1 times [2020-12-09 05:49:12,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:49:12,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103664476] [2020-12-09 05:49:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:49:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:49:12,461 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 05:49:12,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103664476] [2020-12-09 05:49:12,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:49:12,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:49:12,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696035308] [2020-12-09 05:49:12,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:49:12,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:49:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:49:12,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:49:12,463 INFO L87 Difference]: Start difference. First operand 90 states and 194 transitions. Second operand 5 states. [2020-12-09 05:49:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:49:12,481 INFO L93 Difference]: Finished difference Result 82 states and 174 transitions. [2020-12-09 05:49:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:49:12,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-09 05:49:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:49:12,481 INFO L225 Difference]: With dead ends: 82 [2020-12-09 05:49:12,482 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:49:12,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:49:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:49:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:49:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:49:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:49:12,482 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-12-09 05:49:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:49:12,482 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:49:12,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:49:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:49:12,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:49:12,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:49:12,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:49:12 BasicIcfg [2020-12-09 05:49:12,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:49:12,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:49:12,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:49:12,485 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:49:12,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:09" (3/4) ... [2020-12-09 05:49:12,488 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:49:12,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 05:49:12,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 05:49:12,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 05:49:12,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 05:49:12,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 05:49:12,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:49:12,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 05:49:12,521 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cf33c56d-c024-4671-a023-6b67ef64a74c/bin/utaipan/witness.graphml [2020-12-09 05:49:12,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:49:12,522 INFO L168 Benchmark]: Toolchain (without parser) took 3784.60 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 102.7 MB in the beginning and 90.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,522 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 49.8 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:49:12,523 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.99 ms. Allocated memory is still 123.7 MB. Free memory was 102.5 MB in the beginning and 71.5 MB in the end (delta: 31.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,523 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.09 ms. Allocated memory is still 123.7 MB. Free memory was 71.5 MB in the beginning and 69.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,523 INFO L168 Benchmark]: Boogie Preprocessor took 18.65 ms. Allocated memory is still 123.7 MB. Free memory was 69.5 MB in the beginning and 68.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,524 INFO L168 Benchmark]: RCFGBuilder took 272.83 ms. Allocated memory is still 123.7 MB. Free memory was 68.1 MB in the beginning and 83.7 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,524 INFO L168 Benchmark]: TraceAbstraction took 3084.55 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 83.1 MB in the beginning and 93.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,525 INFO L168 Benchmark]: Witness Printer took 36.05 ms. Allocated memory is still 180.4 MB. Free memory was 93.3 MB in the beginning and 90.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:49:12,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 49.8 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.99 ms. Allocated memory is still 123.7 MB. Free memory was 102.5 MB in the beginning and 71.5 MB in the end (delta: 31.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.09 ms. Allocated memory is still 123.7 MB. Free memory was 71.5 MB in the beginning and 69.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.65 ms. Allocated memory is still 123.7 MB. Free memory was 69.5 MB in the beginning and 68.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 272.83 ms. Allocated memory is still 123.7 MB. Free memory was 68.1 MB in the beginning and 83.7 MB in the end (delta: -15.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3084.55 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 83.1 MB in the beginning and 93.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 44.9 MB. Max. memory is 16.1 GB. * Witness Printer took 36.05 ms. Allocated memory is still 180.4 MB. Free memory was 93.3 MB in the beginning and 90.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 743 VarBasedMoverChecksPositive, 37 VarBasedMoverChecksNegative, 6 SemBasedMoverChecksPositive, 31 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 65 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 83 PlacesBefore, 32 PlacesAfterwards, 75 TransitionsBefore, 23 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 59 TotalNumberOfCompositions, 2653 MoverChecksTotal - PositiveResult [Line: 18]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 191 SDtfs, 188 SDslu, 268 SDs, 0 SdLazy, 119 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 248 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 4857 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...