./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe028_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_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe028_pso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/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 95c59b8bce91cc353bb9f27434d4d89596b76ae6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 17:35:12,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:35:12,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:35:12,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:35:12,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:35:12,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:35:12,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:35:12,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:35:12,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:35:12,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:35:12,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:35:12,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:35:12,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:35:12,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:35:12,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:35:12,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:35:12,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:35:12,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:35:12,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:35:12,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:35:12,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:35:12,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:35:12,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:35:12,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:35:12,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:35:12,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:35:12,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:35:12,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:35:12,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:35:12,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:35:12,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:35:12,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:35:12,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:35:12,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:35:12,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:35:12,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:35:12,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:35:12,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:35:12,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:35:12,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:35:12,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:35:12,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 17:35:12,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:35:12,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:35:12,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:35:12,903 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:35:12,903 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:35:12,903 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:35:12,903 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:35:12,903 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:35:12,903 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:35:12,904 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:35:12,904 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:35:12,904 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:35:12,904 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:35:12,904 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:35:12,904 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:35:12,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:35:12,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 17:35:12,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:35:12,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:35:12,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:35:12,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:35:12,908 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_9d3ecba2-dcfb-437e-ad21-a928a61d89de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95c59b8bce91cc353bb9f27434d4d89596b76ae6 [2020-12-09 17:35:13,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:35:13,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:35:13,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:35:13,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:35:13,114 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:35:13,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe028_pso.opt.i [2020-12-09 17:35:13,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/data/e23d47828/13fe58b9383741508e64c689b87ce2ed/FLAGcece981b8 [2020-12-09 17:35:13,564 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:35:13,564 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/sv-benchmarks/c/pthread-wmm/safe028_pso.opt.i [2020-12-09 17:35:13,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/data/e23d47828/13fe58b9383741508e64c689b87ce2ed/FLAGcece981b8 [2020-12-09 17:35:13,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/data/e23d47828/13fe58b9383741508e64c689b87ce2ed [2020-12-09 17:35:13,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:35:13,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:35:13,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:35:13,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:35:13,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:35:13,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dc9edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13, skipping insertion in model container [2020-12-09 17:35:13,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:35:13,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:35:13,738 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_9d3ecba2-dcfb-437e-ad21-a928a61d89de/sv-benchmarks/c/pthread-wmm/safe028_pso.opt.i[949,962] [2020-12-09 17:35:13,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:35:13,834 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:35:13,842 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_9d3ecba2-dcfb-437e-ad21-a928a61d89de/sv-benchmarks/c/pthread-wmm/safe028_pso.opt.i[949,962] [2020-12-09 17:35:13,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:35:13,913 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:35:13,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13 WrapperNode [2020-12-09 17:35:13,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:35:13,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:35:13,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:35:13,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:35:13,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:35:13,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:35:13,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:35:13,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:35:13,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... [2020-12-09 17:35:13,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:35:13,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:35:13,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:35:13,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:35:13,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/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 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-09 17:35:14,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-09 17:35:14,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-09 17:35:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-09 17:35:14,024 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-09 17:35:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:35:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-09 17:35:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:35:14,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:35:14,025 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 17:35:14,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:35:14,233 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 17:35:14,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:35:14 BoogieIcfgContainer [2020-12-09 17:35:14,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:35:14,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:35:14,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:35:14,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:35:14,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:35:13" (1/3) ... [2020-12-09 17:35:14,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa47eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:35:14, skipping insertion in model container [2020-12-09 17:35:14,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:35:13" (2/3) ... [2020-12-09 17:35:14,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa47eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:35:14, skipping insertion in model container [2020-12-09 17:35:14,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:35:14" (3/3) ... [2020-12-09 17:35:14,241 INFO L111 eAbstractionObserver]: Analyzing ICFG safe028_pso.opt.i [2020-12-09 17:35:14,251 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-09 17:35:14,252 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:35:14,254 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 17:35:14,254 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-09 17:35:14,278 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,279 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,279 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,279 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,279 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,279 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,280 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,280 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,280 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,280 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,281 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,281 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,281 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,281 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,282 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,283 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,283 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,283 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,283 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,284 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,284 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,284 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,284 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,285 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,285 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,285 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,285 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,286 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,286 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,286 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,286 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,288 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,289 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,289 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,289 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,293 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,294 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,294 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,294 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,296 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,296 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,296 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,296 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-09 17:35:14,298 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-09 17:35:14,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 17:35:14,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:35:14,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 17:35:14,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:35:14,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:35:14,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:35:14,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:35:14,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:35:14,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:35:14,328 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-09 17:35:14,329 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 17:35:14,331 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 74 transitions, 163 flow [2020-12-09 17:35:14,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2020-12-09 17:35:14,367 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2020-12-09 17:35:14,367 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-09 17:35:14,370 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 2/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-12-09 17:35:14,372 INFO L116 LiptonReduction]: Number of co-enabled transitions 1212 [2020-12-09 17:35:16,068 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 17:35:16,274 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-09 17:35:16,389 INFO L131 LiptonReduction]: Checked pairs total: 2149 [2020-12-09 17:35:16,389 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-12-09 17:35:16,393 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-12-09 17:35:16,407 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 274 states. [2020-12-09 17:35:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states. [2020-12-09 17:35:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:35:16,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,413 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1647971710, now seen corresponding path program 1 times [2020-12-09 17:35:16,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827660132] [2020-12-09 17:35:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:16,531 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 17:35:16,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827660132] [2020-12-09 17:35:16,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:16,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:16,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941628824] [2020-12-09 17:35:16,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:35:16,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:16,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:35:16,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:35:16,545 INFO L87 Difference]: Start difference. First operand 274 states. Second operand 2 states. [2020-12-09 17:35:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:16,563 INFO L93 Difference]: Finished difference Result 274 states and 786 transitions. [2020-12-09 17:35:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:35:16,564 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 17:35:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:16,573 INFO L225 Difference]: With dead ends: 274 [2020-12-09 17:35:16,574 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 17:35:16,574 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 17:35:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 17:35:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-12-09 17:35:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-09 17:35:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 634 transitions. [2020-12-09 17:35:16,616 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 634 transitions. Word has length 8 [2020-12-09 17:35:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:16,617 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 634 transitions. [2020-12-09 17:35:16,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:35:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 634 transitions. [2020-12-09 17:35:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:35:16,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:35:16,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash -452492411, now seen corresponding path program 1 times [2020-12-09 17:35:16,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903229033] [2020-12-09 17:35:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:16,714 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 17:35:16,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903229033] [2020-12-09 17:35:16,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:16,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428212792] [2020-12-09 17:35:16,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:16,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:16,717 INFO L87 Difference]: Start difference. First operand 226 states and 634 transitions. Second operand 4 states. [2020-12-09 17:35:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:16,738 INFO L93 Difference]: Finished difference Result 250 states and 668 transitions. [2020-12-09 17:35:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:16,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 17:35:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:16,740 INFO L225 Difference]: With dead ends: 250 [2020-12-09 17:35:16,740 INFO L226 Difference]: Without dead ends: 202 [2020-12-09 17:35:16,741 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 17:35:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-09 17:35:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-09 17:35:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-09 17:35:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 552 transitions. [2020-12-09 17:35:16,754 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 552 transitions. Word has length 9 [2020-12-09 17:35:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:16,754 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 552 transitions. [2020-12-09 17:35:16,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 552 transitions. [2020-12-09 17:35:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:35:16,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:35:16,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1142322672, now seen corresponding path program 1 times [2020-12-09 17:35:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636917784] [2020-12-09 17:35:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:16,814 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 17:35:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636917784] [2020-12-09 17:35:16,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:16,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:35:16,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469140210] [2020-12-09 17:35:16,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:16,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:16,816 INFO L87 Difference]: Start difference. First operand 202 states and 552 transitions. Second operand 5 states. [2020-12-09 17:35:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:16,865 INFO L93 Difference]: Finished difference Result 262 states and 697 transitions. [2020-12-09 17:35:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:35:16,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 17:35:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:16,866 INFO L225 Difference]: With dead ends: 262 [2020-12-09 17:35:16,866 INFO L226 Difference]: Without dead ends: 154 [2020-12-09 17:35:16,867 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 17:35:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-09 17:35:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-12-09 17:35:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-09 17:35:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 392 transitions. [2020-12-09 17:35:16,874 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 392 transitions. Word has length 10 [2020-12-09 17:35:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:16,874 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 392 transitions. [2020-12-09 17:35:16,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 392 transitions. [2020-12-09 17:35:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:35:16,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:35:16,876 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash -2010812812, now seen corresponding path program 1 times [2020-12-09 17:35:16,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049646957] [2020-12-09 17:35:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:16,913 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 17:35:16,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049646957] [2020-12-09 17:35:16,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:16,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:35:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557577622] [2020-12-09 17:35:16,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:35:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:35:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:16,915 INFO L87 Difference]: Start difference. First operand 154 states and 392 transitions. Second operand 3 states. [2020-12-09 17:35:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:16,922 INFO L93 Difference]: Finished difference Result 130 states and 299 transitions. [2020-12-09 17:35:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:35:16,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 17:35:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:16,923 INFO L225 Difference]: With dead ends: 130 [2020-12-09 17:35:16,923 INFO L226 Difference]: Without dead ends: 130 [2020-12-09 17:35:16,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:35:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-09 17:35:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-12-09 17:35:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-09 17:35:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 299 transitions. [2020-12-09 17:35:16,928 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 299 transitions. Word has length 11 [2020-12-09 17:35:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:16,929 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 299 transitions. [2020-12-09 17:35:16,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:35:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 299 transitions. [2020-12-09 17:35:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:35:16,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:35:16,930 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -216590115, now seen corresponding path program 1 times [2020-12-09 17:35:16,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513135963] [2020-12-09 17:35:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:16,967 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 17:35:16,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513135963] [2020-12-09 17:35:16,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:16,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:35:16,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627551083] [2020-12-09 17:35:16,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:35:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:35:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:35:16,970 INFO L87 Difference]: Start difference. First operand 130 states and 299 transitions. Second operand 4 states. [2020-12-09 17:35:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:16,985 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2020-12-09 17:35:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:35:16,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 17:35:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:16,986 INFO L225 Difference]: With dead ends: 92 [2020-12-09 17:35:16,986 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 17:35:16,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 17:35:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 17:35:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-09 17:35:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-09 17:35:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2020-12-09 17:35:16,992 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 12 [2020-12-09 17:35:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:16,992 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2020-12-09 17:35:16,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:35:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2020-12-09 17:35:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:35:16,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:16,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:35:16,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:35:16,993 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1316923756, now seen corresponding path program 1 times [2020-12-09 17:35:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:16,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698200397] [2020-12-09 17:35:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:17,033 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 17:35:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698200397] [2020-12-09 17:35:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:17,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579542237] [2020-12-09 17:35:17,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:17,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:17,035 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand 5 states. [2020-12-09 17:35:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:17,053 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2020-12-09 17:35:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:17,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 17:35:17,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:17,054 INFO L225 Difference]: With dead ends: 73 [2020-12-09 17:35:17,054 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 17:35:17,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 17:35:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 17:35:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 17:35:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2020-12-09 17:35:17,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 14 [2020-12-09 17:35:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:17,058 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2020-12-09 17:35:17,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2020-12-09 17:35:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 17:35:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:17,060 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 17:35:17,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 17:35:17,060 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 193291591, now seen corresponding path program 1 times [2020-12-09 17:35:17,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:17,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251849102] [2020-12-09 17:35:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:17,119 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 17:35:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251849102] [2020-12-09 17:35:17,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:17,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844643485] [2020-12-09 17:35:17,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:17,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:17,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:17,121 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand 5 states. [2020-12-09 17:35:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:17,144 INFO L93 Difference]: Finished difference Result 87 states and 170 transitions. [2020-12-09 17:35:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:17,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 17:35:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:17,145 INFO L225 Difference]: With dead ends: 87 [2020-12-09 17:35:17,145 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 17:35:17,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 17:35:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 17:35:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 17:35:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 52 transitions. [2020-12-09 17:35:17,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 52 transitions. Word has length 17 [2020-12-09 17:35:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:17,147 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 52 transitions. [2020-12-09 17:35:17,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 52 transitions. [2020-12-09 17:35:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 17:35:17,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:35:17,148 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 17:35:17,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 17:35:17,148 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 17:35:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:35:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1222037843, now seen corresponding path program 2 times [2020-12-09 17:35:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:35:17,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63178094] [2020-12-09 17:35:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:35:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:35:17,207 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 17:35:17,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63178094] [2020-12-09 17:35:17,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:35:17,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:35:17,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316296654] [2020-12-09 17:35:17,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:35:17,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:35:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:35:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:35:17,209 INFO L87 Difference]: Start difference. First operand 34 states and 52 transitions. Second operand 5 states. [2020-12-09 17:35:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:35:17,231 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2020-12-09 17:35:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:35:17,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-09 17:35:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:35:17,231 INFO L225 Difference]: With dead ends: 33 [2020-12-09 17:35:17,231 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:35:17,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:35:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:35:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:35:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:35:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:35:17,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-12-09 17:35:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:35:17,232 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:35:17,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:35:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:35:17,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:35:17,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 17:35:17,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:35:17 BasicIcfg [2020-12-09 17:35:17,234 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:35:17,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:35:17,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:35:17,235 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:35:17,235 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:35:14" (3/4) ... [2020-12-09 17:35:17,238 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:35:17,244 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-09 17:35:17,244 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-09 17:35:17,244 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-09 17:35:17,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 17:35:17,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 17:35:17,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:35:17,248 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:35:17,276 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d3ecba2-dcfb-437e-ad21-a928a61d89de/bin/utaipan/witness.graphml [2020-12-09 17:35:17,276 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:35:17,277 INFO L168 Benchmark]: Toolchain (without parser) took 3688.15 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.5 MB in the beginning and 37.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 58.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,277 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 92.3 MB. Free memory is still 69.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:35:17,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.97 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 44.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,278 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 92.3 MB. Free memory was 44.4 MB in the beginning and 42.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,279 INFO L168 Benchmark]: Boogie Preprocessor took 20.64 ms. Allocated memory is still 92.3 MB. Free memory was 42.3 MB in the beginning and 71.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,279 INFO L168 Benchmark]: RCFGBuilder took 269.95 ms. Allocated memory is still 92.3 MB. Free memory was 71.2 MB in the beginning and 52.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,279 INFO L168 Benchmark]: TraceAbstraction took 2997.78 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.7 MB in the beginning and 39.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 55.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,280 INFO L168 Benchmark]: Witness Printer took 41.27 ms. Allocated memory is still 134.2 MB. Free memory was 39.7 MB in the beginning and 37.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:35:17,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 92.3 MB. Free memory is still 69.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.97 ms. Allocated memory is still 92.3 MB. Free memory was 51.4 MB in the beginning and 44.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 92.3 MB. Free memory was 44.4 MB in the beginning and 42.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.64 ms. Allocated memory is still 92.3 MB. Free memory was 42.3 MB in the beginning and 71.2 MB in the end (delta: -28.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 269.95 ms. Allocated memory is still 92.3 MB. Free memory was 71.2 MB in the beginning and 52.1 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2997.78 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 51.7 MB in the beginning and 39.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 55.8 MB. Max. memory is 16.1 GB. * Witness Printer took 41.27 ms. Allocated memory is still 134.2 MB. Free memory was 39.7 MB in the beginning and 37.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 784 VarBasedMoverChecksPositive, 31 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 24 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 49 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 82 PlacesBefore, 31 PlacesAfterwards, 74 TransitionsBefore, 22 TransitionsAfterwards, 1212 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 63 TotalNumberOfCompositions, 2149 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, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 148 SDtfs, 126 SDslu, 207 SDs, 0 SdLazy, 77 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3082 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...